Hey,

I need to bleed the GEX but somehow I lost the bleeding kit (or there was none?).

I do have those Aliexpress universal bleed kits and a SRAM Kit tough.
Does anyone know what kind of adapter fits the GEX?
As the hood is extremely sturdy its kind of impossible to try the ones I have without potentially brakting the threading :/

Hi everyone!

I'm having an issue with my Wheeltop EDS GeX Gravel 1x12 and wanted to ask if anyone has experienced something similar or knows of a possible solution.

Unfortunately, Wheeltop hasn't been very helpful so far. I reported the problem with videos and a detailed description, but apart from telling me that the one-year warranty had expired, there was no technical analysis, troubleshooting, or offer of a replacement shifter. In the end, I was basically told to buy a new groupset.

The problem is with the right shifter:

Both buttons are no longer detected separately.
I can change the button assignment in the app, but both buttons always perform the function assigned to the small button.
Example: large = "+", small = "−" → both shift "+".
If I swap the assignment: large = "−", small = "+" → both shift "−".
The shifter itself is detected normally in the app.
The current gear position is also displayed correctly.
Shifting via the app works normally in both directions.

I have already tried:

Replacing both shifter batteries (3.3 V)
Updating the firmware
Re-pairing the shifters
Resetting the system
Resetting and testing the button assignments several times

Does anyone have any idea what could be causing this? Maybe someone has experienced a similar problem or knows whether the shifter can be reset/relearned separately, or whether this sounds more like a hardware failure?

Thanks!

    I bought my Wheeltop EDS GeX Gravel 1x12 in July 2025 via AliExpress. Until the failure, I was actually quite happy with the groupset.

    At the beginning of August 2026, the right shifter failed. The two buttons are no longer recognized separately. No matter how I assign them in the app, both buttons always perform the same function. The shifter is still detected correctly, the batteries are new, the firmware is up to date, I re-paired everything, performed a reset. The problem remains fully reproducible. I also sent Wheeltop videos showing the problem.

    I contacted Wheeltop but the response was simply: warranty expired. Yes, but by like 5 days. No exceptions, no goodwill gestures, they still didn't even attempt to analyze the technical problem.

    No proper troubleshooting, no further assistance, no offer of a replacement shifter. Basically: buy a new groupset.

    I actually liked the groupset itself. But what's the point of an affordable electronic groupset if a single shifter fails after just over a year and the manufacturer shows no interest in helping to resolve the problem?

    Based on this experience, I cannot recommend buying a Wheeltop groupset. I would rather spend more on Shimano or SRAM and have proper spare parts availability and customer support.

    It's a shame, because I actually found the product concept very interesting.

Quote from: Beij on August 26, 2025, 12:34:34 PM
I'm having an issue installing OX 2 rear derailleur.  Specifically the chain doesn't appear to run over the rear pully correctly and rubs against the top of the cage when pedaling.  I assume I am doing something wrong - can anyone offer some advice?  For reference the chain is a Chinese made 12 speed that was working fine previously with a GX Transmission rear derailleur.

Narrow-wide pulley? Make sure to fit the pulley correctly to the inner and outer links of your chain.
Had the same issues while installing my GeX derailleur before realizing that I was stupid

What frame did you end up with?

Have a look at the Carbonda 1136.
It fits 35mm tires measured and has a designated Endurace Geometry.

My gf is very happy with hers, bought like 1.5yrs ago and ridden around 15.000 by now. She is doing ultra races and every day riding.
She prefers the frame over the Canyon Endurace she had before.

I ordered a frameset for myself, its in the making right now.

Just ask if it's possible?

I also considered to Airwulf, but after easing about some quality problems and headset issues, I went for the 1136 yesterday.
Carbonda always had very good quality, never had any issues with them. it's gonna be my 4rth Carbonda frame.

Quote from: tyler.botts on October 28, 2024, 10:59:03 AM


Hey!

I want to pull the trigger on this 1136 but i'm a tad skeptical on the aero properties of the frame and the matte black pictures on carbondas website hide so much detail.

Does the fram actually have an aero build like alot of the modern road race bikes out now? Hard to tell but does the head tube have an hour glass shape and are the fork blades aero? Is the seat post completly round ior does it have an elongated oval shape for aero?

I really want my next bike to actually be an aero upgrade so just trying to enusre this has some of the properties of newer aero frames before commintting. Thanks for the help!!

I wouldnt say its super aero, but it certainly has some aero aspects. Made some pics of a frame I have access to.
Head tube has hourglass, shape, the fork blades are also aero. seat post is round. Hope this helps.

Another question, what size would you guys recommend for a rider with 186cm size and 91cm inseam? Focus on relaxed riding, ultracycling races.
I'm torn between L and XL...

(what a shitty software this forum has )

Are you also offering Wheels with Dynamo?

That should be the Vitus ZX 1  Evo.

https://vitusbikes.com/collections/zx1/products/vitus-zx-1-evo-frameset-07e7

Geotabels are slightly off, but to my knowledge its the same.

Quote from: Hillhater on September 19, 2024, 06:34:43 AM
I found a frame from tantan cycling, which seems identical with RD301-D.
http://tantancycling.com/index.php?_m=mod_product&_a=view&p_id=1146

So this frame seems open mold frame..

Nice find! Maybe they can provide large frames, unlike Longteng...

Quote from: Serge_K on September 13, 2024, 04:07:09 AM
Yeah and all his arguments are 100% empty, baseless statements and promises.
It's like a crack user doing tricks on skid row telling you he could be Elon Musk or some retarded $hit like this.
You willingly bought from a guy like this? Why? He literally answered none of my questions convincingly. Not one.

I can relate.
Answers are unprecise, not to the point and the crappy google translate wont help either.
Even I asked him like a lot of times and explaining, he was not able to make clear if or if not his shipping includes taxes and how much shipping is to Europe. Hm.

Quote from: OralMaster on September 05, 2024, 12:48:25 PM
i just managed to retrieve the photos that seller took before shipping out my frame, and for me to pay the balance to him lol...

Looks really neat. Just out of curiosity, would be interesseting to see a legit OSTRO from the inside to compare the looks. That checkerboard pattern looks special, have never seen it on the inside of a frame before.