ljsense

I've got a saddle with oval carbon rails clamped into a Thomson seatpost. It clicks when my weight shifts on it.

The rails are in good shape, no cracks or damage. There's just enough micro movement to make a noise.

I had the two seatpost bolts torqued to 5 Nm. I increased that to 6 Nm, and that helped. I could keep tightening, but there is no torque rating on the rails, and before I did, I wondered if anyone has other approaches, like putting a paste or goop on the rails, or can provide a good max torque.

Thanks for any advice.

canopus 

A thin film of grease or oil usually takes care of creaks and such... Now, I am sure someone will come along a say that that stuff on carbon will eat away at whatever and cause your seat to disintegrate and cause you to crash and die, so...

The thing to determine is, is it the rails/clamps? or is it the seat? or is it the seatpost in the frame? You have to isolate each thing too determine the cause of the clicking.

frankenmike 

A light film of carbon assembly paste between the rails and the post would be a good thing to try.

ljsense

Thanks for the responses. I was contemplating grease or carbon assembly paste, but I wondered if anyone had tried something else. A thin layer of tubular glue or barge cement came to mind, as did Loctite. I just thought in this interface, it might make sense to have something that acts more as a rubbery binder.

fietsbob

I have no real issues with my steel rail bike saddles, but then again at my age my hearing is less than acute..




have access to a vacuum pump ? Vacuum Bagging gets air bubbles in carbon fiber lamination out ,
while the resin has yet to cure..

So would pull your rubbery compound into air voids between saddle & frame , One presumes..





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