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Help how would i manage to remove one of the m5 pinch bolts on the left side of my xt crank.Some how even using a torque wrench the little bugger managed to shear off and is it easy to get a new bolt.You think your doing the right thing buying the correct tools and still things manage to go wrong oh bugger.
sheared at the bolt head, aye? this happened a few years ago to a set of Saints I (still) have, I drilled right through the centre of the bolt then simply wound it out with an old screwdriver jammed into it. replaced with a standard metric bolt o higher quality IIRC
drill a groove in it so you can unscrew it with a flat screwdriver
or buy a screw extractor drill bit
http://www.screwfix.com/p/screw-extractor-set/18643
either way take care and probably quite hard to dril
it can go out the other end too (if the bolt is threaded all they way)
replace with decent M6 socket cap as above.