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compatibility - Are seatpost shims safe to use - for the frame, seatpost, and the rider? - Bicycles Stack Exchange
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Ks Exa525 Mtb Seatpost 27.2/31.6mm*350mm Suspension Damper Seat Post Road Bike Bicycle Seat Post Bicycle Accessories - Bicycle Seat Post - AliExpress
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Amazon.com : Ultimate Sports Engineering Seatpost CRB 27.2 400mm Micro USE Alien, Black : Sports & Outdoors
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U.S.E. Ultimate Duro Carbon Seatpost 31.6mm x 400mm, 10mm Setback, 222g, Matte - Simpson Advanced Chiropractic & Medical Center
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