GRK RWD High precision ball bearing upper arm (various colors) (R31S329) Color:Purple Re-R HYBRID (except EVOL)

Re-R HYBRID (except EVOL)

Newbies may need help

if you change the hub to the [R31W339] GRK brake rotor

but it can also be attached to the GRKGS2EVO standard resin H arm

GRK RWD High precision ball bearing upper arm (various colors) (R31S329) Color:Purple Re-R HYBRID (except EVOL)(R31S329)GRK RWD High precision ball bearing upper arm (various colors) Product description A new upper arm developed for GRK5 is now available as an optional part! Adopts a bearing support type that achieves both high support rigidity and ability to follow the road surface. By minimizing installation play, geometry changes due to input and vibration are suppressed. You can expect improved tracing performance at the front and traction performance at