Carrier Ring Set - Rear - BlackCaracteristicas: Carrier Ring Sets are the key components of the Pro Series System Modular carriers allow riders to quickly and easily alternate their wheel tire race sets for different track surface Fronts include carrier ring adapter and all necessary spacers and hardware to mount OE type brake rotor; rears include carrier ring adapters (2) and all spacers and hardware to mount OE type brake rotor and drive sprocket Peso: 2. 2 Alto: 1. 99 Largo: 9.