GB520UWR & VG520FWR
The UWR and FWR roadracing chains are designed to absorb the extreme engine torque impact and transfer it into superior high speed performance. These racing chains are lighter than 520GXW despite the same tensile strength.
When compared to 520GXW, the 520FWR chain is 10% lighter! The UWR and FWR chains are designed for roadracing use ONLY. Not recommended for street use.