The JR-TA201-BK kit provides black-finished aluminum front knuckle arm uprights as replacement components for selected Tamiya touring and off-road chassis. Described as aluminum in the product title, the parts replace the factory front upright assemblies that mount the steering hubs.
Role in tuning: swapping plastic uprights for aluminum gives a firmer mounting point that can tighten steering response and reduce flex-related variance during repeat setup runs. Because the uprights define how studs and kingpins locate the hub, a metal part alters the mechanical baseline used during chassis setup.
Fitting information: these uprights are sold as a set to install at the original steering knuckle positions on the stated TAMIYA models. Check existing hardware and wheel clearance prior to installation; some installations require keeping original screws, ball studs, or spacers from the donor car. The package does not include specialized tools.
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