THE SEAT POST EXTENDER IS MADE FOR RACERS WHEN YOU NEED TO WARM UP OR COOL DOWN AFTER A RACE, OR FOR WHEN YOU WANT A MORE COMFORTABLE SITTING POSITION WHEN CRUISING AROUND, DUE TO THE ULTRA LOW FRAME DESIGNS AND SUPER SHORT RACE SEAT POSTS.

You just insert your current seat post and seat into the extender and ride away.
* The Insight Seat Post extender requires a 2nd seat clamp to clamp down the post into the extender.

INSIGHT seat post extender:

22.2 x 360mm black - Uses 25.4 seat clamp

27.2 x 420mm black - Uses 31.8 seat clamp