XB2 and XB4 Rear Universal Shaft Upgrade 77mm - XRAY 325220  [XR-325220]

Replacement rear universal shaft — XB2 & XB4

The XRAY 325220 universal drive shaft is an RC rear driveline component intended to directly replace the factory rear drive shafts on XB2 and XB4 platforms. Produced from Hudy spring steel in a 77mm format, the part aims to produce a freer drivetrain with less binding through suspension travel.

From a setup perspective, the universal joint geometry allows smoother articulation over bumps and irregular surfaces, helping the chassis retain traction on bumpy circuits and artificial turf. The shaft's finish and form reduce dust accumulation at the joint area, which can decrease cleaning frequency during events with loose grit.

Installation is simple for anyone used to XB2/XB4 maintenance: the part uses the same mounting interfaces as the stock rear shafts and fits into the rear axle assemblies of those models. When tuning, validate ride height and camber first and then check driveline feel; universal shafts can modify transient behaviour relative to rigid axles, so modest damping or anti-roll bar changes may be required to restore your target balance.

For XB2 and XB4 drivers seeking a plug-in rear shaft that eases drivetrain binding and reduces upkeep on dusty layouts, this Hudy spring steel universal shaft is a pragmatic upgrade to include in race preparation.