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Have an XX mech on my Levo. After some initial frustrations and watching set up videos, got it working sweet. Aligned the notches, tensioned in the set up cog, A/B switch thingy position correct
However, the bloody thing won't stay at the right angle of dangle.
Initially didn't have the right tools to torque, so guessed - I use a lot of tools and general have a pretty good feel. They are apparently very particular to correct torque though.
So, now, everything torqued as it should be, finish a ride and it's moved. Seems crazy that the rear axle holds it in place tbh, but that's how it is.
What am I doing wrong?
I had that issue when I first used my GX setup. Turned out that the little plate that sits against the frame had moved. If that’s not sitting properly tech will do as you describe.
I didn't tighten mine up enough. Wasn't at home didn't have a torque wrench. Then first ride back it was clobbered by a rock and slipped forward so slackening the chain. We couldn't get it tight enough with multi-tools. Just kept slipping. Now it's been probably reset and tightened as per spec and it's been rock solid.
I'm trying to visualise that plate @mashr is talking about- I guess mine has that I just can't remember it! Will have a look later and also check torque to see if it's still 36nm. Feels like a lot. Well until you're tightening the SRAM cranks!
That’s not an uncommon issue. I’ve seen it on quite a few bikes, usually you can tell it’s started to move because it gets more chain slappy before it really screws with the shifting.
I think it comes down to tolerance issues mainly. The 3 parts (frame, bushing & mech) all need to be spot on & I’ve definitely fitted it on one bike (Santa Cruz) where it felt a bit too easy to put together, guess what, it kept coming loose…
I saw a bodge job where someone an extra super thin plastic washer between the frame & the red bush to space it out, which I tried - it was a lot tighter to fit, but it was rock solid after & never moved again.
I assume the little plate is the silver metal one that the mech is meant to line against as part of the setup in this instance.
Have also seen a few stripped hanger bolts when people have torqued them up to spec, so be careful.