Question: how wide are skateboard wheels?
Answer: Each skateboard wheel is mounted on its axle via two ball bearings. With few exceptions, the bearings are the industrial standard "608" size, with a bore of 8 mm (0.315 inches) (or 10 mm [0.394 inches] depending on the axle), an outer diameter of 22 mm (0.866 inches), and a width of 7 mm (0.276 inches).