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Carbon seatpost, aluminum shim/tube...where to grease??(7 posts)

Carbon seatpost, aluminum shim/tube...where to grease??DT
Jan 28, 2002 6:33 PM
I just ordered a USE Alien carbon post for my Klein, and the necessary shim. What parts need greasing? Thanks!!
re: Carbon seatpost, aluminum shim/tube...where to grease??edmundtan
Jan 28, 2002 7:34 PM
Manufacturers of carbon seatposts specify you do not grease the carbon tube itself. The aluminum shim (if used) to aluminum seat tube contact point should be greased lightly.
re: Carbon seatpost, aluminum shim/tube...where to grease??velobear
Jan 28, 2002 8:11 PM
I was also looking for a carbon seatpost for a Klein I'm building up. How did you decide on the USE over Easton and Syncros? Also, any advantages or disadvantages to using a shim, due to the fat seat tube on Kleins? BTW, is there much difference in shock absorption/comfort with a carbon post over what you had before? Thanks in advance!
My $.02 worth...DT
Jan 28, 2002 8:47 PM
When I get the post and actually try it out, I'll post here how it feels compared to my Icon aluminum post...I ride some pretty rough roads around here (Mississippi), and with a stiff Klein, and with 700x20 tires, so I'm hoping it helps. I just got a EC-90 handlebar recently, and that helped some. I decided on the USE purely based on I replace stuff on my bike, I want to go as light as $$$-ly possible...I'm only 150#, so I'm not too worried about busting things. I'll let you know how it works out!
Ditch the 20mm tiresCT1 Guy
Jan 29, 2002 12:53 PM
Never mind about changing the seatpost to make the bike more comfortable - get rid of the 20mm tires. They're no faster than than wider tires (most likely slower) and only more likely to puncture. I'd recommend 23mm tires - I'm less than 130lbs and notice the difference.
my exp. w/ different seatpoststcr01
Jan 29, 2002 6:21 AM
Here is my exeperience.

On my TCR, I have tried the Mike Burrows carbon post that came with the bike. It is a 27.2 and utilizes a shim. I have also tried a Thomson setback 31.6 using no shim at all and finally have tried a Thomson setback 27.2 with a shim. I decided to stick with the Thomson 27.2 with a shim for these reasons.

The Giant carbon post always was creeping down on me. I tried lightly sanding it, tightening it a little more and it always crept down which was anoying. I had to readjust every 2-3 weeks.

The Tomson 27.2 has the identical ride characteristics to the carbon post and doesn't creep and the clamp is far, far easier to fine tune saddle position. No worries about failure either. A side note, the 27.2 Thomson is actually lighter than the Mike Burrows when cut to the same length.

I tried using a Thomson that was a larger diameter and did not need a shim. I found it was noticably stiffer and was heavier as well. In general, I have always found a weight savings by using a 27.2 post with a shim rather than a 31.6 post. It also allows a bit more comfort for someone who is fairly light. A 31.6 post is stiff and unforgiving and can be harsh on a lot of riders.

Hope this helps.
You may be onto something here! -NMTig
Jan 29, 2002 7:28 AM