Best Seller | ZOOM Suspension Bike Seatpost Absorber Seat Pole MTB Bike Seat Tube 31.6x350mm / 27.2x350mm Bike Seat Post Suspension bike seat post fit mountain bike well. Feature: Length: 350mm diameter: 31.6mm fit for mountain bike. Length: 350mm diameter: 27.2mm fit for road bike. Aluminum alloy constructed. Standard clamp easy installation. Specification: Material:... more | | $28.21 FREE shipping go to store |