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Nicely done OP 👍
It is indeed very satisfying when it all works out well 🙂
Might not make any difference but I fitted the ti nitride coated version of the bolt. Here's hoping!
good, now chuck the POS in a bin and fit some Shimano.
good, now chuck the POS in a bin and fit some Shimano.
You mean XTR ones? Plenty more expensive and also heavier?
Just stick to using the correct tools and this is unlikely to happen again.
Now you need to crack that bolt every 6 weeks to stop it happening again!
I’ve seen quite a few and have had two sram crank bolts of my own shear off. Cranks been on and off multiple times. It’s an aluminium bolt and at 55nm, it’s asking a lot from it.
SRAM gxp bbs are awful, press fit ones marginally better strangely! Quite why a stepped axle was necessary is bizarre and dub, well that can get in the bin. Shimano cranks on both bikes now, no cinching bolts down with the big torque wrench.
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Free Membergood, now chuck the POS in a bin and fit some Shimano.
You mean XTR ones? Plenty more expensive and also heavier?
Just stick to using the correct tools and this is unlikely to happen again.
So totally bypassing my post, previous page stating I’ve had everything from gx to xx1 both gxp and dub and they have all done the same, regardless of what you put on them or how long they’ve been on! It’s clearly a terrible design
They seem to a good job of torquing themselves up to, and beyond, 55nm themselves.
When I installed mine I did them up tight but without a torque wrench / breaker bar / combining my weight and gravity etc.
They certainly felt a lot tighter coming off then they did going on!
I've got a power meter "spider" on mine so I'd prefer to retain the SRAM cranks and manage this quirk by regular slackening off and re-tightening.
So totally bypassing my post, previous page stating I’ve had everything from gx to xx1 both gxp and dub and they have all done the same, regardless of what you put on them or how long they’ve been on! It’s clearly a terrible design
OK, but to counter your anecdote with anecdote, I have GXP cranks on two of my bikes (XX1 and X01) and both are fine. The set that I've had longest have been taken off the bike perhaps 5 times in 5 years (to change chainrings or BB) and I've not run into problems with getting them on or off.
Whenever people suggest preventative maintenance on high torque deformable interfaces (in this case with Alu bolts)it makes me squirm. I'm not sure the interface on any press-fit cranks (Shimano included) is made to be reassembled 10 times a year. It seems like a hassle that might shorten the lifespan of cranks, not extend it. IANAME 🙂
Aaand this is why i never use sram products.
Aaand this is why i never use sram products.
The cassettes, mechs and shifters are really good in my opinion.
The cranksets are best consigned to landfill.
Sorry @linusr, I did think about it but I had my hands full doing this job. Besides that the screeching from the drill and my boring commentary wouldn't have made exciting watching. It took me half an hour in a loop of drilling and measuring to get the head off. I do wonder if I'd just poked the end of a hot solder iron into the bolt for a minute or two that it might have softened the lock tight on the bolt and made removing easy.
Thanks for your help though!
Once the heads off the loads of the threads which is why its loose.