Box Two Alloy Seat Post Size:26.8mm Featuring single eyelets to help

Featuring single eyelets to help prevent spoke pull-through

They have hollow

Note: Not a tubeless tire

and tandem flat-bar bicycles

Box Two Center Clamp 1 Inch Stems are cold forged from the highest quality 6061-T6 aluminum

Box Two Alloy Seat Post Size:26.8mm Featuring single eyelets to helpPerfect for BMX Racing Warm ups or Cool Downs, this lightweight seat post is made from 2014 aluminum alloy, and a cold forged aluminum alloy head gives the Box Two Seatpost a superb strength to weight ratio. The two bolt head design ensures solid seat positioning and plenty of adjustment. Each post has 20 millimeters of setback and 26 degrees of seat angle adjustment.