TRAXXAS TRX4 Trail Crawler Aluminum Pendulum Wheel Knuckle Axle Weight by GPM TRX4023B  [TRX4023B]

Aluminum pendulum wheel weights for TRX4

This GPM aftermarket kit provides pendulum-style wheel knuckle weights designed for TRAXXAS TRX4 Trail Crawler platforms. The assembly adds concentrated mass at the outer knuckle to encourage downward force on the wheel during slow-speed crawling, helping wheels seat into low spots and maintain traction on uneven or muddy sections of trail.

The unit combines an aluminum body with a brass lid and stainless steel rolling beads as described in the source notes, and includes a 9mm hex adapter that is wider than the original for secure mounting. The pendulum mechanism allows the weight to self-adjust vertically so that the added mass tracks downward toward the ground rather than rigidly shifting chassis balance.

Installation location is the outer case of the front and rear wheel knuckles where these pendulum weights bolt on in place of or alongside stock hardware. The kit includes multiple fasteners and shims to fit the assembly and a 16 pcs set provides parts for all four wheels plus spares as listed in the included items. In tuning terms this part is used to increase per-wheel downward load, reduce wheel lift during extreme articulation, and to fine tune front/rear balance for slower crawl speeds.

Use this kit when you need increased wheel bite and a more stable slow-speed crawl feel on a TRX4 chassis, especially in muddy or low-lying trail conditions where extra downward force helps the wheel find and hold ground contact.