All 9-10-11spd; Campagnolo 12spd; KMC & Wippermann 12spd; SRAM Eagle 12spd; SRAM Flattop 12spd; . Why didn't Shimano make 11-speed road cassettes compatible on 10-speed hubs? SRAM AXS 1x with an Eagle 10-50 cassette is still the king of being able to go as low as possible with 1x. Ultegra and Dura Ace Di2 groupsets are all 2×11. grx has 49.7mm and xt has 50,4mm. Ver. 1. . Shimano released their 12-speed DURA-ACE and Ultegra Di2 groupsets to the world on September 1st, 2021. DEORE XT. According to Shimano, this means I need to use the FD-RX810 front derailleur. The smaller large cogs of road-oriented cassettes, even with a 28 or 32 tooth large cog, would interfere with the spokes if fit on old freehubs, and if it the large cog clears the spokes, the extra width of the chain would likely cause problems. The Shimano GRX groupset is Shimano's premier mechanical gravel group for 11-speed shifting. GRX. Sure, the cassette is also present in Shimano GRX page, so I don't worry much about that. shimano grx cassette compatibility - sportssystems.com GRX 2x11 30/46T - 11/42T compatibility. - Singletrack World Magazine 07/28/20. Shimano GRX 810 11-Speed Rear Derailleur | REI Co-op This also turned out to be the first time trying out the new 11-40T cassette I installed on my 700c gravel wheelset. But in a 1x config, even Shimano states that mtn cassettes are the recommended option (with apparent support for an 11-46 11spd cassette, which is nice). After a few long gravel/ MTB and road rides, it is shifting great! I would expect no problems from there. I also chose to upgrade my rear cassette from a 11-34T to a 11-40T, and the GRX-RX400 did not require any type of extension link. Not compatible with 11-46T cassette. M640 Series. So, I'm currently running 2x11 105 on my CX/gravel bike, and there are a lot of owners out there running a . Much better than the 11 sp Ultegra RD-6800 with Wolf Tooth Road Link.