Originally Posted by semtex

It means if you want, you can flip the tires from right to left. Personally, I don't really see the benefit of this unless you happen to always corner hard in one direction only, then I could see how over time one side might wear down more than the other.

You know, I did not notice this until you pointed it out! But you're right. I doubt it'd have a functionality impact though if all four wheels were 'backwards'.