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Re: Interesting Aliexpress finds! - good deals, interesting stuff, new products etc!
Sadly, Shimano's cranks aren't bullet proof either
Yes, since Ultegra 6800 days there are reports of cranks cracking. I will still bet on Shimano v/s anything comparable on Aliex though. My R6800 and R8000 cranks have been fine but I am not a pro putting down massive watts either.

Two things you would never see me order from ali... carbon cranks and carbon cockpits. WAY too many horror stories for such little benefits..

Helmets too, IMO. However, admittedly I haven't seen any bad reports about helmets on Aliex...its just personal preference.

August 03, 2023, 03:11:28 PM
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Re: Carbonda fm936 Thoughts Excellent Service!

I've been riding my L standard frame for two and a half year pretty hard and some weeks ago it feel different.
It felt like something was loose in the backend.
After inspection I found a crack in the chain stay on the right side at the smallest part near the attached chrome part (Chain ring protection)
Contacted Wing at Carbonda and got an reply in a day.

Carbonda sent a new triangle for free after some discussions and that was not what I've expected from them!
Makes me convinced that they are a serious company with great customer care in focus.


August 09, 2023, 03:06:55 AM
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Re: LTWOO RX hydro sets Update to my previous post. I built up the bike and have gotten a bit of time in on it - not enough for any real judgements but enough for first impressions.

Build notes:
  • The brake bleeding process is exactly as depicted in the official bleed guide video on youtube. I used the same EZmtb brake bleed kit that Trace Velo used, which has the adapter needed to screw into the caliper. The brake lines and brifter bodies came filled with light blue oil, which I flushed out and replaced with shimano mineral oil. Really easy bleed, no more difficult than any of the shimano brakes I've done. I did unscrew the free throw adjustment screw before bleeding; after the bleed was done the brakes were firm but needed to be pulled back quite far to make contact with the rotor, and screwing in the free throw screw about 3 turns reduced the throw a lot while not negatively affecting rotor/pad clearance as far as I could tell (no rubbing).
  • I used a housing ferrule with a plastic sheath to protect from the sharp edge on the cable exit of the rear derailleur as depicted in tsneidin's post previously. The shift indexing is VERY sensitive to cable tension; a quarter turn of the barrel adjuster yields very noticeable differences in shift performance.
  • The b adjustment screw on the rear derailleur is almost useless. I'm using a 46 tooth cassette and have the b screw backed out almost all the way.
  • The clutch isn't as strong as the ones on Deore or GRX rear derailleurs, but still seems adequate for a 1x setup. It's certainly stronger than the first gen Sensah SRX clutch which dropped my chain quite a few times.

Some impressions from the brief amount of time I've put on this groupset:
  • The brifters are quite petite. I have average sized hands and if the brifters were any smaller I wouldn't be able to get my entire palm on the top of the hoods. The shape is quite nice though, and there's support in the brifter body everywhere there's contact with the hand or fingers; overall quite comfortable.
  • The braking is excellent, easily on par with the 105 disc brakes on my other bikes. I haven't experienced any rattling from the brake piston retaining clip either.
  • The force required to downshift is greater than upshifting, and I often have to use 2 fingers to comfortably downshift. The downshift lever/paddle has a moderately thin section near its top and I'll be keeping an eye on that section for any signs of fatigue.
  • The ability to dump 3 gears up + 4 gears down is amazing, I use it quite a lot when slowing down/speeding up or cresting a hill. Probably my favorite feature to be honest. It is hard to dump all 4 gears with the thumb shifter from the top of the hoods, much easier to do in the drops, but I can get 3 gears reliably which is enough for me.
  • I'm temporarily using flared bars (~16 degrees of flare) until the actual bars I ordered arrive. The brifters are ok at an angle but I think they'll be more comfortable in a level, non-flared position. Something to think about when choosing bars, as this is nominally a gravel groupset and all gravel bikes seem to come with flared bars these days...
  • The compression nuts on the brake calipers seem to be anodized so I don't think they'll be susceptible to the corrosion problems that Trace Velo had. I do live in a much drier environment, but I plan on riding this bike quite a bit in the winter so it is a concern.

I probably won't update again until I've put a lot of miles on this setup, or until an issue arises. I got this groupset hoping it would be a fairly cheap, moderately high-performance, reliable groupset for my commuter/all-around bike, and it seems like it'll fulfill that role admirably.

Photo of the bike, with fit not yet dialed in:

August 17, 2023, 07:12:06 PM
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Re: Newish ZEROING crankset - Ingrid clone
Depends on the crankset. The Racework carbon crankset is about 377g and the Goldix/Zeroing crankset w/hollowed out crank arms is about 475-480g. In order to match those weights, you have to go Dura Ace of SRAM Red at a significantly higher cost.

I did some digging, found weight for non-Shimano spindles - 160g for steel, 90mm for alloy. 70 grams savings is less than  0.1% of total system weight (typical accuracy of digital scales is 0.1%). Comprimising the durability of one of the highest stress areas for literally meaningless gains is not what I'd recommend.

August 30, 2023, 01:49:33 AM
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Re: Groupset News
Will those shift buttons also appear on the ERX?

I remember awhile back you posted a website detailing LTwoo's financial investments. Unfortunately that site has a regional lockout now, but I found it interesting one of LTwoo's investors were US based.

You can try this site instead

No American shareholders to my knowledge, but some Chinese investors have significant global presence and financial heft (Hillhouse)

Those shift buttons and calipers will absolutely make their way to eRX/eR9 as running changes, they're a small company that can't afford to maintain many SKUs. Same reason why the mechanical hydraulic brifters are built so cheaply: the same shifter bodies and plastic gear levers are shared all the way from R5 9s to RX 12s.

September 06, 2023, 10:13:57 PM
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Re: Groupset News
Just spotted Sensah Empire HRD 11 speed for sale on Aliexpress. Price is $249 for shifters, disc brake calipers, and derailleurs. Looks promising!

https://www.aliexpress.us/item/3256805841249421.html

Thanks for that - I've done a little groupset comparison for anyone interested in the current state of the market for hydraulic groupsets. I have used official store prices for Ltwoo and Sensah. All items are shifters, brakes and derailleurs unless indicated otherwise. All prices include postage where relevant (to Australia - not sure how it differs for other markets).

Mechanical

Code: [Select]
| Groupset Name          | USD  | Link                                                      |
|------------------------|------|-----------------------------------------------------------|
| Ltwoo R7               | 240  | https://www.aliexpress.com/item/1005005708638779.html     |
| Ltwoo R9               | 265  | https://www.aliexpress.com/item/1005005097651417.html     |
| Ltwoo RX               | 287  | https://www.aliexpress.com/item/1005005035653680.html     |
|------------------------|------|-----------------------------------------------------------|
| Sensah Empire HRD      | 247  | https://www.aliexpress.com/item/1005006027398876.html     |
| Sensah Empire Pro HRD  | 297  | https://www.aliexpress.com/item/1005005961758310.html     |
|------------------------|------|-----------------------------------------------------------|
| Shimano Tiagra 4700    | 306  | https://www.aliexpress.com/item/1005005767481889.html     |
| Shimano 105 R7020      | 430  | https://www.aliexpress.com/item/1005003723174953.html     |
| Shimano Ultegra R8020  | 530  | https://www.aliexpress.com/item/1005003723174953.html     |

Electronic:

Code: [Select]
| Groupset Name         | USD  | Link                                                                                                                   | Notes          |
|-----------------------|------|------------------------------------------------------------------------------------------------------------------------|----------------|
| Ltwoo ER9             | 514  | https://www.aliexpress.com/item/1005005666489670.html                                                                  |                |
| Ltwoo ERX             | 656  | https://www.aliexpress.com/item/1005005666489670.html                                                                  |                |
|-----------------------|------|------------------------------------------------------------------------------------------------------------------------|----------------|
| Shimano 105 R7170     | 767  | https://www.aliexpress.com/item/1005005766195381.html                                                                  |                |
| Shimano Ultegra R8170 | 1435 | https://r2-bike.com/SHIMANO-Ultegra-Di2-R8170-Complete-Group-2x12-Crank-Length-1725-mm-50-34T-SPECIAL-OFFER            | Full set       |
|-----------------------|------|------------------------------------------------------------------------------------------------------------------------|----------------|
| Sram Rival 2x         | 697  | https://r2-bike.com/SRAM-Rival-eTap-AXS-Road-Disc-HRD-Flat-Mount-Road-Upgrade-Kit-2x12                                 |                |
| Sram Force D1 2x      | 742  | https://r2-bike.com/SRAM-Force-eTap-AXS-Road-Disc-HRD-Flat-Mount-Upgrade-Kit-2-speed                                   | With rotor     |


Gravel:
Code: [Select]
| Groupset Name         | USD  | Link                                                                                                                   | Notes           |
|-----------------------|------|------------------------------------------------------------------------------------------------------------------------|-----------------|
| Ltwoo GR7 1x10        | 208  | https://www.aliexpress.com/item/1005005754630103.html                                                                  |                 |
| Ltwoo GR9 1x11        | 265  | https://www.aliexpress.com/item/1005005148057429.html                                                                  |                 |
| Ltwoo GRT 1x12        | 287  | https://www.aliexpress.com/item/1005005048297285.html                                                                  |                 |
|-----------------------|------|------------------------------------------------------------------------------------------------------------------------|-----------------|
| SRAM Apex XPLR 1x12   | 554  | Multiple links, see notes                                                                                              | Parts separate  |
| SRAM Rival XPLR 1x12  | 770  | https://r2-bike.com/SRAM-Mullet-Rival-eTap-GX-Eagle-AXS-Gravel-Upgrade-Kit_1                                           |                 |
|-----------------------|------|------------------------------------------------------------------------------------------------------------------------|-----------------|
| Shimano GRX 400 2x10  | 346  | https://www.aliexpress.com/item/1005005354064020.html                                                                  |                 |
| Shimano GRX 810 1x11  | 789  | https://r2-bike.com/SHIMANO-GRX-Gravel-Group-RX810-Hydraulic-Disc-Brakes-1x11-42-Teeth                                 | Full set        |
| Shimano GRX 820 1x12  | 1122 | https://r2-bike.com/SHIMANO-GRX-820-Complete-Group-1x12-Crank-1725-mm-42-Teeth                                         | Full set        |



September 09, 2023, 11:41:08 PM
1
Re: Carbonda FM909 Here is my bling build !

Finally in the blue I wanted...

With the XX transmission + blip box + multi-click blips, this time without 3D printing needs.
Click right for a harder gear, click left for an easier gear, when both are clicked it's for the seatpost.
Unfortunately the wireless blips(no more expensive blip box needed) do not have yet the option/firmware? for the seatpost action.

The 2024 SID fork 110mm and SIDluxe shock, they have 3 positions now.
I was about to start the build, when the 2024 models arrived in the ... matching color, so I returned both to r2-bike, and ordered these instead.

Lightbicyle XC924 wheels, with aero carbon spokes at 1035g  :o

I took off the Piccola brakes from my FM936(replacing them by ONIRII ones)

One special mention for Fire Spider https://www.aliexpress.com/store/1100268111 for the bar, excellent product and great contact with the seller.
Fire Spider are the higher end products of Toseek.
It has all the holes to pass the cables, hoses with internal routing(I know top bearings rust... but it's so cute  ::))
I'll order a longer front hose to make it internal too, and drill the fork steerer.

I did 2 rides of about 70km so far.
With impossible objectivity  8)... It feels much faster and more nimble than my 120mm FM936
Especially when climbing. Love it !!

September 10, 2023, 11:54:05 AM
1
Re: LTWOO RX hydro sets I've recently built a V-BR099 with LTWOO RX12.

I was most impressed by the shifters and brakes. The quality is really impressive for the money. The brakes work fine. Everything is super straightforward. Bleeding was easy (once you realize that you need to back off the little reach adjust grub screw in the lever completely in order for the master cylinder to go into the zero position and not block the oil flow).
I like that the FD has its own cable stop and cable tension adjustment mechanism. That makes a lot of sense particularly for fully internally routed frames. You can just run the housing all the way to the FD and adjust the cable tension there. No need for stupid cable stop designs in the frame.

I was least impressed by the RD. The whole thing looks just a bit cheap. The derailleur cage is made of carbon on the outside (which honestly seems to be more for looks than for stiffness) while the inside is made of some sort of polymer (which arrived slightly bent and I had to bend it back into shape - the seller promised to send a spare derailleur cage).
The cable routing is just borderline stupid. Like other people have said already, the cable has to make a super tight turn from the barrel adjuster to where it is clamped down on the RD parallelogram. Therefore, it severely rubs agains the RD housing. I used some liner between barrel adjuster and the clamping screw to alleviate the problem. But still, it's just a very bad design.
It shifts fine. Not stellar but fine.
I wasn't able to get it noise free in the stand. Paired with a ZTTO 11-34 12sp cassette, there was always a clicky gear on either end of the cassette. Curiously though, on the road when shifting under load it is not an issue. So that's fine, I guess.

Lastly, the brifters are obviously Campagnolo copies internally. I'm running the original 12sp Campagnolo Record on my rim brake Velobuild VB-R218 which uses the same kind of mechanism (Campagnolo Ultra Shift). I can say that the LTWOO thumb paddle requires significantly more force and is harder to shift accurately and not overshift compared to Campag. Time will tell if with further use the action gets easier.
Campag are more or less producing this tech ever since their first ergopower 8sp shifters came out so I guess they had 30+ years to perfect it.

For the money, I think it's a great groupset but IMO especially the RD can be improved. If the cable pull ratio is identical, I'd probably put a 12sp 105 derailleur on there and be done with it.

September 19, 2023, 01:19:52 AM
1
Re: Carbonda FM909 It is half a kilo lighter. This can help in that feeling, especially in the climbs.

Yes the wheels seems easier to accelerate, but mostly I feel them much stiffer.
I did an enduro week with my 936 and SID 120mm, not sure why but I guess I wouldn't go with the 110mm.
In my usual trails, which are XC like, I didn't feel I lost anything with the smaller fork.

I didn't investigate more, but the top of the head tube is vertically 25mm lower from the ground.
This may explain why I felt initially being more over the bike with the 909, than in the bike with the 936.

Are you able to know how this feeling is influenced by the differents components vs your 936, especially the wheels which are probably much more faster?
Can you spot the difference in the suspension behaviour between 909 and 936?

September 21, 2023, 12:11:10 AM
1
Re: Carbonda fm936 Thoughts
I’m thinking of retiring my 936. I have 1500 miles on it. The drive side chainstay is failing (due to a lame attempt to ride through a cinder block garden) and the drivetrain is 11sp (same cassette for all 1500miles, one chain swap).

Here’s what I’m thinking so that I don’t trigger the wife alarm:
1. new frame that is T Type compatible
2. New T Type drivetrain
3. Swap wheels, suspension, brakes (sus just got the 200hr service 500 miles ago)
4. Ride like a stole it

Anyone else retire their 936? What did you do?

Nope...I did 15000km on it and still loving it.
I still don't think there are better frames out there for the same price...maybe the 909 which has uds(isn't it?) And two bottle option.
A new frame will definitely trigger any wife...replacing only the rear will probably not

October 13, 2023, 12:15:24 AM
1