Thank you sir. I've got the skid patch thing down. My ratio is 44/17 and therefore I have 17 skid patches. I guess I could go up to 48/19 or so if I want 19 patches but I don't think the benefit outweighs the cost.

Anyhow, I don't actually have that many skid patches if I always skid with the same foot forward - I actually have only 50%, right?

I was just wondering if certain tires or tire sizes have reputations for lasting longer than others?