Six routes in the area called "Sarrabus", in the districts of the Comunità Montane n° 21 (Sarrabus Gerrei) and n° 24 (Serpeddi), near Cagliari. The itineraries cover altogether 262 km. of the numerose tracks in that area. There are many types of road surface and different level of difficulty, for the beginner and for the expert biker, in the natural habitat of the "P.te 7 Brothers" (1023) and "P.ta Sepeddi" (1067) which dominate suggestive landscapes with woods and torrents.