Just installed GEX on my new Waltly titanium minivelo. Using a 13 speed 11-45 cassette from Sunshine. Setup was relatively painless, and shifting is good so far. Hope it continues this way.

The proprietary interface as the only option on the 515 isn't ideal (505 had a few options). TEO cranks are nice... but limited to DUB. If they made one additional SKU of the 515 with an Easton Cinch interface I'd be happier.

I don't understand why they went proprietary only with the 515. It makes no sense to me. I've got a 505 with the 3 bolt GXP mount and it makes switching cranks easy.

I'm still likely to buy a Geoid PM500 for my next bike since it seems to be nearly identical to a 505 or 515 at a considerably lower price, proprietary interface or no.  At least I know the Senicx cranks it comes with are decent, since I've got them on two of my bikes and they work just fine. Any chance of a review from you in the next couple of months? I'd love to know your thoughts on it before laying my money down on it.

This looks great. Was planning on a P515 for an upcoming bike build, but since this is basically a P505 (which I have had good experience with) and costs 2/3 of what a P515 does, I think I might go this direction instead.

First inquired with Waltly at the end of January. Dealt with Sumi. She was very responsive and friendly. Submitted my plans and made down payment in early February. Drawings were approved a few days later. Just received my frame, along with a carbon fork and titanium seatpost and stem last weekend and put it together. Some pics of the build process:

Frame and parts


Build pics






Finished product:






Total price came out to about US$1300, including frame, frame logos, fork, FSA headset, titanium stem, titanium seatpost, and Chinese domestic shipping. Build went relatively smoothly, though installing the internal cabling was a pain and I had to bodge the front derailleur cable run a bit because I didn't notice on my original drawing that the front derailleur cable hole in the frame was only suitable for Di2 cabling and certainly not for compressionless cable housing. Weight including pedals came to about 9.3kg.

Parts used for the build all came from Taobao，including:
- PRO Vibe Aero handlebar
- Giant Fleet SL saddle
- Giant bar tape
- Ultegra R8000 shifters and derailleurs
- 105 11-32 cassette, 105 chain
- Stone 50-34 chainrings
- Sigeyi AXO power meter (110 BCD) and crank
- Shimano SPD-M520 pedals
- Onirii cable-actuated hydraulic disk brakes
- Jagwire cables, housings, and 160mm centre lock disk rotors
- Timibike handbuild 50mm carbon wheels with DT Swiss DT350 hubs

Super satisfied with the result. The frame and sandblasted logos looks great. Bike is a perfect fit for me (obviously!) and feels great to ride - super quick, too, as I went for a 25km ride this morning and averaged 34km/h! Can't wait to put more distance on it.

Sigeyi is the best Chinese power meter brand but don't get the Zrace/Sigeyi crankset, the arms have a design flaw where they rub against the spider eventually wearing through and allowing moisture to seep in. Xcadey power meters are unreliable but their crankset is imo the best constructed. The first batch of the new Magene QED crankset had FD clearance issues and needed to be recalled while their old crankset was a bit flexy.

I wanted to pair the Xcadey arms with a Sigeyi spider at first but the arms have this proprietary 5-bolt pattern (SRAM 3-bolt but with 2 extra bolts), not worth the risk trying to install it anyways so I just dropped the idea.

I am looking at the Sigeyi power meter for a new build that I'll be doing in the spring. It seems they have what I want - 24mm axle, SRAM 3 bolt connection, 130BCD for running a 1x ring. And it sounds like GPLama had a good experience with them, so that's good too. I do like the looks of the Magene, but I don't want one where I can't choose my own cranks and chainring, so that's out.

Just put my down payment on a road frame with carbon fork from Waltly. Prices have gone up quite a bit (they quoted me 8120RMB total for frame, fork, and domestic Chinese shipping) but it's still cheaper than the aluminum Specialized Allez Sprint frame I was looking at. Going with basically Cannondale Synapse design / geometry. They said it'll be done in about 2 months after drawings are finalized. Can't wait to start the process.