There is no secret Bombshell was first company bringing carbon rims into BMX. When others laughed, we stayed and kept exploring. Now, when others are starting, we are expanding. Our engineers designed this new carbon rim together with Pro BMX riders not only to be talked about. They were after the lightest, stiffest ride possible. Lower profile design specifically made for outdoor use is completing our PRO CS rims line. Track & Lab tests by the best. Available in 28 and 36 h version only as set ( F & R ) weight starts @ 8 oz ( +/- 10%) Lifetime warranty for manufacture defects.