TRX4 Pendulum Mass Upgrade 23mm Hex Adapter TRX4023D TRX4023 by GPM  [TRX4023D]

Engineered pendulum weight for TRX4 knuckle assemblies

This GPM pendulum wheel weight is designed for compatibility with the TRAXXAS TRX4 Trail Crawler and features a CNC-friendly aluminium outer body paired with removable stainless rolling beads to lower the rotating mass footprint at each wheel. The configuration deliberately positions mass low and outboard on the knuckle outer case to increase static and dynamic wheel load during slow-speed crawling while retaining pendulum articulation.

The kit supplies a widened 23mm hex adapter, a multi-piece bead stack for incremental mass adjustments, and all matching fasteners. Each bead is roughly 4g and assemblies accept up to eight beads, placing per-piece mass across the 44-64 gram band when fully populated. Hardware and bead tolerances are selected for repeatable fit and serviceability.

Installation mounts the pendulum weights to the front and rear outer cases of the knuckles, preserving natural pendulum movement so the added mass seeks the lowest point through suspension travel. Technicians can alter bead count to tune the low-speed traction versus response curve; maintain a minimum of three beads per assembly for predictable results.

A precision approach to adding controllable, downward-oriented mass at each wheel to improve slow-speed traction and stability on TRX4 platforms. by GPM