Tamiya TB04 Rear Knuckle Arm Aluminium by GPM TB4022  [TB4022]

Aluminium rear knuckle arm for TB04

This aluminium rear knuckle arm is an RC-scale replacement part produced by GPM for the Tamiya TB04 platform, supplied as 1 pr. It is intended to replace the stock plastic knuckle on the TB-04 chassis without implying any non-RC vehicle use.

Material choice and role: the aluminium construction provides greater rigidity and wear resistance compared with typical plastic knuckles, which can help preserve alignment under repeated load and during setup changes. In practical tuning terms the part contributes to repeatable steering geometry and consistent rear-end behaviour during practice and race sessions.

Fit and installation notes: this item fits the TB-04 series as identified in the product name; verify existing suspension pins and bushings match before installation. Installation normally requires removal of the wheel hub and old knuckle, transfer of wheel bearings if needed, and reassembly using the original hardware. Use appropriate thread engagement and check wheel bearing preload after fitting.

Tuning considerations: swapping to aluminium rear knuckles can slightly alter steering feedback and rear traction response due to increased stiffness; pair this part with measured toe and camber adjustments rather than multiple simultaneous changes. Inspect hex screw tightness and avoid overtightening which can induce binding at the wheel bearing interface.