The Revision Asphalt Pro Wheels were reformulated by Revisions dedicated chemists and engineers, who have now designed a wheel that has superb grip, speed, and durability on tough outdoor surfaces. The Revision Asphalt Wheel is built to last with its street-level hardness while maintaining skating performance needed in turns, stopping, and speed. Made in the USA Standard 608 bearing size fits all roller skates 90A Pro outdoor hardness for asphalt and concrete surface Wheel Hardness Body Weight Level of Play Surface 90A Up to 275 lbs Elite Outdoor