ledgeman i have had 27 on mine and now i have 26's. you will find it harder to get the rears in the odd sizes you may want to look at a tire wheel combo with aluminum rims. thats what i did to mine i upgraded tires and wheels at the dealer before i took it . if you shop around you can find deals on four tires wheels and lug nuts for about 500 to 550 bucks depending on the tire. you will definately like the way the new tires hookuo compered to your old goodyears. if you got any questions pm me ill get back to ya..... peace