This JAZRIDER JR-TA201-BK set supplies aluminum front knuckle arm uprights finished in black, intended as RC-scale replacement parts for select TAMIYA touring and off-road chassis. The component is described as aluminum in the product name and serves as a direct replacement for the upright assembly used at the front steering hubs.
Purpose and tuning role: these uprights are used where hobbyists want a metal alternative to stock plastic uprights to affect steering feel and repeatability during setup. As a suspension/steering component, the uprights influence how ball studs and kingpins locate the wheel hub, so swapping to an aluminum part changes the mechanical interface that tuning relies on.
Installation notes: the part is supplied as a set intended to mount to the factory steering knuckle locations on the listed TAMIYA chassis. Verify existing hardware and clearance on your model before installation; some setups may require retaining original screws, ball studs, or spacers from the donor car. No special tools are included with the set.
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