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Amazon.com : COCH Zoom Bike Seat Posts Bike Suspension Seatpost 27.2mm 31.6mm Alumium Adjustable Seatpost for MTB Road Bike Mountain Bike Fixed Bike Seatpost (Silver, 27.2mm) : Sports & Outdoors
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Jim Langley's Bicycle Beat: Q&A: Saddle positioning when your seatpost won't cooperate, and a wheel from my past surfaces
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