In some rare cases, longboard trucks may have 10mm diameter axles. In this situation it will be imperative to opt for bearings with an internal ring of 10mm. This axis format is less and less common. Some examples of trucks with 10mm axles: some models of Surf Rodz, old Bear Smokey, Randal Comp 10mm.

Skateboard bearingsize 608

The half-spacer generally measures 5mm. Built-in bearings are only compatible with wheels with 10mm spacing between bearings, which is the case for almost all skateboard and longboard wheels. This format is not compatible with roller skate wheels and Kryptonic brand wheels (8mm spacing). It is also not recommended to use built-in bearings on aluminum core wheels.

Skateboard bearing specschart

In roller skating, some skates adopt 7mm diameter axles. This format, which is not widespread in Europe, requires specific bearings with a 7mm internal ring.

- Deep cleanning: Remove the shields and soak the bearings in acetone (preferably use a specific bottle); then dry the bearings, then re-lubricate the balls with a specific product such as Bones Speed ​​Cream or Riptide Speed; Reassemble the flanges. This cleaning is the most thorough and if done well, gives a second life to the bearing. (it is also possible to use an ultrasonic bath to remove all impurities from the bearings beforehand)

Skateboard bearingsize chart

The Abec classification is an industrial rating, and does not take into account vibrations and shock resistance which are essential parameters in skateboarding.

Some of the best manufacturers of skateboard bearings such as the world leader Bones have chosen not to use the Abec ratings, judging this rate too misleading.

- Easy cleanning: Use a bearing lubricant & cleaner such as Skanunu. In this case, there is no need to disassemble the bearing.