The Tamiya 53319 - Rear Inner Sponge Set is intended to refine rear tyre behaviour on RC Boy's 4WD models. These inserts are cut to sit inside the tyre carcass, helping to preserve the intended tyre shape and deliver steadier grip through corners. The material is chosen for repeated use and reliable support, making it a sensible part to add when dialing in rear-end balance.
Proper inserts reduce tyre squirm and help the tyre maintain consistent contact with the surface, which results in improved traction and control. Whether you are running tight club tracks or rougher off-road loops, the sponges offer a simple way to stabilise rear handling without complex mod work.
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