RX-series Rear Axle Upgrade XRAY 345101 Lightweight Assembly  [XR-345101]

Compact rear axle upgrade

The XRAY 345101 rear solid axle lightweight assembly is supplied as a single-piece axle shaft with a 48T composite pulley and the matching hardware needed to refresh older RX-series models. Precision machining of the axle reduces rotational mass by about 25% compared with the standard shaft while keeping a sturdy construction suitable for scale RC drivetrains.

Factory notes describe the axle being hand-ground to ensure concentric rotation, then heat treated and black coated to improve wear resistance. The 48T composite pulley installs onto the axle and is delivered with the appropriate fasteners.

Use this assembly when you need to replace worn rear drivetrain parts or when you want a subtle rear weight reduction to influence balance and transient response. Basic disassembly of the rear end is required for fitment; check the RX-series rear assembly interfaces before final installation.

XRAY 345101 serves as a direct replacement for earlier RX-series cars, offering lower rotating mass and accurate axle geometry to support rear drivetrain servicing and simple tuning refinements.