This aluminium knuckle arm is an aftermarket option from 3Racing for the TAMIYA TRF 416, listed as model 416-18/LB. It serves as a metal replacement that retains the original knuckle's mounting pattern and suspension geometry for a reliable swap.
Practically, the knuckle gives a solid attachment point for the wheel hub and steering linkage and helps keep suspension geometry stable during tuning sessions. Fitted to a TRF 416, it supports consistent steering input while you adjust camber, toe or shock settings without moving the knuckle mounting locations.
Installation notes: installs in place of the stock knuckle using the chassis' existing mount holes. Follow manufacturer torque specs and assembly order, and recheck linkage positions and wheel hex fit after installation to ensure correct alignment.
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