Whether you'rer looking to go hard surface racing, or just need to be more caring of the turf, the Speedracer is the tire for you. New front and rear specific tires designed for ATV / Utility turf / hard surface applications. Excellent design for ATV supermoto and dirt track racing. Note: NOT legal for on-road use. Tire Specifications: Ply rating: 4. OD inches: 24.71. OD mm: 630. SW inches: 9.18. SW mm: 234. Maximum load: 420 pounds / 190.91 kg. Maximum PSI: 7. Tread depth: 9.5 mm. Weight: 21.43 pounds.