Introducing Sportmax GPR-300 - The Sportmax® GPR-300 is a radial tire that offers well-balanced sport performance for a variety of sport bikes. Value: Designed to offer a balance of performance and value. Handling: Because bikes are meant to lean over. Radial tire technology helps to provide enhanced grip in wet and dry conditions. Optimized construction to enhance handling and responsiveness for street-going sport riding. Aggressive sport-derived tread pattern for enhanced on-bike appearance. Tire Specifications: Load / speed index: 54H. Sidewall: Blackwall. Recommended rim size (inches): 3.00. Overall diameter (inches): 23.1. Overall width (inches): 4.3. Full tread depth (inches): 5/32. Maximum load (pounds) / PSI: 467 @ 41 PSI. Construction: Radial.