The hardness of a skate wheel is also called the "durometer". For most wheels, durometer is measured on the A-scale, with 74A being a very soft wheel and 95A being a very hard wheel. The hardness of a wheel will affect its durability, shock absorption, speed and ability to grip an indoor or outdoor skating surface. 

NOTE: All Gunslinger set up's come standard with any Gunslinger Wheels and bearings.  

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