•RollerBones Premium speed/derby wheel with an extruded aluminum hub.
•Superior roll and speed. And only available Here you can Mix them for Derby!
•Available in 85a, 88a, 92a, 97a and 101a. Also available in a mixed set of 4 and 4 of any 2 hardnesses. If 4 and 4 selected, please note at checkout which hardnesses you would like.