High-precision ball upper arm short type

THE high precision ball bearing upper arm Shibata R31S340 is a version short of the famous BB Upper Arm model, specially designed for configurations with narrow geometry (narrow setting).

Its total length reduced by approximately 6mm compared to the standard version now allows optimal compatibility with vehicles with A-arm rear suspension, while maintaining the precision and fluidity characteristic of ball joints.

This arm can also be used for front axle, offering a more direct response and more balanced behavior.

• Kind : short ball bearing upper arm (BB type)

• Reduced length of 6mm for narrow settings

• Compatible with vehicles with A-arm rear suspension

• Can also be used at the front for precise camber control

• High precision manufacturing for minimal friction and extended life

• Upper arm axle PM 23.5 mm (R31S117) — recommended for narrow configurations

• Axis PM D-cut (R31S001 / R31S012 / R31S063) and M3x4 mm screws for threaded ball joints

This upper arm Shibata R31S340 improves geometry precision and drift stability.

Ideal for setups Competitive RWD, it ensures smooth and consistent control even at extreme angles.

• 1 pair of adjustable arms