Spacers
I got this kids angry birds pennyboard from facebook marketplace. The wheels were dried up, the bearings had no grease left. It needed an overhall.
I have a bunch of spare wheels & bearings in my workshop room and put them on.
BUT! the wheels were too big and touched the board when you turned. SO it immediately stops and you fall off.
AND! the diameter of the trucks that attach to the axle (the hanger) holding the wheels was too big and locks up the bearing when bolted all tay down, because it touches the outer rotating part.

Truck Spacers

https://www.longboarderlabs.com/anatomy-of-longboard-trucks/


- you could just use longer screws with nuts or washers on inside?!
Axle Spacers
- Traditional width: 8mm
- Stronger axles: 10mm
Need either: 8mm or 5/16" washer (7.94mm) washer
Extra Links
how-precise-are-your-cast-trucks-the-longboard-truck-showdown-part-1