The topeak tri backup tyre bag long days in the saddle training and racing take their toll on your equipment 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 itrsquos ready to go designed to integrate with tri backup pro v and tri backup pro i for maximum aerodynamic efficiency topeak tri backup tyre bag features provides protection from harmful ultra violet rays tha