Carbon seatpost in an aluminum frame

blorg
blorg Posts: 1,169
edited September 2007 in Workshop
Hi, I'm thinking of replacing my seatpost and might go for a carbon one. It's going into an aluminum frame - anything I should know? I am presuming no grease, anything else?

Comments

  • nicklouse
    nicklouse Posts: 50,673
    depends on who you talk to.

    http://www.bikeradar.com/forums/viewtop ... t=12534958
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • JustRidecp
    JustRidecp Posts: 302
    lol. Be ready for a lot of different opinions mate! I run the same set up and followed the manufacturers instructions - no grease, bolts at correct torque. Not had any slipping yet.

    As its aluminium frame and has big tubes, I need to run a shim in my seat tube. This is greased against the frame. If the post seizes it'll be against the shim and hopefully should still slip out!!
    Real Ultimate Power

    "If I weren't a professional cyclist, I'd be a porn star" - Super Mario
  • blorg
    blorg Posts: 1,169
    From your experience, does it have any comfort value at all? With the bike I am putting it on weight is really not a consideration.

    I was thinking of something along the lines of this Specialized Pave Seatpost:

    http://www.wiggle.co.uk/ProductDetail.a ... eat%20Post

    It's to replace a USE suspension post that is making a bit of noise and is maybe a bit bouncy for my taste.

    My other bike is carbon frame and seatpost and gets on fine without the grease. Just wondering if there is anything I need to watch out for with the aluminum-carbon interface.
  • woody-som
    woody-som Posts: 1,001
    I've used a carbon post in my alu Giant bike for ages, never had any problems, as for comfort, then that depends on how much of the post is showing - more post = more comfort.
  • paulbricey
    paulbricey Posts: 84
    I've changed a generic carbon seat post for a Spec Pave seat post in my aluminium frame and noticed a HUGE improvement. Pave just much more comfortable. Had to hack the old one just to get it out and I didn't grease the new one.....no probs slipping or sticking.
    Briceyinstockport
  • JustRidecp
    JustRidecp Posts: 302
    Yes. The improvement is drastic. I use a spech pave as well. I didn't expect the difference to be so great.
    Real Ultimate Power

    "If I weren't a professional cyclist, I'd be a porn star" - Super Mario
  • Border Cyclist
    Border Cyclist Posts: 1,279
    JustRidecp wrote:
    Yes. The improvement is drastic. I use a spech pave as well. I didn't expect the difference to be so great.
    I fully agree.
  • wildmoustache
    wildmoustache Posts: 4,010
    nothing you should now ... don't tighten the post too much (strictly speaking, stick to the rec. torque using a torque wrench... but not many of us do that). i have used a carbon post in an alu frame for 5 years with no problems.
  • blorg
    blorg Posts: 1,169
    Ok, have ordered a Specialized Pave so. Presume I should degrease the interior of the seat tube- any tips on how to do this?

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