There were 3 main points that went into The Union rim. We wanted a carbon rim that was lighter and had lower radial stiffness than anything we'd made before, and gained a dramatic increase in impact resistance. With our new philosophy on carbon layup design and these key points, we were able to achieve something truly impressive. This rim is made for those who want to race Enduro at a high level and ride harder than ever before. If you have ever had doubts about carbon rims, look no further than The Union.