<ul><li>To fit frame seatpost hole:28.6mm.</li><li>Extra long:15.7"(400mm);Help to raise height of saddle,so that tall rider don't have to bent much forward.</li><li>Material:Strong aluminum alloy,tube thickness:2.05~3.05mm,durable and light weight.</li><li>Micro adjustable clamp:you can adjust the tilt angle of the saddle via the clamp to make the saddle horizontal.</li><li>Replacement seatpost for most bike,such as:mountain bike,road bike,and other universal bikes.</li></ul><br><br>

UPANBIKE Bike Seatpost Aluminum Alloy Adjustable Seat Post 400mm Length Diameter 25.4/27.2/28.6//30.9/31.6mm for Mountain Bike Road Bicycle(28.6mm*Black)