hello i have a guy with a set of stock rims on a 91 2dr. tracker that i wnat to buy because of the 235/75r15 tires on them. I have a 1997 4dr. sidekick sport, with 215/75r16 tires. Will the 15's fit without any big problems?

The Sport models have larger brakes, 15's may rub the calipers. Also, the 16" rims on Sport models are 6.5" wide, 15's are 5.5" wide. You will have less track width, possibly a rougher ride and they will appear to be inside the fender well more. A similar height 16" tire is 235/70/16