30.9 to 34.9 Seatpost Shim
$9.99
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Switching frames doesn’t mean you have to switch posts! Use your old posts without worry with the Problem Solvers Seatpost Shims. This seatpost shim allows you to use a 30.9 seatpost in a 34.9mm seat tube. It has 97mm of insertion with a 3mm lip for an overall length of 100mm.
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