X4F/X4 Compatible Rear Anti-Roll Bar XRAY 303848 1.8mm  [XR-303848]

Tuning Notes for X4/X4F Rear Roll Bar

This XRAY 303848 rear anti-roll bar fits the X4 and X4F rear suspension arms in the above-arm mount format. At 1.8mm thickness it is intended to change rear roll stiffness for improved handling balance on touring chassis.

Ball-bearing-mounted rotation points keep friction low for precise response, and the screw-mounted link allows height adjustment without disassembly. Laser-engraved marks on the bar provide an easy reference to confirm thickness during setup changes.

In practice, a thicker rear bar like this raises rear roll resistance, which can reduce overall body roll and shift handling toward understeer. Make measured swaps and test in the conditions you race to find the best compromise.