For a long time I’ve used these rear hub spacers: Shifter & European Go Kart Parts | Axle Parts - 50mm | Axle Wheel Hub Spacer Kit 50mm
I like them because it allows for easy width adjustments along with not having to clamp the hub so tight that I strip the bolt to keep it from moving inward.
Recently I was trying to switch between the standard length axle on my kart and a cut short axle, but I wasn’t seeing the same differences that my brother was who uses the same kart but no hub spacers. It got me thinking, since I’m filling up what would normally be empty space in the hub with 50mm rings that butt up against the inside of the hub, am I effectively lengthening any axle I use these spacers with?
Imagine the black portion in the hub would be open space if not using the spacers, but with the spacers they’re filled with metal which is connecting the axle all the way to the end of the hub. So am I crazy here?
To answer the next question, no I didn’t yet test out using the spacers vs not using the spacers back to back.