XRAY 303848 rear anti-roll bar above-arm mount 1.8mm  [XR-303848]

Rear anti-roll bar for X4/X4F

This XRAY 303848 rear anti-roll bar is an RC-scale component engineered for the X4 and X4F rear suspension arms, using an above-arm mount (AAM) layout. The bar specified at 1.8mm targets rear roll stiffness and is intended for fine-tuning handling balance on touring-style RC chassis.

The system uses ball-bearing-mounted rotation points to reduce friction and allow smooth, repeatable movement during setup changes. Height adjustment is implemented via a screw-mounted link for quick, on-track tweaks, and laser-engraved stripes on the bar provide immediate visual identification of thickness.

In tuning terms, swapping to a thicker rear anti-roll bar increases rear roll stiffness, which can reduce body roll and shift handling balance toward understeer on RC models, while a thinner bar softens rear response. Use incremental changes and test runs to find the desired balance for track conditions.