The Pirelli GM Historic Gravel Rally Tyre is designed for classic rally cars where the homologation has expired, such as Escort Mk2, Opel Kadett, Vauxhall Astra, Peugeot 205 and many more. The GM tyre features a tread pattern with 3 distinctive areas which ensures optimum performance on dry, damp, wet or muddy surfaces.Inside tread block have large grooves for high levels of grip and control under brakingCentre blocks provide directional stability on straights and when corneringOuter blocks are specially designed to remove gravel and water in wet conditionsThe GM classic gravel rally tyre is available in a range of compounds to suit differing road surfaces and weather conditions.GM4 - Medium compound suitable for dry conditionsGM6 - Medium soft compound suitable for dry and damp conditionsGM8 - Super soft compound suitable for damp and wet conditions