Pirelli Motocross Mousse Set – 80/100-21 Front (X-21B2) & 110/90-19 Rear (X-19E1) Foam Inserts | Flat-Proof Off-Road Tire Inserts for MX Dirt Bikes | Medium Compound | NHS Silicone sealant The tool storage box connects

The tool storage box connects with other PACKOUT system components via integrated locking cleats

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Made from high-quality thermoplastic polyurethane (TPU)

Pirelli Motocross Mousse Set – 80/100-21 Front (X-21B2) & 110/90-19 Rear (X-19E1) Foam Inserts | Flat-Proof Off-Road Tire Inserts for MX Dirt Bikes | Medium Compound | NHS Silicone sealant The tool storage box connectsUpgrade your motocross setup with genuine Pirelli Mousse foam inserts sized for the most common MX tire combination: 80 100 21 front and 110 90 19 rear. These medium compound rubber foam mousses are engineered to replace conventional inner tubes, delivering puncture proof reliability while maintaining a lively, consistent ride feel. Once installed, they simulate roughly 0. 7 bar of pressure, providing excellent traction, agility, and side wall support