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Old 02-10-15, 10:36 PM
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FBinNY 
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Join Date: Apr 2009
Location: New Rochelle, NY
Posts: 38,725

Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter

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I'm too old school to talk torque wrenches. My rule is simple -- you have to tighten the clamp bolt tight enough to do the job, hold the post from slipping or twisting in use, and no tighter. So I approach it by degrees, testing by trying to twist the saddle. Carbon assembly paste provides traction, so the post holds with lower clamping force, which is always a good thing.

The paste comes in two basic types. Some have hard grit and provide super hold, as the grit bites into the post and frame. The drawback is that this scratches the post as you slide it in and align the saddle. The other type uses rubber like particles to grip without biting, and is preferable for this application, unless the grater grip strength is absolutely necessary.

BTW- for those who like to work by numbers, the question remains, what if you tighten to spec and the seat post still slips?
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