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
Redshift ShockStop PRO Suspension Seatpost 27.2 mm - 350 mm
Redshift Sports ShockStop Suspension Seatpost | REI Co-op