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Put a set of these on my 2002 Ranger, 31x10.50 - 15. I have about 1500 miles on them now, with a bit of dirt roading and a day spent in the sand and a little mud down at Ocala Forest. No complaints about the on road performance aside from the noise, which was about what I expected it to be. Seemed ok on the trails, though I am pretty conservative and never pushed their limits. We'll see how long they last.
One interesting thing about this -- going to these tires from the stock 235/75R15 did NOT reduce the gas mileage. Yes, the speedometer is off now, and if I went by the in-dash odometer to calculate gas mileage I would think that the mileage went down because with the larger diameter tires (31" vs about 29") the truck actually travels farther than a mile each time the odometer registers a mile.
I have a scanguage II. This is a device that communicates directly with the vehicle's computer through the OBDII port, and picks up various parameters including the each revolution of the wheel (through the ABS sensors). It's easy to calibrate a scanguage using a GPS as a reference. It also measures fuel flow and so you can get a pretty accurate MPG reading.
With the old stock size tires I calibrated the scanguage and discovered that on my commute to work, mostly highway miles, I was getting a pretty consistent 20-21 mpg. This is with a 4.0 SOHC, 5 speed, and 4.10 gears, running exactly the speed limit using cruise control whenever possible. Temperature, traffic conditions, air conditioner and such might vary it a little, but not much -- the truck is very consistent.
With the new tires, and the scanguage recalibrated so that it is reading exactly consistent with the GPS, over the same commute, the result is . . . 20-21 mpg.
One interesting thing about this -- going to these tires from the stock 235/75R15 did NOT reduce the gas mileage. Yes, the speedometer is off now, and if I went by the in-dash odometer to calculate gas mileage I would think that the mileage went down because with the larger diameter tires (31" vs about 29") the truck actually travels farther than a mile each time the odometer registers a mile.
I have a scanguage II. This is a device that communicates directly with the vehicle's computer through the OBDII port, and picks up various parameters including the each revolution of the wheel (through the ABS sensors). It's easy to calibrate a scanguage using a GPS as a reference. It also measures fuel flow and so you can get a pretty accurate MPG reading.
With the old stock size tires I calibrated the scanguage and discovered that on my commute to work, mostly highway miles, I was getting a pretty consistent 20-21 mpg. This is with a 4.0 SOHC, 5 speed, and 4.10 gears, running exactly the speed limit using cruise control whenever possible. Temperature, traffic conditions, air conditioner and such might vary it a little, but not much -- the truck is very consistent.
With the new tires, and the scanguage recalibrated so that it is reading exactly consistent with the GPS, over the same commute, the result is . . . 20-21 mpg.
