A Durometer is an instrument that measures a wheel's hardness and there are two 'similar' scales commonly used. American hardness ratings use the 'A'-scale with numbers ranging from 72A to 105A, while European hardness ratings use the 'D'-scale with numbers from 45D to 61D. The hardness rating is a particular wheel are often labeled onto that wheel.

The higher the rating; the harder the wheel. The lower (softer) ratings are usually used for outdoor and inline wheels (78A-88A), while the higher (harder) ratings (93A-103A) are indicative of Speed, Artistic, Jam,  Rhythm, Roller Derby and Freestyle. It is always best to call Victoria to ensure you get the right wheel for the best choice based upon your type of skating. Call toll free now at 1-866-438-4997!