Pirelli mousse has been developed to replace the inner tube in off-road competitions. When fitted, a mousse of the corresponding size provides an equivalent inflation pressure of 0.7bar +/-0.1. This means that particular attention has to be given to the tuning of the suspension system. Pirelli mousses are marked NHS meaning they must not be used on public roads. When fitting a mousse, the mounting lubricant gel must be spread on the whole inside of the tyre cover, avoiding the beads. Pirelli mousse's DO NOT come with fitting gel