TRAXXAS TRX4 Front Knuckle Arms 14pcs Aluminium Upgrade TRX4021B by GPM  [TRX4021B]

High-precision knuckle arms for controlled crawling

This 14pcs aluminium front knuckle arm set is intended for TRAXXAS TRX4 Trail Crawler scale rigs and is designed to support steering linkages and the internal front knuckle gears, helping to keep gear runs steady during technical crawling.

Each arm is CNC-machined from aluminium 6061 T6 and finished to hold accurate geometry under load while providing a metal construction feel. The aftermarket kit reduces play at knuckle pivots and assists in preserving smooth gear engagement at low speeds.

Included fasteners noted by the product source are stainless steel screws in various sizes for mounting; confirm the counts in the box before assembly and apply appropriate thread engagement and locking methods.

Choose these knuckle arms to stiffen front-end geometry and cut down on slop; they are a tuning upgrade aimed at stabilising gear engagement for more predictable slow-speed crawling.