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?
Can't Keep It Up
Sat, 10/15/2005 - 5:04pm
Sat, 10/15/2005 - 5:41pm
#1
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
Sat, 10/15/2005 - 5:57pm
#2
Thanks
Robert;
Good to have you along. The seat tube was never lubricated. I am wondering if this problem may be endemic with CF seatposts...
Sat, 10/15/2005 - 7:13pm
#3
slippage
"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.
http://www.excelsports.com/new.asp?page=8&major=6&minor=8&description=Seat+Post+Clamp&vendorCode=CAMP"
Sat, 10/15/2005 - 6:57pm
#4
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.
Sun, 10/16/2005 - 5:31am
#5
Try using a seatpost shim (nm)
Sun, 10/16/2005 - 3:42pm
#6
Good Idea (nm)
