Topeak Tri-Backup Tube Bag (Seat Mount)

Tri-BackUp TireBag provides protection from harmful ultra violet rays that can quickly degrade a tubular tire. So the next time you have to replace your tubular tire, it?s ready to go. Provides a compact easy to use solution to carrying extra tubes and keeps them out of the suns harmful rays which can degrade and cause premature failure Designed to integrate with Tri-BackUp Pro V and Tri-BackUp Pro I for maximum aerodynamic efficiency