The TT2B021 aluminium front knuckle arm is provided as an aftermarket replacement compatible with the Tamiya TT02B platform. It replaces the standard plastic knuckle arm and installs into the front steering and suspension assembly as a direct-fit component.
In service the knuckle locates the front wheel hub, interfaces with steering linkages, and transmits servo input to the wheel. The aluminium alloy body offers a firmer locating surface than plastic, which aids in preserving steering geometry under load and during iterative setup changes.
Workshop notes: inspect and, if needed, refresh pins and bearings before installation, apply thread locker to steel fasteners per workshop practice, and verify steering geometry after the upgrade. Expect to perform minor toe or camber adjustments when optimising the front end.
Engineers and experienced hobbyists seeking consistent steering geometry will value this alloy knuckle as a robust replacement for plastic arms during tuning and maintenance routines.