okay so i bought the srt 8 replicas awhile go for my 08 jeep grand cherokee laredo. since then ive been having nothing but problems trying to get tires. one place told me u cant put different size wheels on a four wheel drive car and i was gonna put on a 275 on the rear instead of a 285 because they r hard to find and they tell me the tire wont be able to hold the wait. just wondering wut other people r doing when they do this and wut sizes and wwhere. any information would be great.