Can't Keep It Up

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6 replies [Last post]
Anonymous's picture

I have a Deda Black Stick Mag seatpost and no matter what I do, I can't keep it up in my preferred position. I have a torque wrench ang torque the clamp bolt to correct specifications but every couple weeks or so it seems I lose a couple millimeters.

Anyone with similar experice or advice?

Anonymous's picture
robert (not verified)
lube job

is your seat tube lubricated? my bike for example has a (fiberglass?) sleeve in the seat tube and is never supposed to be lubricated. some mechanics when doing a tune up just do it reflexively, the result being the seat post slips. you have to go back in with a paper towel and get rid of the lube.

n.b. great ride today

Anonymous's picture
John Z (not verified)


Good to have you along. The seat tube was never lubricated. I am wondering if this problem may be endemic with CF seatposts...

Anonymous's picture
B. Dale (not verified)

"I solved my problem by lightly scuffing (the CF seatpost). I know a guy who had good luck with the new Campy seat post binder designed esp. for use with CF posts. Supposedly, it exerts a more even pressure to help combat slippage/reduce the temptation to over-torque. I contemplated buying one myself, but scuffing has proven effective."

Anonymous's picture
Neile (not verified)
A second clamp on top of the first could knock out the problem.

I had a rider with a carbon post who stripped the head of the bolt on his clamp -- so every other mile he had to stop to raise it again.

Even if the head wasn't stripped, I'd be very nervous to risk over-torque-ing a carbon seatpost.

Luckily he had rear reflector onto the seatpost with nylon/rubber clamp. Was able to lower and re-clamp the reflector to just over of the seatpost clamp.

Held fine for the rest of the ride.

Anonymous's picture
<a href="">Peter O'Reilly</a> (not verified)
Try using a seatpost shim (nm)
Anonymous's picture
John Z (not verified)
Good Idea (nm)
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