something else to consider, at least the way i'm looking at it.

fact, the harder the rubber the longer it would last in use(tire). i know this isn't directly related or a rule, just a guide i'm using. the higher the number the harder the rubber. with this thinking, if looking at a 380 tire and a 180 tire, or quality brands! , the 180 will be of softer compound and should have better traction. this isn't going into looking at tread design and wet handleing, but its just how im looking at thing while choosing.

with that said, for my daily driver, i'm searching for tires with a rating of 280-350 or so. i need something that'll last all my miles i put on the car daily, but i also am a spirited driver, so i don't want something like my cousins T/A is using that spin and slid all over the place with a rating of 420.

somebody will chime in if i'm wrong, and i'll learn. but this is my uneducated way to semi judge what i'm looking at.