Hitting the ground sucks, but at least our bodies heal pretty quickly. Bikes, however, don't mend themselves. Option number one is to keep your bike upright, but accidents do happen. Behind door number two is crash protection, and B2's Pro Rail offers extensive safety. Each bar is manufactured from steel tubing to provide maximum structural strength, and the fittings are CNC milled for a precise fit. The pucks play the role of a frame slider, but are also designed to offer some "cushion" upon impact.