Bridgestone BATTLAX BT-020 Sport/Touring Rear Motorcycle Tire 170/60-17 Silica enriched compound offers a tremendous level of grip on both wet & dry surfaces Mono-spiral belt construction (rear) offers high speed stability and shock absorption The letter code in some tire size and rating columns is stamped on the sidewall and the tire label, for easy identification Tires are specifically designed for each model; compounds and constructions will vary to suit the weight, horsepower and handling characteristics of the model for which each tire was designed