The Addiction wheel is an indoor wheel designed for tile surfaces (ie Sport Court), but it has an outer urethane hardness between 83-86A! That's right, an indoor wheel with an outer hardness harder than most outdoor wheels. So you know the durability and the speed is going to be incredible with these wheels and they should be at this price. These Addiction hockey wheels grip more than some of the softest wheels on the market! The Labeda Addiction wheel offers unsurpassed, all-around speed and grip. Best of all, Labeda is family-owned, and their wheels are produced right here in the USA. The high durometer urethane outer layer offers remarkable abrasion resistance, ensuring incredible durability. A high durometer, high rebound urethane speed ring boosts roll, resulting in maximum speed. The flex core urethane enables the wheel to flex and expand its contact surface during side-loaded situations while promptly returning to its designated points, thus providing exceptional grip. 78A Hardness ideal for body weight 185+ lbs Triple pour urethane made in the USA