XRAY 302133-S X4 Soft Carbon-Fiber Fusion Upper Arm Performance  [XR-302133-S]

XRAY 302133-S Soft Carbon-Composite Upper Arm for X4 Handling

The XRAY 302133-S X4 CFF Carbon-fiber Fusion Upper Arm is intended to raise mechanical grip on low-traction circuits. Made from a graphite core with a softer composite overlay, this arm helps the car hold tighter lines on both carpet and smooth asphalt.

Design Principles and Flex Tuning

The arm's inner carbon fiber plate thickness defines its core stiffness while the composite perimeter controls flex and rebound. This design yields stable, repeatable handling so drivers can predict behaviour through consecutive corners.

Application Advice and Fitment Positions

Recommended for low-traction scenarios, fit this soft arm to the front right and rear left positions on X4 chassis to fine tune balance. Keep in mind the softer construction offers less resistance to heavy impacts than stiffer versions.