XT Chainring bolt torques?
I was torquing my chain rings last night to 70in/lbs -- all of the bolts are good except one - when I get to 60 in/lbs is starts to rotate -- is this an issue? There is an insert on the other side of the chain ring that accepts the bolt. I was checking this because I have some drivetrain noise during my last ride that only occurs when I was putting power to the pedals.
Zinn's book says to torque aluminum chainring bolts to 44 in-lbs and steel chainring bolts to 60-100 in-lbs. So... it's possible that you've overtorqued all of the bolts. (The chainring bolts on my Shimano XT crankset aren't attracted to a magnet - I assume this means that they're aluminum.)
Originally Posted by eman2
The Park CNW-1 can be used to hold that part securely.
There is an insert on the other side of the chain ring that accepts the bolt.
Also check the bottom bracket and pedals.
I was checking this because I have some drivetrain noise during my last ride that only occurs when I was putting power to the pedals.
The Park Tool site says to tighten Al Chainring bolts 44-88 inch pounds.
I have mine, FSA T-30s at 75 inch pounds.
The FSA website shows a torque value of 104 inch pounds for their Al chainring bolts.
Last edited by dulyebr; 02-08-2006 at 05:29 PM.