I found a set of rims and tires on my local craigslist for 250, which includes the rallies and tires. The tire is a 255/70/15. How much of a difference is that from a 225/75/15? Also is the lug pattern the same as my 1977 Vista Cruiser? Also is this a good price? or should I walk away? http://tucson.craigslist.org/pts/2986964065.html
A 225 75 15 is 28.3 inches in diameter. The 225 70 15 is 27.4 in. dia and the 255 70 15 is 29 in. diameter. So the two sizes he has for sale kinda split the difference. They will fit your Vista as they both are 5 X 4.75 pattern. Price seems fair, might offer a little less if no center caps....... if the tires are starting to dry rot, you may not want to run them at highway speed.