Xiamen Carbon Speed 10 years anniversary special promotion

[toxin]

I don't like these super wide gravel rims. All you do is expose the rim to damage from rocks and such. It doesn't even do anything for aero because the edge of the rim is where airflow coming off an off-road tyre is absolutely demolished. If you're gonna make a wide rim, it's better to do it like DT Swiss (Swiss side) and Parcours, where the rim edge is relatively narrow, and then the rim bulges out closer to the middle. Safer and more aero.

[Usain]

Maybe a stupid question, but where do I order? Can i just use the website: http://www.xmcarbonspeed.cc/ ?

[Sander2177]

Maybe a stupid question, but where do I order? Can i just use the website: http://www.xmcarbonspeed.cc/ ?

Peter
WhatsApp
+86 182 5080 8148

Whereever you are in the world see how far ahead or behind time wise China is from you (+7hrs from Uk) and then message. Woukd also messsge during business hours Monday to Friday.

[Rolle2k]

Depending on price and weight these will certainly be my next set of gravel wheels. Have been eyeballing the Nextie SGV, but have been not ordered since i emailed Peter about these a while ago, so i did know they were on track for this season. Hopefully they will match Nextie weight wise, and as usually have great price like xmcarbonspeed usually does.
I would say there is no problem at all with damaged sidewalls if you go >45mm width, and these are also hooked compared to 303 XPLR. I think smaller width will also work fine - but tire manufacturers have to design the tires for these kind of rims for that. (Smaller tire casing width lay flat, but wider contact patch - if 40mm should measure 40mm that is) I would even think it may introduce lighter tires for same width because of that.

[Nkearb]

I don't like these super wide gravel rims. All you do is expose the rim to damage from rocks and such. It doesn't even do anything for aero because the edge of the rim is where airflow coming off an off-road tyre is absolutely demolished. If you're gonna make a wide rim, it's better to do it like DT Swiss (Swiss side) and Parcours, where the rim edge is relatively narrow, and then the rim bulges out closer to the middle. Safer and more aero.

If you want to protect the rim edge with the tire, then the tire needs to be wider than the rim at the rim edge. Now your tire+rim has an hourglass shape. So air flow can  separate at the tire. And the space between the widest point of the tire and widest point of the rim becomes a void air must fill and will increase drag

[patliean1]

Reason those new Goodyear XPLR tires have been a failure in tandem with Zipp's XPLR gravel wheels is simply because the tires aren't wide enough. Way too many side cuts since the side walls are exposed. This is according to conversations I've had with Sram/Zipp employees, and I'm certain Sram won't admit this publicly.

40/45c tires on a (HOOKLESS) 40mm external, 32mm internal wheel for gravel is asking for trouble. It doesn't even follow the ETRTO standards. Although I don't ever follow this myself LoL

A 32mm internal wheel "should" be using a 58 - 65c tire. But yeah no is gonna do that. For Peter's new gravel wheels I would not run anything smaller than a 2.0 MTB. Better hope ya gravel frame can clear that.

[Uberflo]

I urged Peter to design a new Gravel frameset next with at least 700x57 tyre clearance with at least 46T chainring. 

[angry-runner]

Does anyone know if XMC is already offering an integrated handlebar? Last time I heard about it it was on their plans

[Pistonbroke]

Out of interest, what is the lightest set of wheels xmcs can do?
I watched pandapodium the other day on YouTube at the bike show saying they would be selling a 900g ish wheelset soon.
#weightweenieatheart

ETA been using the d40/33 t1100 as gravel bike wheels for the last five months and they've been brilliant, thanks Peter!

[toxin]

If you want to protect the rim edge with the tire, then the tire needs to be wider than the rim at the rim edge. Now your tire+rim has an hourglass shape. So air flow can  separate at the tire. And the space between the widest point of the tire and widest point of the rim becomes a void air must fill and will increase drag

It's an off road tyre, airflow is already separated because the off road tyre profile chopped it all up. The negative space creating a negative pressure area behind the tyre is actually a positive because it pulls that turbulent airflow back towards the rim so it can more easily fill the wake behind the rim.

[Rolle2k]

Got my D50CU-33 t1100 setup with 24 CX-ray spokes per wheel last week. My set Weights 1276gr for both wheels. Received tubeless tape, valves and two GP5000S TR 32c tires, which i seated today and pumped up to 5 bars. Both of them measure around 33.7-34.1mm so actually almost 1mm narrower than i expected. Glad i didnt go for 30c which i was thinking about.
Now i just need my new Chaser ultralight discs, and i will take them for a ride.
Looks better balanced and stiffer than my Elitewheels Edge Gravel 45mm deep 31mm wide (24mm internal width), while also being about 100gr lighter. Fun times.
Will probably get a set of the new ultra wide gravel wheels as soon as they are available also!

[Sander2177]

Out of interest, what is the lightest set of wheels xmcs can do?
I watched pandapodium the other day on YouTube at the bike show saying they would be selling a 900g ish wheelset soon.
#weightweenieatheart

ETA been using the d40/33 t1100 as gravel bike wheels for the last five months and they've been brilliant, thanks Peter!

Seen that wheelset 884.8grams
27mm Rims with 23mm inner width.

I'm looking at another set of wheels 45/50 wit some new  H-Works hubs due for release  soon 20-20Hole hubs 227grams.
These are 90kg weigh limit will be estimated 1011grams


I will also message peter on this as well 

[kubackje]

I don't like these super wide gravel rims. All you do is expose the rim to damage from rocks and such. It doesn't even do anything for aero because the edge of the rim is where airflow coming off an off-road tyre is absolutely demolished. If you're gonna make a wide rim, it's better to do it like DT Swiss (Swiss side) and Parcours, where the rim edge is relatively narrow, and then the rim bulges out closer to the middle. Safer and more aero.

I agree on this one. there are a lot of topics on weight weenies and trainer road forums on why those super wide rims are not a good idea for gravel and even MTB. Respected users and testers like DC rainmaker or go lama had a lot of problems with those exposed sidewalls. From my knowledge 28 internal is optimal for wide tires.

[kubackje]

Depending on price and weight these will certainly be my next set of gravel wheels. Have been eyeballing the Nextie SGV, but have been not ordered since i emailed Peter about these a while ago, so i did know they were on track for this season. Hopefully they will match Nextie weight wise, and as usually have great price like xmcarbonspeed usually does.
I would say there is no problem at all with damaged sidewalls if you go >45mm width, and these are also hooked compared to 303 XPLR. I think smaller width will also work fine - but tire manufacturers have to design the tires for these kind of rims for that. (Smaller tire casing width lay flat, but wider contact patch - if 40mm should measure 40mm that is) I would even think it may introduce lighter tires for same width because of that.

Those wide rims are a known problem in MTB for years now, resulted in many tire models with stronger and stiffer causing which negatively impacts rolling resistance.

[Hubertus90]

I pulled the trigger also.

For me a combo of the 50 33 and 60 31 paintless 1100, without drill holes in the rim bed, with 3.8 carbon spokes.

Keep you updated, estimated delivery mid July.