The Toyo M137 is an extreme long haul steer tire for operations running 15K to 20K miles per month. This high mileage tire minimizes irregular wear resulting in maximum removal mileage. This is due to the optimized 15/32” tread depth with top DG, engineered to reduce free-rolling wear and tread squirm. The enhanced high-speed casing and E-balance profile extends the casing life and contributes to overall casing durability. Expect excellent performance and safety from the M137 as the four-straight grooves, computer-optimized tread design, deep sipes and multi-pitch grooves give this tire wet and dry traction while reducing road noise.