Compression Ignition Addict
Join Date: Mar 2013
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Well. My truck with 35" Toyo M/T's I'm getting 15.2. It just turned 2 weeks old and 2100 miles. I have towed a 13k Skid steer and average about 10.7. I'm please. I will be changing my oil at 2500k and having the dealer adjust the Speedo for the larger tires. I hope it goes up, if not I'm pleased with the truck in everyday. Except the small fuel tank.
stock tires are 34.2", and your MT's are 35" (obviously) The difference there is negligible. I have the same set up and doing the math I think it's off like 3%? That means at 66mph your speedometer is 2mph off.
2013 F250 Lariat CCSB - Firestone Ride Rite, Bakflip F1, B&W 5th Wheel Hitch, Carli 2.5" with track bar, Fuel Maverick 20x9, Toyo MT 35x12.5, Bushwhacker Extend-A-Fender, Weathertech Mats, Recon 3rd Brake and Mirror Lights, PTM Mirror Caps
2013 Crossroads Elevation 3912 - Loaded