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Do you really need the AT tread design? My Excursion is our dedicated TT tow rig, sees no off roading and I try to keep it off the road for Winter to avoid the salt and rust. I run the Nitto Dura Grapplers that are the rib style highway tread and am seeing a little better mileage than most others with similar size vehicles and tow combo weights. It's 6.8 liter V-10 gasser and sees 8 to 9.5 MPG on highway towing trips at 65/68 MPH with a combined weight of 19,500 lbs. I feel that these super quiet LTs are part of that result, these are the quietest truck tire I have ever used, you just don't hear them. The tires are oversized at 305/70R18 (35.28"X12.8") being turned by 4.88 gears on a 4" lifted EX. My daily driver is a '94 Metro XFi, so that's helps to soften the blow of the fuel cost from the long towing trips.
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