Bontrager's Race Lite Rear Cage Holder lets you carry everything you need tucked strategically out of the wind. This smart carrying solution secures to your saddle rails. It comes with 2 rear-specific cages that hold bottles tight, even over rough terrain. Multiple holes let you strap on tubes, tires, gels, anything you'll need on long rides. There are specific places for 2 CO2 cartridges and an inflation head, too.