The river wheels rapids matt mckeen signature in silver on black pu are a harder compound from river these pro graphic rapids come in the black pu and silver spoke core design with signature black graphics on the core they look and work great on the street with the harder compound the buff core technology inside the wheel is designed to prevent dehubbing and come with bearing removal slots to make it easier to take the bearings out pre installed with the river flash flood abec7 bearings they