Chinertown

Chinese Carbon Road Bikes => Cyclocross Frames, Wheels & Components => Topic started by: radrick_91 on July 28, 2025, 02:47:14 PM

Title: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: radrick_91 on July 28, 2025, 02:47:14 PM
Hi all,

After a bit of a delay, I’m finally sharing my first impressions of a prototype gravel wheelset from XM Carbonspeed. I had a chance to chat with Peter from XMCS at Eurobike and received the wheels at a discounted rate in exchange for providing honest feedback here.

Unboxing & Initial Impressions
   •   Finish: Matte satin surface, golden water-transfer logos, raw titanium spokes, black hubs and nipples – very clean, high-end look.
   •   Rim profile: 42 mm outer / 33 mm inner width. Looks massive at first glance, but pairs surprisingly well with 40–45 mm tires and creates a smooth aero transition.
   •   Build quality: Excellent. The internal finish is flawless – no carbon debris, resin residue or visible imperfections.

Measured Weight (kitchen scale)
   •   Front: 615 g
   •   Rear (HG freehub): 720 g
   •   Total: 1,335 g

The XDR version is ~3 g lighter. Very impressive numbers for such wide rims with titanium spokes. XMCS claims T1100 carbon – which could explain the low weight, assuming durability holds up.

Tubeless Setup
   •   Tape: Buckless 35 mm
   •   Valves: Buckless aluminum
   •   Sealant: Schwalbe Doc Blue (60 ml front / 65 ml rear)
   •   Tires: Tufo Gravel Thundero – front 40 mm, rear 44 mm (both used)

Setup was straightforward – both tires seated immediately with a Tyre Booster.

Measured Tire Widths (@32 psi, compared to Zipp 303s)
   •   Front: 39.6 mm → 43.6 mm
   •   Rear: 43.3 mm → 47.6 mm

Next Steps
I’ll be testing them further on my custom titanium gravel bike – visually a perfect match. Ride impressions to follow soon.

If you have any questions or want specific feedback, feel free to ask!
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: impmonkey on July 28, 2025, 03:02:58 PM
How deep is the rim? They look beautiful.
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: kbernstein on July 28, 2025, 03:06:14 PM
40mm deep? Either the hub is a tank or titanium spokes aren't as light as I imagined.
I am very interested in titanium spokes nonetheless. Is there a word from Peter about them? How much does a spoke weigh, and does he have data for stiffness and comfort?
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: radrick_91 on July 28, 2025, 03:11:34 PM
Sorry, I forgot to mention: the rims are 53 mm deep.

I don’t have detailed spoke specs yet, unfortunately. The hubs are in-house designs by Peter (XMCS), featuring high-quality bearings and a 36T ratchet system.
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: Asco on July 29, 2025, 02:01:08 AM
Wow, very cool wheelset. 1330g is just crazy.

1) Are they hookless? Can't tell from the pics.
2) Can they be ordered without spoke holes?

Thanks
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: radrick_91 on July 29, 2025, 02:19:53 AM
Wow, very cool wheelset. 1330g is just crazy.

1) Are they hookless? Can't tell from the pics.
2) Can they be ordered without spoke holes?

Thanks

Re 1) No, the rims are hooked. For me, that's a big bonus.

Re 2) You'll have to ask Peter, but I would guess yes, since the nipples and spokes are very similar in dimensions to standard spokes (such as Sapim CX-Ray).
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: Rolle2k on July 31, 2025, 09:38:57 AM
I have ordered these myself, but with CX-RAY spokes. They are expected to weight 1380gr according to Peter. Will probably ship this or next week - so i'll get final weight quite soon.
Will be really fun to try them soon.
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: Aerosoul on August 02, 2025, 10:57:20 AM
Looks nice with the bike. Who made the bike for you?
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: Rolle2k on August 02, 2025, 06:37:03 PM
radrick_91: what inner width are the zipp wheels you are comparing with? Thinking about tyre stretch, and about how much wider tyres will be compared to my 24mm inner width wheels.
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: radrick_91 on August 03, 2025, 03:28:29 AM
Looks nice with the bike. Who made the bike for you?

The design is my own, and I had the frame custom-made by Waltly.
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: radrick_91 on August 03, 2025, 03:33:37 AM
radrick_91: what inner width are the zipp wheels you are comparing with? Thinking about tyre stretch, and about how much wider tyres will be compared to my 24mm inner width wheels.

The Zipp 303s I used for comparison have an internal width of 23 mm and are hookless – I hope that helps with your decision.
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: tgarne on August 04, 2025, 03:58:59 PM
What do Peter sell them for?

Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: Rolle2k on August 04, 2025, 05:38:59 PM
Depends on configuration. But they were 670USD with CX-RAY spokes, and i was quoted 770USD with titanium spokes. Choosed CX-ray to have something widely available rather than something harder to find.
Shipping depends on country but in my case $115.
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: PeterXu on August 05, 2025, 05:55:39 AM
Depends on configuration. But they were 670USD with CX-RAY spokes, and i was quoted 770USD with titanium spokes. Choosed CX-ray to have something widely available rather than something harder to find.
Shipping depends on country but in my case $115.
To be clear, I told you that you guys are the earliest guys who order these wheels, so there were discount for those orders.

T1100 version D53TU-41 wheelset UD paintless built with new R248 lighter hubs 24/24H 36T rachets TPI steel bearings with Shimano HG driver, Sapim CX-Ray spokes, Sapim self-securing aluminum nipples weighs around 1375g/pair, and they are 800 USD/pair excluding shipping,

Same combo built with titanium spokes would weigh around 1330g/pair and they would be 900 USD/pair excluding shipping

T800 version wheelset UD paintless finish with old R280 hubs with Sapim CX-Ray spokes, Sapim self-securing nipples would be 715 USD/pair and weighs around 1445g/pair

Sapim brass nipples would increase the wieght around 35g/ set
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: Rolle2k on August 05, 2025, 05:32:53 PM
Sorry Peter, i cannot remember that you told me that, but i'm usually quite distracted, so that is probably just on me.
Anyway, cannot wait for the wheels and Sorry for writing wrong pricing here. Good value anyways!
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: PeterXu on August 05, 2025, 09:42:36 PM
Sorry Peter, i cannot remember that you told me that, but i'm usually quite distracted, so that is probably just on me.
Anyway, cannot wait for the wheels and Sorry for writing wrong pricing here. Good value anyways!
That is OK. Hope you will get your new wheels soon and love them as always. Looking forward to you guys' reviews.
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: radrick_91 on August 15, 2025, 11:39:16 AM
Hi all,
I’ve completed my first rides on the wheels – about 200 km in total. Unfortunately, my last outing ended in a self-inflicted crash, so here’s just a quick update before I post a full review once I’m back on the bike.
Roughly half of the distance was on tarmac, the other half on light gravel (what we’d call “forest Autobahn” in Germany), with only a few short singletrack sections. So far, no major climbs or descents and no technically challenging trails – that part is still to come.

pros
neutral / learnings
cons
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: St0mpB0x on August 22, 2025, 04:11:16 AM
Would be great to see some pictures with tires mounted up to see how the shapes look.
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: radrick_91 on August 22, 2025, 11:59:24 AM
Would be great to see some pictures with tires mounted up to see how the shapes look.

Not the best pictures, sorry — but after the crash, neither the bike nor I are fully back in shape yet. Running Tufo tires: 40 mm in the front and 44 mm in the rear.

Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: AlmanL. on October 20, 2025, 09:40:22 AM
Are you have actual pics ?
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: NB87 on October 20, 2025, 03:40:59 PM
I'm not sure how to read this:

"Measured Tire Widths (@32 psi, compared to Zipp 303s)
   •   Front: 39.6 mm → 43.6 mm
   •   Rear: 43.3 mm → 47.6 mm"

Do you mean that with Zipp 303s it's 39.6 mm with 40mm tire & 43.3 with 45mm tire? And with Peter's rims it's the dimensions after -> ?

I'm in the market for some wheels, but I'm limited to 40mm tire clearance at the rear.. :( Would love the new wheelset to be future-proof (i.e. 30mm something internal width for when I'm getting a new frame)

Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: radrick_91 on October 21, 2025, 01:28:49 AM
I'm not sure how to read this:

"Measured Tire Widths (@32 psi, compared to Zipp 303s)
   •   Front: 39.6 mm → 43.6 mm
   •   Rear: 43.3 mm → 47.6 mm"

Do you mean that with Zipp 303s it's 39.6 mm with 40mm tire & 43.3 with 45mm tire? And with Peter's rims it's the dimensions after -> ?

I'm in the market for some wheels, but I'm limited to 40mm tire clearance at the rear.. :( Would love the new wheelset to be future-proof (i.e. 30mm something internal width for when I'm getting a new frame)

Sorry, that wasn't clear, but you understood correctly.
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: AlmanL. on October 21, 2025, 04:24:57 AM
Do you have other pics from your bicycle with these mounted wheels?
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: radrick_91 on October 21, 2025, 05:21:13 AM
Do you have other pics from your bicycle with these mounted wheels?
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: radrick_91 on November 23, 2025, 01:21:48 PM
Max Walscheid on the road with these wheels from Peter :) XMCS on its way to the World Tour  8)

Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: Nomuetze on December 02, 2025, 11:47:52 AM
Convinced and ordered… ;D
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: acwj8rwh on December 06, 2025, 12:59:51 PM
Finished my long distance build.

Specialized Diverge MY18 Frame 54 with 35-622 Michelin Pro 5 TLR 35 (measured 39,5mm).
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: radrick_91 on December 06, 2025, 04:50:58 PM
Finished my long distance build.

Specialized Diverge MY18 Frame 54 with 35-622 Michelin Pro 5 TLR 35 (measured 39,5mm).

Great build.

Are you satisfied? How do the wheels feel? Aren't 35mm tires almost too narrow?
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: acwj8rwh on December 08, 2025, 03:34:55 PM
Great build.

Are you satisfied? How do the wheels feel? Aren't 35mm tires almost too narrow?

Did my first ride today (~72km) and I'm really happy with the result. It's comfortable, has lots of grip and is feels quick.
But I don't have any data to back that up. I simply believe the latest research which shows that...
And all of that without compromising performance.

The widths match quite nice according the 105%-rule (42mm outer rim width; 39.5mm tire width).

The Michelin Pro 5 tires have an unmounted tread width of 45mm, which is even more than the Pirelli P Zero 40-622 at 42mm. This means that even when stretched, the risk of running off the tread is reduced.



Regarding ETRTO compliance: I don't really like the concept of regulatory documents being behind a paywall. Additionally, it seems that bicycle tire standards are outdated and not up to current requirements. The complexity also exceeds that of car/motorcycle tire standards. While ETRTO is indeed a technical institution with regulatory purposes and its importance is highly regarded in various forums, threads, and Reddit discussions, this apparently doesn't tell the whole story.

This article provides valuable insights: https://www.cyclingweekly.com/products/will-the-adoption-of-tubeless-technology-finally-force-wheel-and-tyre-brands-to-get-friendly

The most prominent example of deviating from ETRTO standards is SRAM/Zipp. They allow a 40mm tire on their 303 XPLR wheels  (32mm inner width rim) through their 'dual testing' approach, far from ETRTO standards.
Quote
ISO Certified tire combinations are within ISO approved standards. These compatibilities are as reported by the respective tire manufacturers.
Dual Tested tire combinations have been tested by both the tire manufacturer and Zipp for compatibility.
Zipp limits the tire size compatibility on 303 XPLR wheels to tires between 40-60mm. Within this range, ISO tire and rim size guidelines allow any TSS-compatible tire sized from 58x622 up to 60x622 (29"×2.3"-2.35").
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: LittleBobcat on December 15, 2025, 09:27:07 PM
Did my first ride today (~72km) and I'm really happy with the result. It's comfortable, has lots of grip and is feels quick.
But I don't have any data to back that up. I simply believe the latest research which shows that...
  • wider tires reduce rolling resistance
  • increasing comfort through greater air volume as suspension minimizes rider fatigue
And all of that without compromising performance.

The widths match quite nice according the 105%-rule (42mm outer rim width; 39.5mm tire width).

The Michelin Pro 5 tires have an unmounted tread width of 45mm, which is even more than the Pirelli P Zero 40-622 at 42mm. This means that even when stretched, the risk of running off the tread is reduced.



Regarding ETRTO compliance: I don't really like the concept of regulatory documents being behind a paywall. Additionally, it seems that bicycle tire standards are outdated and not up to current requirements. The complexity also exceeds that of car/motorcycle tire standards. While ETRTO is indeed a technical institution with regulatory purposes and its importance is highly regarded in various forums, threads, and Reddit discussions, this apparently doesn't tell the whole story.

This article provides valuable insights: https://www.cyclingweekly.com/products/will-the-adoption-of-tubeless-technology-finally-force-wheel-and-tyre-brands-to-get-friendly

The most prominent example of deviating from ETRTO standards is SRAM/Zipp. They allow a 40mm tire on their 303 XPLR wheels  (32mm inner width rim) through their 'dual testing' approach, far from ETRTO standards.
zipp gravel tires are vastly different from normal standard tires on thread width, puncture belt and full bead width. They don't allow just any 40mm tire on their xplr wheels but only their dedicated tires. Using normal 40mm tires on 32mm+ iw wheels is mostly okay in tests (yeah they won't get rip off anyway) but they balloon up too much (meaning the badged spec useless and aero penalties) and the cross section layout would be sub-optimal from the tires' original design which results in RR penalties.
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: acwj8rwh on December 16, 2025, 06:10:15 AM
zipp gravel tires are vastly different from normal standard tires on thread width, puncture belt and full bead width. They don't allow just any 40mm tire on their xplr wheels but only their dedicated tires. Using normal 40mm tires on 32mm+ iw wheels is mostly okay in tests (yeah they won't get rip off anyway) but they balloon up too much (meaning the badged spec useless and aero penalties) and the cross section layout would be sub-optimal from the tires' original design which results in RR penalties.

I just checked the Zipp G40 XPLR 40mm. It has the same unmounted tread width like the Michelin Pro 5 at 45mm. Sure the casing width is more (89mm vs. 107mm), due to the 40mm specification. Which looks like more or less average in the 40mm tire cat. I don't see much information on the puncture belt.

From BRR on the G40 Zipp tires:
The weakest point seems to be the puncture resistance of both the tread and sidewalls. The low scores here are probably also partly attributed to the "fishnet" style puncture protection that will only work well on punctures bigger than 3 mm.

Regarding the other claims:
True, the specified tire width is different than the actual one on a wide rim. Acc. ETRTO standards the normal inner rim width for a 35mm wide tire would be between 17-20mm.

Aero penalties of wider tires is rather small (less than aero socks delta). Afaik it's 3,6W for each 10mm of tire for a pair of tires at 30kph. But I could not find any data on aero testing for wide tires with wide aero wheels.

Regarding the RR penalty on the wider rims, I quote BRR again:
Peak rolling resistance performance seems to be reached when the rim width is somewhere between 65% and 75% of the specified width of the tire. Our other conclusion is that a rim width that is within 50 to 80% of the specified tire width results in performance that is within 99% of peak performance. Only when the rim is narrower than 50% of the specified width of the tire, performance starts to drop-off at a faster rate. The drop-off is small as you'll still get 95% of peak performance when the rim has a width of only 30% of the specified width of the tire.
My tire-inner-rim-width combination is at 82% is a bit out of the optimal range (65..75%), but I lose around max. 1% of performance in that regard. This would result in a penalty of 0.276W (for both tires). Is this worth mentioning? I guess not.

Please let me know if you find valuable information on the topic or correct me if I'm wrong.
But other than that your post doesn't include much information and seems like a opinion rather than a facts.
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: CB on January 16, 2026, 02:18:09 AM
That is OK. Hope you will get your new wheels soon and love them as always. Looking forward to you guys' reviews.

Hi

Long time lurker on the forum here.  I just wanted to give some positive feedback.

I ordered a wheelset from xm carbonspeed and have been in contact with Peter via whatsapp.  His communication has been truly exceptional, sometimes even replying when it was well after midnight on his side. 

It was a pleasure to do business with them.

Thank you Peter!

Kind regards,
Christoff
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: radrick_91 on January 20, 2026, 09:48:45 AM
Hi

Long time lurker on the forum here.  I just wanted to give some positive feedback.

I ordered a wheelset from xm carbonspeed and have been in contact with Peter via whatsapp.  His communication has been truly exceptional, sometimes even replying when it was well after midnight on his side. 

It was a pleasure to do business with them.

Thank you Peter!

Kind regards,
Christoff

Hi Christoff,

Sounds great—what kind of bike and tires are you riding with the wheelset? If you like, feel free to upload a photo. I always enjoy seeing new inspiration.

Thanks, and have fun with the wheels!
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: CB on January 21, 2026, 03:29:49 PM
Hi

I have an s-works epic 8 with flight attendant that I’m building up as a drop bar for long distace gravel type races. I have asked Peter to build the wheels on mtb boost hubs. I usually use thunder burt 2.1 or 2.25 tires. I just have to figure what stem lenght to use. Fingers crossed the fit works out nicely!
I’ll defenitely post some pics as soon as I have received all the bits and have it set up. 

Your ti bike looks awesome!

Cheers
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: johnnyboy4711 on January 22, 2026, 06:17:31 AM
Looks like a great option
wondering whats the price delivered to Europe for a set?
thanks
J
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: radrick_91 on January 23, 2026, 01:45:30 AM
Looks like a great option
wondering whats the price delivered to Europe for a set?
thanks
J

You can check the website for an initial assessment:

https://www.xmcarbonspeed.cc/products/carbon-speed-t1100-carbon-700c-53mm-depth-325mm-internal-41mm-external-width-gravel-wheelsets-with-titanium-spokes (https://www.xmcarbonspeed.cc/products/carbon-speed-t1100-carbon-700c-53mm-depth-325mm-internal-41mm-external-width-gravel-wheelsets-with-titanium-spokes)

Then I would recommend contacting Peter directly via email or WhatsApp to clarify the exact wheel set specifications (carbon layup, hubs, spokes) – you will then receive the exact price including shipping. The ones from the link are the highest specs/most expensive, I think.

If you have any questions about the process, please feel free to contact me.
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: Requiem84 on January 23, 2026, 08:52:45 AM
To add to this, since a couple of weeks our Dutch selling point for XMCS is live @ www.xmcs.nl. Official partner of XMCS :).

Obviously if you’re not close to the Netherlands you can just as easily contact Peter himself directly. We can help out on any questions on the products and ordering process etc in any case.
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: Bambelbie on February 01, 2026, 03:16:08 PM
here you go...
XMCS Gravelwheels...on my Altera.
built with Rotor Uno 1x13
Thundero 48 measure 51mm
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: Grailer on February 01, 2026, 06:06:11 PM
I'll add mine as well for those who don't follow the Mondince frame thread!
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: darario on February 02, 2026, 03:15:59 PM
And here‘s my Tantan GR201.
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: Uberflo on February 03, 2026, 03:04:12 PM
Peter finished my wheelset
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: rhenders on February 05, 2026, 05:33:52 PM
And here‘s my Tantan GR201.
Are those 2.1 thunder burts? How wide do they measure on these wheels?
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: radrick_91 on February 06, 2026, 12:10:46 PM
Thanks for sharing, guys – I'm impressed by your bikes. They all look stunning - great work. A few nerdy questions

@Bambelbie, The bike looks great, the whole setup seems very balanced, hats off! How do you like the Altera? I'm also considering another gravel frame that's a bit more race-oriented. Do you think the Altera could also be used for cyclocross (with different wheels)? Is it agile enough for that?

@Grailer,Great build. I like your bottle holders. Can you tell us the model?

@darario Really nice build. I love that purple! Does the Magene PES fit into the frame without any problems (I'm thinking about the chain line/q-factor)?

@Uberflo, You went all in. Awesome! Carbon spokes and titanium freehub, right? Mega. Do you want to use the wheels for gravel or more for all-road?
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: Bambelbie on February 06, 2026, 12:38:33 PM
@radrick_91
i do like it very much. as of cycleX ...I am no expert in this special discipline...I did some X with my MASON Bokeh years ago.
but nevertheless the Altera is versatile: I also rode it with 35mm slicks on the road and it has mounting ports for a rack for bike packing. my only small complaint are those bento-boxes for storage...imo too small to put "real" items in as the opening cut out is quit narrow, so you might struggle to get your things out again.


Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: Uberflo on February 06, 2026, 03:05:19 PM
Thanks for sharing, guys – I'm impressed by your bikes. They all look stunning - great work. A few nerdy questions

@Bambelbie, The bike looks great, the whole setup seems very balanced, hats off! How do you like the Altera? I'm also considering another gravel frame that's a bit more race-oriented. Do you think the Altera could also be used for cyclocross (with different wheels)? Is it agile enough for that?

@Grailer,Great build. I like your bottle holders. Can you tell us the model?

@darario Really nice build. I love that purple! Does the Magene PES fit into the frame without any problems (I'm thinking about the chain line/q-factor)?

@Uberflo, You went all in. Awesome! Carbon spokes and titanium freehub, right? Mega. Do you want to use the wheels for gravel or more for all-road?

Yes, will use it Offroad with 2,25" tyres
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: Grailer on February 06, 2026, 04:40:18 PM

@Grailer,Great build. I like your bottle holders. Can you tell us the model?


Thanks! They're just some generic titanium holders from AE that're essentially Silca knockoffs. ~$12 USD each. Carbon would have been a bit lighter, but I liked the titanium look.
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: darario on February 08, 2026, 07:43:04 AM
Thanks for sharing, guys – I'm impressed by your bikes. They all look stunning - great work. A few nerdy questions

@Bambelbie, The bike looks great, the whole setup seems very balanced, hats off! How do you like the Altera? I'm also considering another gravel frame that's a bit more race-oriented. Do you think the Altera could also be used for cyclocross (with different wheels)? Is it agile enough for that?

@Grailer,Great build. I like your bottle holders. Can you tell us the model?

@darario Really nice build. I love that purple! Does the Magene PES fit into the frame without any problems (I'm thinking about the chain line/q-factor)?

@Uberflo, You went all in. Awesome! Carbon spokes and titanium freehub, right? Mega. Do you want to use the wheels for gravel or more for all-road?

I had to space out the Magene P515 by 1.3mm.
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: akira11 on February 08, 2026, 11:15:45 AM
Yes, will use it Offroad with 2,25" tyres
please report back when you ride them, very interested in how these handle crosswinds
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: Rolle2k on February 08, 2026, 04:25:12 PM
With 45mm Caracal Race they are LESS sensitive than my old Elitewheels edge gravel 45mm deep, with Strada Bianca TLR 45mm tires.. which is quite impressive.
Of course you can feel wind if you have them paired with large tires, and there is heavy crosswinds - but actually in my case it was alot better than i expected 😊
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: Jakethesnake on February 10, 2026, 09:33:44 PM
Got my wheels from Peter and mounted up some Thundero 48s that measure out to 51.3mm. Wheels feel really good so far. Going to put some more miles on them with wider rubber as well.
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: akira11 on February 11, 2026, 02:44:34 PM
omg that bike is beautiful
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: velostar on February 25, 2026, 01:09:39 PM
I placed an order for these wheels! They'll be paired with a Yoeleo Altera G21 frame that I ordered from Power Meter City in CA.

Shipping to US was $150 via FedEx, with a $61 "service charge". Not sure what that is exactly. Tariff, maybe? Total cost about $1,270. Definitely an increase from what others had reported from last year.

In a comment to my order on the XMCS site, I asked if the titanium color hub could be swapped to black.
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: hoangtrridung on March 08, 2026, 10:15:34 PM
To be clear, I told you that you guys are the earliest guys who order these wheels, so there were discount for those orders.

T1100 version D53TU-41 wheelset UD paintless built with new R248 lighter hubs 24/24H 36T rachets TPI steel bearings with Shimano HG driver, Sapim CX-Ray spokes, Sapim self-securing aluminum nipples weighs around 1375g/pair, and they are 800 USD/pair excluding shipping,

Same combo built with titanium spokes would weigh around 1330g/pair and they would be 900 USD/pair excluding shipping

T800 version wheelset UD paintless finish with old R280 hubs with Sapim CX-Ray spokes, Sapim self-securing nipples would be 715 USD/pair and weighs around 1445g/pair

Sapim brass nipples would increase the wieght around 35g/ set
How much for shipping 1 Wheelset to HaNoi, VietNam and it take how many day ?
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: MGIBBO on March 18, 2026, 12:17:07 AM
These wheels look very nice

Has anyone tried 2.1 thunderburts and measured the tyre width?

Cheers Matt
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: darario on March 18, 2026, 03:08:27 PM
Yes. It‘s 54 mm.
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: klaw1 on March 20, 2026, 02:00:07 AM
how does the stiffness compare to steel spokes or carbon spokes? I understand the vibration dampening can help but what about speed and acceleration?
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: St0mpB0x on March 29, 2026, 05:09:43 AM
Slightly less stiff than steel spokes of equal mass. Significantly less stiff than carbon spokes of equal mass.

Titanium doesn't have any real vibration damping properties. I suspect people often conflate lower stiffness with increased vibration damping.
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: radrick_91 on April 03, 2026, 04:59:49 AM
Slightly less stiff than steel spokes of equal mass. Significantly less stiff than carbon spokes of equal mass.

Titanium doesn't have any real vibration damping properties. I suspect people often conflate lower stiffness with increased vibration damping.

But don't forget the style factor of titanium spokes. Gain some watts  8)
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: acwj8rwh on April 28, 2026, 03:06:16 PM
Collected some real-world measurements from this thread and some insta posts for reference. Casing width from BRR. All tires mounted on the XMCS rims.

Hier ist die aktualisierte Tabelle. Ich habe den Michelin Pro 5 in 40mm an der richtigen Position (aufsteigend nach gemessener Breite/WAM) eingefügt.

Tire
  ETRTO 
  Casing width \mm 
  Measured width \mm 
Source
Michelin Pro 5 TLR 35
35-622
89
40
acwj8rwh
Schwalbe G-One RS Pro 40
40-622
106
42.3
acwj8rwh
Michelin Pro 5 40
40-622
?
43.2
Torsten Frank
Tufo Gravel Thundero 40
40-622
100
43.3
radrick_91
Tufo Gravel Thundero 44
44-622
114
47.6
radrick_91
Schwalbe G-One RX Pro 45
45-622
115
47
acwj8rwh
Schwalbe G-One RS Pro 45
45-622
118
49
IG iamzwosh
Hutchinson Caracal Race TLR 45
45-622
121
50
Rolle2k
Tufo Gravel Thundero 48
48-622
123
51.3
Bambelbie
Schwalbe Thunder Burt 2.1
54-622
135
54
darario
Schwalbe Thunder Burt 2.25
57-622
147
57.8
Torsten Frank




Happy to add more data points if anyone has measured values to share.

Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: Rolle2k on April 28, 2026, 04:30:45 PM
Nic
Collected some real-world measurements from this thread and some insta posts for reference. Casing width from BRR. All tires mounted on the XMCS rims.

TireETRTO
Casing width \mm
Measured width \mm
Michelin Pro 5 TLR 3535-622
89
40
Tufo Gravel Thundero 4040-622
100
43.3
Tufo Gravel Thundero 4444-622
114
47.6
Tufo Gravel Thundero 4848-622
123
51.3
Schwalbe Thunder Burt 2.154-622
135
54
Schwalbe Thunder Burt 2.2557-622
147
57.8


Happy to add more data points if anyone has measured values to share.



Nice work!
My Caracal Race TLR 45-622 does measure almost exactly 50mm on these rims. (front wheel slightly above, rear wheel slightly below 50mm), But they are slightly above 2mm oversized on 25mm rims already.
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: dennis_the_menace on June 01, 2026, 06:59:37 AM
Hello,

my name is Dennis and I've been a silent reader of this forum for quite some time. I wanted to share my gravel equipped with the wheelset without titanium spokes.
I always liked the ZIPP XPLR because of their internalrim width, but I preferred having hooked rims.

I'm currently running Speedero 44 on the rear, which measures 47mm on these rims. Up front I used a Thundero 44, which also measured 47mm. Unfortunately, after about 200km, I had to replace it due to a 1,5cm cut. I switched to a caracal race 45, which measures 50mm.

Over the last 1,5 weeks, I've ridden around 800km with thes wheelset, and I'm absolutely happy with them. The freehub is pleasantly loud (52T), and setting up tubeless was even easier than on my previous rims with a 27mm iw. The wheelset weighs by the way 1,371g.

The order experience was excellent as well. Peter always replied to my questions in a friendly and timely manner, and you really feel like a valued premium customer.
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: Kool on June 01, 2026, 09:52:04 AM
My wheels are on the way to me :)

I ordered the titanium spoked set, without spoke holes, no paint.

Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: jstrawks on July 02, 2026, 02:55:15 PM
Is it just me? I can't select any options on any wheelset on the XMCS website in ant browser.
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: smichal on July 09, 2026, 03:17:24 AM
Same here :(

Is it just me? I can't select any options on any wheelset on the XMCS website in ant browser.
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: zealot128 on July 09, 2026, 03:39:24 AM
Same here :(

Is it just me? I can't select any options on any wheelset on the XMCS website in ant browser.

Hah, I also noticed that at a time, tried again, and disabled uBlock Origin (ad-Block addon), and now I can select stuff. The shop's Javascript was blocked by the Ad-Blocker.
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: smichal on July 09, 2026, 05:57:29 AM
yes, it was ublock origin! thx mate :]

Hah, I also noticed that at a time, tried again, and disabled uBlock Origin (ad-Block addon), and now I can select stuff. The shop's Javascript was blocked by the Ad-Blocker.
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: johnny on July 21, 2026, 06:53:20 AM
Yes. It‘s 54 mm.
Hi Darario,
thanks!
and it fits fine with the tantan gr201?
thank you!
regards Johnny
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: patliean1 on August 13, 2026, 10:52:14 AM
Late to the party. I've been running these wheels paired with Vittoria Corsa Pro Control 38c for the past two months. The tires stretch to exactly 40mm at the rim.

The wheels are fantastic. Out on the road there really isn't any discernible difference (at speed) compared to a traditional road bike. Nothing that would make or break getting dropped from a fast group ride. But you have the ability to literally plow over bad pavement without a second thought.

What you lose marginally in both acceleration and punchy false flats, you gain significantly in rolling resistance and overall ride comfort.
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: Bobinski on August 13, 2026, 12:07:14 PM
Thats very nice!

I went with c xrays on the same wheelset. They are on their way so review to follow. Loved my old 28mm corsa's so may try these or the GP500 in 35mm
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: patliean1 on August 13, 2026, 03:26:24 PM
Loved my old 28mm corsa's so may try these or the GP500 in 35mm

Funny I have a set of Corsa Pros in 28c that have sat in storage for almost four years. And after only about 30 miles of use. They were comfortable but never actually felt "fast." And they felt sloppy when cornering in crits. I hated them so much that I immediately went back to GP5000s.

These Corsa Pro Controls are super comfy, I can't deny that. But I still have to PTSD from my original Corsa Pros. If Continental ever make a 38 or 40c GP5000 STR I am immediately jumping ship!
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: stalkersk on August 14, 2026, 07:16:27 AM
The 35mm GP5000 S TR will fit same as Goodyear Vectir R XPLR, looking at BRR measurement, the GP5000 has even wider thread and is taller :-D So no need to wait for 40mm.
Title: Re: XM Carbonspeed Ultra-Wide Gravel Wheelset with Titanium Spokes
Post by: patliean1 on August 14, 2026, 08:24:46 AM
The 35mm GP5000 S TR will fit same as Goodyear Vectir R XPLR, looking at BRR measurement, the GP5000 has even wider thread and is taller :-D So no need to wait for 40mm.

I'm gonna experiment with different tires, as I do think there are still some margins to be gained over my Corsa Pro Controls.

Michelin Pro 5 in 40c come to mind specifically.