The aluminium front knuckle arm set is designed for the TAMIYA XV-01 chassis and carries the JR-XV100-BK part code. These parts swap in for the factory plastic knuckles to stiffen the steering pivot and influence front-end response.
The black anodized finish protects the surfaces during normal use, and the knuckles are made to locate on the standard XV-01 steering assembly and suspension pick-up points. Typical fitting requires removing the original knuckles and transferring bearings and hardware before evaluating steering throw and alignment.
From a tuning standpoint, metal knuckles reduce compliance at the hub which can make steering input feel more immediate; when adding such hop-ups, re-evaluate camber, toe and servo loading and confirm there is no binding at full lock to protect other steering components.
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