The Mitas C-18 is a soft compound, aggressive tire for maximum performance in extreme terrain. Designed with woods and mx terrain in mind. The C-18 is a softer compound which gives the rider maximum performance at the price of a slightly shorter tread life. Green stripe tire indicates a softer carcass and soft tread compound for extreme enduro or cross country competitions on harder terrains. The tread compound is softer than the yellow-stripe (Super) version and designed for harder terrain.