Joe from China Cycling explained in a video from a trade show last year that you need UDH dropouts because they use a proprietary (narrower) UDH hanger. This way they gain additional cog space without the chainline issues which simply moving the cogs closer to the spokes would pose.

It's basically how the XPLR full mount derailleurs attach but without the outer plate. Which begs the question of how sturdy the hanger is going to be.


The range is a bit small indeed.

I'm currently running 1x13 XPLR on the road. 46X10-46 for instance is slightly bigger in range than 2x 50/34 X 11-34.

I was afraid of the 13-15 jump but I didn't notice it so far. But then again I've just moved to a very hilly region so I'm now constantly shifting across the cassette anyway.

For off-road use I'd be looking for something like 11-50 if they need to keep the 11 cog.


Cog spacing still isn't ideal. Without a 10t cog the 13-15 jump moves further into high speed territory so a 14t cog would be appreciated. 32-36 is a uselessly small relative jump in the low speed realm, 24-28 a big one in the middle. All in all you don't gain anything meaningful from the additional cog vs. the 13sp XPLR cassette.
Apart from lower price maybe.

As a 1x only guy I'm not too excited about the 405mm chainstay length but then again what's 5mms?
Looks like even if you max out tires there will be quite the gap to the seat tube on the Mira frame due to the seat stay-seat tube join construction which simply seems too far back.

That's far from ideal in terms of looks and aero. Not a big fan of V-shaped bars. On flat terrain I almost exclusively ride UCI-illegaly with my forearms/ellbows rested on the bars.
Not really possible here.

Interesting that even the "EVE" 1x13 speed mechanical groupset listed on their website is nowhere to be found and not advertised in any way.
The somewhat downgraded "G13" groupset (without any specification of chain width/sprocket spacing/cable pull ratio or crank axle width and diameter) has been bought by 19 people on AliExpress.

Tideacebike

With UDH, T47, replaceable+removable(for 1x) FD hanger, custom paint option there's a lot to like.

Looks like there's paint on the BB interface. Isn't that critical BB alignment wise with T47 but the paint might chip off after some cup/bearing swaps so that's a suggestion for the future.

40,42 or 44T chainring paired with the 10-33 cassette. If it's really pancake flat you even might get away with the 10-28 cassette which offers a 16T cog which in turn doesn't offer that much benefit.

In no case you'll need a chainring as big as 50. With 28mm tires at a cadence of 100 rpm a 50-10 gear ratio means about 65kph. You'd be multiple ITT world champion and hold the hour record if you could make use of that gear on flat terrain.

Also, question of chain durability. The internet says that starting with 11s chains, chains should be changed after 0.5% wear, not 0.75%. A 14s chain is going to be narrow AF, so it will probably last even less?
All of that sounds rather off-putting.

Joe from China Cycling said in his Shanghai Bike Show video they'd be using a "normal" (like Shimano / SRAM non-trransmission MTB?) 12 speed chain which they achieved by using a special thinner "classic" UDH derailleur hanger (you'll need a UDH frame).

So while this will provide extra cog space compared to SRAM 13 speed how do they ensure the derailleur hanger isn't extra easy to bend (given there is no additional "outer derailleur hanger plate thing" like on the 13 sp SRAM XPLR RDs)?

By the way, found a photo of the cassette on display at Eurobike. Looks quite a bit different from the one shown earlier this thread.

Cogs appear to be 10-11-12-13-15-17-19-21-23-25-28-33-39-45


Given the low stated part weights this groupset maybe isn't set to become the next bargain.

Took a closer look at the cassette and this curbed my excitement a bit. Due to bad gear distribution it doesn't offer any meaningful advantage over the SRAM XPLR 13 speed cassette despite the extra gear.

From the screenshot cog sizes appear to be 10-11-12-13-15-17-19-21-24-28-32-36-40-46. Compared to the XPLR cassette that's only unhelpful finer increments in the lower gears.

So there's uselessly tight jumps in the lower gears - 32-36 (13%), 36-40 (11%) and annoyingly big jumps in the lower/mid part of the cassette - 13-15 (15%), 24-28 (17%).

For me this cassette doesn't seem very useful for road 1x.


The following would be better gear distributions (if possible spoke clearance-wise):

10-11-12-13-14-15-17-19-21-24-28-33-39-46   (SRAM 12 speed 10-33 cassette + 39-46)

10-11-12-13-14-16-18-20-22-25-28-33-39-46

11-12-13-14-15-16-18-20-22-25-28-33-39-46   (there are UDH frames which only have clearance for up to a 46T 1x chainring, in this case some people would want a 10T cog)

10-11-12-13-14-15-17-19-21-24-27-31-36-42   (for road 1x I wouldn't need more than about 400% range)