Maybe someone had similar problem, I’ve installed exactly same cassette Shimano CS-HG700 11-34T 11 gear on my Tacx Neo 2T. Everything fits without any issue on the trainer. I’m using my Cube Nuroad Race bike with Shimano GRX RD-RX810 drive. It seems that everything works fine when I mount the bike wheel with all 11 gears but when I mount the bike to the trainer the smallest cog is inaccessible. The chain switches to second cog. It looks like the cap that holds the bike (12 mm thru axle adapter drive side) is 3mm shorter than the one I have on my wheel. Regulation doesn’t do much as the maximum limit for the drive is still not sufficient to switch to first cog. Did anyone experienced some similar issues? Many thanks for any ideas and help.