Tire Size
 

How does one figure out the size of their tire? In fact, while I'm at it. When should one replace a tire? Thanks.

Hi.
It should say on the side of a tire what size it is.

I tired that, but nothing. All I get is the max pressure.

you could take it to ur LBS and ask them, they could probably figure it out, same with your tire treads, i can't see how bad they are, but ur LBS could tell you taht