Mousses are rubber foam equipments which ??beside preventing flat tyres during through off-road sections ??feature dynamic properties capable to make faster, more efficient or simply effortless the off-road racing. PIRELLI mousses are intended to replace inner tubes in off-road tyres for both motocross and Enduro competitions; once fitted, PIRELLI mousses simulate an equivalent inflation pressure to 0.7bar /-0.1, far below the pressure advised for on-road use. Particular attention must be then paid to suspension settings when racing with mousses. PIRELLI mousse are marked NHS, which means they must not be used on public roads. When fitting a mousse, the mounting lubricant gel must be spread completely inside the tyre, avoiding the beads. PIRELLI mousse are available in 12?? 14?? 16?? 18?? 19??and 21??fitments, and must be fitted using PIRELLI mousse gel.