The Kyosho UM578B Front Knuckle & Hub Carrier Set upgrades the Ultima SB front suspension with components that promote crisper steering input and reliable tracking. These parts are intended to reduce unwanted movement in the steering assembly and help maintain consistent handling when running on uneven tracks.
Built to withstand repeated impacts, the knuckles and carriers provide a stiffer, more controlled front end that helps limit wear on bearings and linkages. The accurate fit helps the steering feel more direct and repeatable, which is useful for drivers refining setup or stepping up to faster pace driving.
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