Pirelli Enduro/Rally Mousse Set – 90/90-21 Front (E-21C1) & 140/80-18 Rear (R-18H1) Foam Inserts | Flat-Proof Off-Road Tire Inserts | Medium Compound | NHS

Upgrade your Enduro or Rally setup with genuine Pirelli Mousse foam inserts sized for popular off-road combinations: 90/90-21 front and 140/80-18 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 sidewall support demanded in competitive Enduro and Rally environments.