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Tige de Selle suspension Redshift Shockstop 27.2mm - 350mm
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REDSHIFT ShockStop Suspension Seatpost for Bicycles, Shock-Absorber Bike Seat Post for Road, Gravel, Hybrid, and E-Bikes : Amazon.co.uk: Sports & Outdoors
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Review: Redshift ShockStop may just change your mind about suspension seatposts - Bikerumor