HBrown

Looking at upgrading my tires and wheels and for sure want to go with the KO2's but I can't decide on 33" or 35". So if you have the KO2's please post your tire size and your MPG. Also post your leveling/ lift kit size and engine.

Gadgitz

Don't forget that gears also play a big factor when upgrading your tires to a larger size.

HBrown

Yes that also

BoozeDaily

iTrader: (2)

BFG KO2 275/65/R20 (34.1"), 2.7L EB 3.31, RWD. 20.5MPG lifetime since getting the tires. Getting 23MPG highway with corrected speedometer. No lift yet. Will have a 2.5" front 2.25" rear as soon as my wheel spacers get here.

Nospleen

285/65r20, 5.0 with 3.73, 2" AS level. 17 mpg corrected for speedo, 60% city, 40% highway.

rkfvd3

Mine is even worse than that and I have 3.55 gears. My average now is 15.7 by the computer and even worse when I calculate it by hand (gallons used on the computer are always less than I put in). I still love it tho. It's a truck and I didn't expect to get awesome fuel mileage. Plus I think the tires look so much better than the factory Goodyear's that came on it.

Nospleen

The 3.73's really help with the bigger tires. I have a little stretch on the way home of about 6 miles of 55mph without stops. That helps my average some as well. I rarely do straight highway at 70+.

HBrown

So would higher gears (3.55,3.73) be better for better gas mileage?

Wis_Skier_23

Higher gears aren't better for mileage in general but when you add bigger tires higher gears help get the truck moving easier and burns less fuel than a truck with lower gears. Think of it as when you pedal on a bike. If your gears are too low it's super tough to muscle your way up to speed vs if the gears are higher it's a whole lot easier to get moving. Same concept applies

jhunt47

I have 285/65/20 crewcab 4wd 3.55 lifetime avg by computer is 16.5. These were installed with around 200 miles now have 3800. I have the 2 inch level installed with 20x9 aftermarket wheels. Driving is 60% highway 40% city. I don't speed or drive hard do the posted speed limit.