There is no difference between the skateboard and longboard bearings. Regardless of the size of your wheels or type of skating you do, street skate or longboard, the bearings are the same size. The only thing you need to pay attention to is the dimension of the bearing spacers.

Bearing spacer has two measurements, one is the axle diameter and the other is overall width. The first measurement, the axle diameter, is generally 8 mm for most skate trucks, regardless if they are meant for skateboarding or longboarding.

But to make sure you'll have a good fit, you should pay attention to the second measurement, the overall spacer width. A common overall width for skateboard bearing spacers is 8 mm, while for larger longboard wheels you'll need a 10 mm spacer.

The same applies to built-in bearings, which are described in more detail later in this post. If you're buying them for smaller wheels chose 8 mm x 8 mm and for larger longboard wheels the measurement should be 8 mm x 10 mm, presuming you're skating on commonly used trucks.

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