Skateboard Bearing Spacers - What's the point?

Bearing Spacers seem to be one of the most mysterious components in skateboarding. They really shouldn't be, but there's not much accurate information or guidance out there coming from the manufacturers. Bearings can be found in many, many mechanical devices and rumour has it skateboard bearings originally came from sewing machines (?) I don't know how true that is but what I do know is there's an awful lot more accurate and detailed information about bearings coming from the mechanical engineering industry where they are most used and that's where the basis of my information comes from, its well documented and standardised.
However, What I'm talking about today is bearing spacers and why you should used them and how they should be correctly chosen and installed for best fit and performance.
I hope you find the video useful.

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#Bearings #Spacers #Skateboard