Carbon CS rim. It s no secret Bombshell made first bmx specific carbon rim. Hours of testing, designing and developing keep our carbon rims on top of the game. We are confident providing a one year warranty under manufacturing defect and up to  five year crash replacement to original owner on all of our CS carbon rims. Tested by World champions and other top professional riders who like stiff and responsive wheelset. There is no aluminum rim getting any close to weight of carbon rims without compromising strength, stiffness and responsiveness. Last, but not least - well build wheels with carbon rims will exceed in average 2-3 times lifetime of similar aluminum product with minimal maintenance. Made out of Japanese Torray carbon fiber in our USA designed tooling.