Bridgestone Motorcycle Tires - Serving society with superior quality. Motocross front tire designed specifically for hard pack surfaces. The best choice for "Blue Groove" hard terrain. Unique casing profile and tread design for maximum cornering grip. Tire Specifications: Overall diameter (inches): 24.7. Tread width (inches): 3.0. Tread depth (inches): 10/32. Approved rim size (inches): 1.40. Maximum PSI: 32.