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Out for a snow play this morning and struggling to clip in. Looked down and my non drive side crank has about 5-10mm of wobble.
It’s an xtr 11spd setup. I’m going to pull it apart shortly and I guess the splines are wazzed.
I’m thinking about a strip and clean and rebuild with a healthy drop of loctite.
What does the assembled think? I’m considering it’s either scrap or not. So getting another season out of it until the bottom bracket croaks.
I guess the splines are wazzed
🙁
you may get lucky but I've found they always slip again after that
If the bolts are tight (and not sheared!) and the axle itself isn't moving, then the crank or the axle will be toast.
The axle is steel as far as I know, so likely the LH crank spline is gone. If the spline is stripped no amount of loctite will hold it in place.
Its a weird one!
Check how much crank is actually on the spline. I knackered an slx crank in the same way by rushing to put a bike together and putting too many BB spacers in which meant there was only a small amount of spline in the crank. Crank ripped off.
Removing the spacers gave it enough spline to work without slipping
I’ve been having the same problem with some XTR cranks that hadn’t ever been removed from new and have no spacers.
The only thing I’ve noticed is that there is maybe 2mm more of the splines showing than on my other bikes, which suggests the frame is just a little wider than it should be??? Or does that amount not matter?
I’ve changed the bb, cleaned and reassembled everything, and if that doesn’t work I will try a spare crank on it. And after that I will cry.
I don’t suppose I’m going to get this sorted under manufacturer’s warranty am I??
Hmmm. Well the splines aren’t great, and the bolts were tight. Found a metal preload cap cleaned it all out and it’s gone together snugly sans loctite. I’ll give it a go tomorrow and see what happens.
Well that didn’t work. Held together for 12miles but it’s as wonky as wonky is.
Yep. Like the old days of square taper where the LH crank would always stretch its taper, and no number of coke can shims would help. Once the taper is worn, the crank is toast.
Yep had this with an old Desire crank. No amount of tightening, bearing fit , loctite made any difference. Had to buy a new crankset.
Somebody did suggest hammering thin pins between the splines but I never tried it!
Sounded like an old bodger's tale.
I had this over the weekend with a mates Raceface crank. He now needs a new one as it's properly knackered. Never seen it before and I've ridden a similar crank for the last 4 years, and I've done an awful lot more miles than he has with his.