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I'm wanting to put some Nitto Ridge Grapplers on my 2017 4x4 ecoboost stock 20" wheels. I'm not sure if I should go with 275/60/20 or 275/65/20. (33" or 34")
I have a 2" Rough Country leveling kit and I took the side steps off which in my opinion looks better.
I drive on the highway mostly but want that aggressive look of the hybrid all terrain ridge grappler without losing a ton of gas mileage.
I've heard that 34's might looked a little crammed with a 2" level. But if the mpg isn't a huge difference between the 33" and the 34" I'm curious which of the two tire sizes would look better with my setup! Any thought would help. Thanks!
Last edited by jacksoncapps; 06-13-2018 at 11:24 AM.
I just went from stock 18's to 285/65/20 Ridge Grapplers on a 2.5" lift (the 285's are 34.8"). Great tire, much quieter than I anticipated. In your case, either tire will fit fine. Also with the 285's I have no issues with rubbing on crash bars or fender liner with a +20 offset aftermarket rim.
Depending on the tread pattern of the tire you are coming from, the mileage will suffer slightly with the ridge grapplers, but only because of the tread pattern/rolling resistance. I haven't re-calibrated my speedo as of yet, so at a 60 mph reading currently, I'm actually traveling at 64 mph. Used a GPS to figure that out. That will also cause your gas mileage to be a little different until you re-calibrate.
Tires don't have much effect on MPG, until you go huge. Otherwise, they only affect the odometer, which throws off your MPG calculation - not the actual MPG. If you correct the speedo/odo, you won't see a substantial change in MPG for minor tire size changes.
Tire weight will have a huge effect on MPG's. I went from stock 275/65-17 Goodyears to BFG KO2's and lost about 4mpg. The tires were drastically different in weight and it takes more fuel to get them rolling.
Go to TireRack, look up each tire's weight, multiply by 4, subtract the originals' weight from the replacements', and post this "drastic" number. I bet it's less than YOUR weight. Does your truck's MPG drop by 4 when you have an adult passenger? Then divide by the truck's curb weight. Post your result, which will be the percentage increase in the truck's weight. I'm betting it's less than 0.01.
Originally Posted by SteveLord
More weight = less gas mileage? What a concept......
Right, just like the dust on the w/s. More weight, right? So it MUST decrease MPG, right? Yes, but NOT ENOUGH TO NOTICE OR MEASURE.
06-13-2018, 11:22 AM
Which tire size? MPG effect!
