Kyosho OTW131 Mold Inner Sponge 50mm Hard Insert for OPTIMA Classic Series  [KY-OTW131B]

Boost Turbo Optima handling with Kyosho OTW131 Mold Inner Sponge

The Kyosho OTW131 Mold Inner Sponge is made for the Turbo Optima family, offering a close-fitting insert that follows the tyre profile. Its hard compound is aimed at improving traction on high-adhesion road surfaces while keeping tyre shape consistent.

Built for sticky on-road surfaces

This moulded inner sponge is crafted for drivers who run on smooth, high-grip circuits. The 50mm diameter matches Turbo Optima tyres and helps deliver reliable contact and predictable handling during practice and race sessions.

Precision fit for steady control

With accurate moulding, the Kyosho OTW131 sits firmly inside the tyre to reduce distortion under load. The harder composition helps the insert retain form, which supports stability when cornering and accelerating.