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  1. #1
    Senior Member
    Join Date
    May 2007
    My Bikes
    '09 Giant Boulder SE
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    seat post shim engagement

    I bought a pogo stick seat post (has the shock absorber right under the seat mount) for my bike, but had to buy a shim cause the diameter of the new post is smaller than the old. I also bought a seat post mounted rack. The problem is, I canít tighten the rack enough unless I mount it on the shim. Now with the rack mounted, it leaves just a few inches of shim left for engagement. My question is, will this be ok or should I buy another shim so the full depth of the shim is inside the bike tube/clamp?

    If it matters, '09 Giant Boulder SE.

  2. #2
    Senior Member CACycling's Avatar
    Join Date
    Feb 2008
    Location
    Oxnard, CA
    My Bikes
    '08 Fuji Roubaix RC; '07 Schwinn Le Tour GS; '92 Diamond Back Ascent EX
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    No, you need the whole shim inside the seat tube. Get a second shim for the rack if needed.

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