I have really good studded winter tires that I used one season on my 1989 Thunderbird. I was wondering if they would fit my 1991 Chevy Z24. Seems a waste to buy new ones when these could fit. Vehicle with P205/60R15 tire size fitting tires sized P205/70R15? The winters are not on rims, so will they be able to be mounted on my current rims? A quick answer would be much appreciated as I drive through the mountains in 3 days time, and only today found out it's snowing up there! *shudder*