For enthusiasts focused on cornering stability and consistent lap times, Tamiya supplies the 54590 Super Hard Inner Sponge set. These inserts are aimed at keeping tyres more stable under high-speed loads and on hot tracks.
Compared to the regular 60D Hard Inner Sponge set, the super hard sponges provide increased stiffness. This added support helps the tyre preserve its intended shape, which aids control during sustained fast sections.
The sponges are suitable for a range of M-Chassis tyres, including 50683, 50684, 51427, 53254, 53340 and 54216. Each set contains enough inserts for four tyres, so you can equip your whole car straight away.
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