XRAY RX8 Lightweight Rear Solid Axle Pulley 48T by Arrowmax AM-RX8-345148  [AM-RX8-345148]

RX8 rear pulley replacement

The Arrowmax AM-RX8-345148 rear pulley is aimed at XRAY RX8 racers seeking a drop-in replacement that trims weight without altering drive geometry. Machined from 7075 T6 aluminium and given a hard coat, the part focuses on durability where the belt contacts the pulley.

Built with 48 teeth and close tolerances from CNC machining, the pulley also includes side holes to help eject debris that can sit between the belt and pulley flanges. The hard-coated face gives improved resistance to belt wear and supports steady mesh over time.

Installing the unit is routine for those familiar with RX8 maintenance: remove the factory pulley, inspect bearings and fixing hardware, fit the Arrowmax AM-RX8-345148, and then verify belt alignment and tension. This is intended as a like-for-like swap without chassis changes.

For RX8 users wanting a balanced upgrade, the Arrowmax AM-RX8-345148 offers reduced rotating mass plus a hard-coated finish and drainage holes to keep belt performance consistent under race conditions.