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Heads up on those new carbon seatpost clamps from the big brands
I used to just slap them on and torque to spec, but after seeing three posts crack at the binder bolt slot in my shop this spring, I changed my whole process. Now I use a torque wrench for the bolt and a second pass with a beam-type wrench on the collar itself, checking for even gap all around. The issue seems to be with the molded-in alloy inserts pulling out under uneven pressure. Has anyone else found a better way to set these up without a scary 'crack' sound?
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lucask117mo ago
Are we overthinking this? I just follow the printed torque spec with a decent wrench and it's been fine for years. Those three cracked posts you saw could have been from old damage, a bad batch, or even over-torquing by the previous owner. Adding a second wrench and checking the gap seems like a solution looking for a problem. Most people don't have a beam-type wrench just lying around. Sometimes the simplest method, done right, is all you need.
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adams.dylan6mo ago
Except those three posts were all from people who said they used a clicker wrench right on spec. Maybe the simplest method isn't always right for this part.
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ruby_reed487mo ago
Yeah I saw those cracked posts on the old forum. I just use a clicker wrench and go a little under spec, like 5 ft-lbs less. Never had one come loose or break.
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