I don't know the best way to explain this but going to try my best. I have two tires that look perfect and basically new they are in the front of the jeep. In the back i have one tire that's like new kinda warn out but it will do and then i have a tire that's so bad, that when i drive all you hear is a extremely loud noise from it going around and around. I wanted to throw it on the spare because i don't have enough money to pay for over size off-road tires. but i did the tire rotation on paper and what will happen is i will have three good tires and one old one. is that alright to drive around with ?