Constructed of ultra light and strong T6 aluminum alloy. Light weight, never rust(ISO 9001,14001).This 30.9 mm suspension seatpost is designed to absorb the shocks from the road suck as hitting a pothole ,it is not for making the ride like sitting on a limousine ,If you need more comfortable riding,please consider advanced remoted control or hydraulic seat post
Seat Post Size: (30.8)30.9mm ,Length :350mm , no adapter , real outer diameter
