Shibata DR Short Ball Bearing Upper Arm (R31S340BK / R31S340RD / R31S340PU) (SKUs: R31S340BK, R31S340PU, R31S340RD).
Shibata Dr Short Ball bearing Upper Arm delivers 6mm of length reduction compared to standard designs, unlocking tighter rear A-arm configurations previously impossible to achieve. The compact profile maintains full ball bearing performance while opening new setup possibilities for drift-focused builds.
Versatile mounting allows front or rear installation. For narrow rear setups, pair with PM Upper Arm Shaft 23.5mm (R31S117). If converting from turnbuckle-type arms, source D-cut PM Upper Arm Shaft options (R31S001, R31S012, R31S063) and M3×4mm set screws separately to complete the swap.
Premium Shibata engineering in a purpose-built form factor for competitive drift geometry.
