Insight : Warm up and cool down seat post

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 crusing 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. Sizes/Lengths :22.2 x 360mm – uses 25.4 seat clamp27.2 x 420mm – uses 31.8 seat clamp Color : Black only Requires an additional seat post clamp for use