The Yokomo ZR-039MA Medium Mold Inner targets 1/10 scale touring cars fitted with medium narrow 24mm tyres. Its slim construction creates a controlled gap between insert and tyre, encouraging fuller contact with the surface and enhancing traction for tighter lines.
By promoting a broader tyre contact patch, the ZR-039MA helps reduce sliding and improves turn-in precision. That makes it useful for drivers tuning suspension and steering to extract quicker lap times.
Designed to work with chassis such as the MRTC-YD2 and MRTC-YD2CK, this inner integrates without major setup changes and suits racers who want a simple handling upgrade.
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