Well at least they're clean. :lol:
I'm not sure what it is on the roads around where I live but tires get a permanent nasty look after a couple of months.
It's not really dirt, it just turns the tires brown and you can't seem to scrub that shit off.
I'm thinking about buying some carpet or tire brushes to put in a drill and just going fucking crazy on my cars tires, hate that shit. :lol: