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

Improve X4 Traction with the XRAY 302133-S Soft CFF Arm

The XRAY 302133-S X4 CFF Carbon-fiber Fusion Upper Arm is a focused upgrade for racers running low-traction tracks. Built from graphite and a softer composite mix, this lightweight suspension arm increases mechanical grip and lateral traction for tighter steering on asphalt and carpet surfaces.

Construction and Carbon-Composite Balance

This upper arm uses a layered approach that blends an inner carbon fiber plate with surrounding composite material, producing the desired balance of stiffness and compliance. The thickness of the inner carbon layer controls the arm's stiffness, while the composite skin manages flex and rebound to keep handling predictable through corners.

Recommended Use and Fitment Notes

Best suited to low-traction conditions, the soft fusion arm is recommended where extra grip is needed. It installs on the front right and rear left positions of the X4 series chassis for improved traction balance. Note that the softer construction can be a bit more delicate than harder variants.