Shinko flat Track tires are designed and tested to perform at the highest level of the sport. The SR267/268 is available in three different compounds to give you the best tire for any track. Available in Soft - Medium - Hard compounds. Proven performance. DOT approved. Tire Specifications: Compound: Medium. Load / speed index: 67H. Recommended rim (inches): 3.0. Overall diameter (inches): 27.00. Overall width (inches): 7.00. Maximum load (pounds) / PSI: 677 @ 42 PSI. Construction: Tube type.