Quote Originally Posted by Bluetree View Post
I was afraid of that too, not sure if a new collar would work, either.

'Nother question... how can I tell if it would work? .1mm is less than the width of a human hair. Can something "appear" to be on tight enough then slip once you're 50 miles from home? Can a torque wrench give you the most accurate reading?
The collar goes on the outside of the frame, and while some collars may extend up higher on the post than others, tightening the clamp down on the post will also tighten it on the tube. There is a very good risk of cracking your CF seat tube.

As for the other questions, yes. Even a correct sized post may slip over time for one reason or another. A torque wrench is the best, but there are degrees of accuracy among different wrenches. The best one I've seen is one (I think Park Tools makes it) where you pre-set the torque, and then when you start tightening the bolt, the wrench itself will not let you tighten past the set torque. Some people say just to go to Sears and get a Craftsman torque wrench.

Then there's a mini torque key for things like CF bars and stems where minute readings and low torque are more crucial.