The Powerslide Spacer Aluminium 8mm is an aluminium spacer that is suited for 8 mm axles and for 608 bearings.
Every inline skate wheel needs two bearings AND one spacer between the bearings.
You could think that the bearings could be separated by the plastic hub at the inside of the wheel, but this material in plastic is not strong enough to keep the bearings separated during the forces that exist when you propel the skate. That is why you need a spacer between the bearings.
If you doubt whether you need a spacer with a 6 mm or an 8 mm axis, then use this rule of thumb:
- for an inline hockey skate with four wheels, you need spacers with a 6 mm axis, that are displayed on this page: https://www.slidingtiger.eu/home/Bearings?product=PS900420
- for all other inline skates (inline hockey skates with three wheels, fitness skates, aggressive skates, freeride skates etc.) you need these spacers with an 8 mm axis, that are displayed here.
Spacers are packed per 8, so one pack is suited for one pair of skates.
These Powerslide spacers fit skates of other brands too. Is is also possible to choose FR spacers
when the FR brand has your preference.
A little remark: the colour of the spacers can deviate from what is displayed on the pictures. (But because the spacer is a skate part that is entirely invisible, this is totally unimportant for most people.)