Advertise on Bikeforums.net



User Tag List

Results 1 to 2 of 2
  1. #1
    Senior Member Grambo's Avatar
    Join Date
    Jan 2007
    Location
    S.E. Chester County PA
    My Bikes
    IF Ti Crown Jewel, Moots Mooto X RSL 29er, Fat Chance Yo Eddy, Lynskey Pro Cross
    Posts
    480
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Seatpost Shim - Intsall Above or Below Setapost Collar?

    What is the proper way to install a seatpost shim? Should I remove my seatpost collar and have the lip of the shim sit directly on top of my seat tube and then re install the collar or just insert the shim on top of the collar? Also, I assume I should align the spilt in the shim with the split in the seat tube?

  2. #2
    Senior Member
    Join Date
    Apr 2009
    Location
    New Rochelle, NY
    My Bikes
    too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
    Posts
    20,476
    Mentioned
    44 Post(s)
    Tagged
    1 Thread(s)
    It depends on whether your collar has a lip covering the top of the seat tube. If so, you have no choice but to put the shim on first.

    Likewise if the shim has a lip which extends beyond the OD of the seat tube which would then need to be above the collar. (lips on shims that large are rare, but it's something to check)

    If the presence of a lip on the shim or the collar doesn't dictate which way it needs to be, feel free to please yourself.
    FB
    Chain-L site

    An ounce of diagnosis is worth a pound of cure.

    “Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin

    “One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

    WARNING, I'm from New York. Thin skinned people should maintain safe distance.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •