2thousand5.4

Ok so my truck came with 265/70/17s and the set I have on there now has worn out so I ordered a set of treadwright gaurd dogs in 285/70/17s. I got them with good year mtr side walls and my Fed ex shipping statement says they are 65 pounds a piece. My current tires a uniroyal larados and I'm not sure how heavy they are. So they will be here Friday and be put on Saturday and I was wondering how many miles per gallon I can expect to loose. I will be recalibrating my speedo with my tunner.

O and the truck has the 5.4 and 3.55 gears

BassAckwards

Well considering its a LRE tire with a 3 ply sidewall and how heavy they are you can expect about a 2mpg average loss your gears aren't bad but they aren't the best either.