Idea of Skateboard Wheel Icon
This looks like a circle, with a crescent moon connected to the right side of the circle. There is a much smaller circle inside of the large circle, in the shape of a waning gibbous moon.
This Skateboard Wheel icon is made in Material Design style
developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 6,200 icons, all in the same style and quality.