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Carbon post slip...help!(7 posts)

Carbon post slip...help!CrazyMan
Jun 3, 2002 9:53 PM
Got a Selcof carbon post on a 2001 Giant TCR.
It slips like crazy!!!
Any advice?

Thanks
re: Carbon post slip...help!Guru_at_AmClassic
Jun 4, 2002 3:23 AM
If you are using grease on the post, it will always slip, on the TCR that is. You also need to turn the shim so that the split is in the front of the seattube. This will distribute the pressure all around the post.

Let me know if that works

Guru
American Classic
re: Carbon post slip...help!Paul
Jun 4, 2002 3:42 AM
Maybe try a different seat clamp, or try a shim. have to be careful with carbon seat posts with overtightening. I have a Look ergo, and it's no problem. If you have calipers, iwould measure inside dia./outside dia. just to see the difference if any.
i had the same prob on minespdplayr
Jun 4, 2002 8:51 AM
I have TCR 0 and had the same deal. I cranked the bi^ch down well beyond the point of reason adn when I couldn't get that binder bolt any tighter--it stayed--only then.
re: Carbon post slip...help!CAMARIDE
Jun 4, 2002 4:23 PM
OK Here's your answer..I have dealt with this with various combos of carbon frame/ seatpost combo..The latest was last week on my TREK 9.8 carbon frame with a CT-2 carbon seatpost....Ready? Wipe clean both seatpost and inside seatube with acetone or any other good solvet even alcohol(careful of the paint!) Then use blue locktite on both the seatclamp bolt and the seatpost or seatube...Put it all back together and once it sets up, NO more slip!!
Thanks...i'll try it! (nm)CrazyMan
Jun 5, 2002 9:04 PM
nm
re: Carbon post slip...help!clintb
Jun 14, 2002 11:36 AM
Official stuff from Giant:

1. No grease on post to shim junction.
2. Grease the shim to frame contact point.
3. Put "split" in shim at front of seat tube.
4. Torque the binder to 120 kgf/cm. Divide by 1.15 to get in-lbs.

The torque figure is a bit high for me and verified with Giant just to make sure. I keep mine torqued to 60 in-lbs and have zero slippage problems. I weigh 200lbs also.