Wheel width and weight are big factors in MPG. Tall narrow tires will be better than wide tires. I recently swapped the 30's off my Wrangler onto my Cherokee. No recorded loss in MPG but the brakes require more effort to stop. I'm going to replace the steel rims with alloy and hope that 10+ pound reduction will reduce that effect.peteinsuffolk said:I really want to lift my wrangler and put bigger tires but with these gas prices I just can't justify it.. the lift wont kill your mpg as much as the tires will
How is the ride? Did you change out shockskrash610 said:I own a 04 GMC Sierra 2500 Diesel, which is the same truck as yours. What i did was cranked up the torison bars up front and added a 1.5" lifting block at the rear. I'm running 285/75/16 tires with no problems. i lost about 3-4 mpg with the tire change.