XRAY 345101 Lightweight Rear Solid Axle Replacement for RX Cars  [XR-345101]

Rear axle: lightweight replacement

The XRAY 345101 rear solid axle lightweight set offers a single-piece axle shaft assembly, a 48T composite axle pulley, and the required mounting hardware for replacing or upgrading older RX-series cars. The axle body is machined to lower mass by around 25% versus the standard rear solid axle shaft while retaining a solid construction meant for RC drivetrain use.

Manufacturer notes indicate the axle is hand-ground to ensure concentric rotation and then heat treated and black coated to improve surface durability. The 48T composite pulley mounts to the axle and is included with matching fasteners.

This axle set is suitable when renewing worn rear drivetrain components on earlier RX-series kits or when pursuing a small rear mass reduction to influence balance and transient response. Installation involves a basic rear-end teardown and reassembly; confirm compatibility with your RX-series rear interface before final fitting.

The XRAY 345101 lightweight rear solid axle is presented as a direct replacement for older RX-series models, cutting rotating mass while preserving precise axle geometry to aid rear drivetrain servicing and simple tuning adjustments.