This JR-TT2B01-BK front knuckle arm set is an RC-scale steering component made for TAMIYA TT-02B and DF-02 chassis layouts. Machined from aluminium and finished in black, the parts replace common plastic knuckles to increase rigidity where the steering links and wheel hubs attach. The units are intended as direct-fit upgrades for model-level tuning and do not alter vehicle scale systems beyond the chassis models specified.
Installation is straightforward for hobbyists familiar with basic front-suspension disassembly. Remove the stock knuckle arms from the hub carriers and fit the aluminium replacements, keeping track of the wheel hub pin, e-clip, and any shims or bearings that sit between the hub and knuckle. Confirm tie-rod alignment and verify the steering linkage clears the new arm through full suspension travel. No special tools beyond common hex drivers are required.
On-track, the aluminium knuckles give firmer steering feedback and more consistent geometry under load compared with softer plastic parts that can flex. This helps when refining toe, camber, and steering response for on-road or light off-road sessions. After the first runs, inspect mating surfaces and fasteners and re-tighten where necessary.
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