The Race Reds skateboard bearings from Bones Bearings have been newly upgraded with higher quality bearing steel and precision ground, built-in spacers to ensure perfect spacing between the bearings. The precision-ground extended race eliminates the need for speed washers by improving bearing alignment when the axle nut is tightened. Bones also added a groove on the inside of the bearings' inner race that allows you to use the Bones Bearing tool to easily insert and remove the bearing, even on hub wheels.