The Maxxis Detonator, with its dual compound tread pattern, provides a durable training tire with a race pedigree. Softer silica compound on the outer edges of the tire, paired with the grooved slick tread design, allows for great traction in a variety of road conditions. The Detonator is durable enough to provide plenty of winter miles, yet supple and grippy enough to race on in the summer. M shaped grooved tread pattern. Dual compound 57a outer62a inner. 57a outer compound provides cornering grip. 62a inner compound provides long wear and low rolling resistance. Training tire. Silkworm protection.