Zoom Suspension Seatpost made from sturdy 6061‑T6 aluminum alloy, this seat post includes a coil spring + elastomer damper that absorbs road vibrations and trail shocks—perfect for biking across city streets, rough gravel tours, or mountain trails Zoom Bike Suspension Seatpost: 27.2 / 30.9 / 31.6 x 350 mm Shock...