I was looking at the rear tires on my tractor just now, there Goodyear power torque, they don't even seem like rubber, more like hard plastic. Well they are cracked, delamiating and I see a buldge and some cords??? How long do I have on these? Tony Stewart said goodyear can't make tires! Lol,,well I only use the tractor for haying, brushhogging manure spreading ect. I'm thinking firestone r1 radials, but I have them on my smaller ford and they have cuts in them for some reason, so i am wondering? What do you think would be a good choice for tires? Or what kind do you like? Is the firestones good enought, or something else be better?