Amazon.com : Promax Seat Post - Black, 350 x 27.2 mm : Sports & Outdoors
Amazon.com : REDSHIFT ShockStop Suspension Seatpost for Bicycles, Shock-Absorber Bike Seat Post for Road, Gravel, Hybrid, and E-Bikes, 27.2mm x 280mm : Sports & Outdoors
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Amazon.com : Bicycle Suspension Seatpost for E-Bike, MTB Seat Post 27.2mm Diameter, Spring-Loaded Aluminium 350mm Length with 30.9 31.6mm Spacer : Sports & Outdoors
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Amazon.com: Spring Suspension Seat Post 25.4 27.2 30.9 30.8 Damping Bike Seat Post Seatpost 350mm (Size : 31.6 * 350mm) : Sports & Outdoors