300six

Hi guys,
I'm new to the forums and have a question. I call my local tire shop for new tires. He asked the size and I told him tire tire size for my truck 235/75/15. He was suprised such a big tire was on that truck and said I should go to 225 for better fuel mileage. 235/75/15 is the right size for this truck, any thoughts.

Edit: It's a stock truck. 4X2, no lift..nothing.

91351

well those are stock tires. i recommend 275/60/15. they look good. theyre about an inch shorter than stock. you could put 31/1050/15 on there if you really want. its your call.

Uncle Tony

I use what the vehicle manufacture indicates. My '96 F150 2wd runs 235's as well.

mitchalvin

Sounds like the tire guy does not know anything or that they have an abundance of 225. Switching to a smaller tire will not help increase fuel mileage and will more than likely overload the smaller tires.

I had one shop try and tell me that my car took 225 75 15 instead of the 235 70 15, after much discussion and him even looking at the door sticker he still insisted that I and the manufacturer did not know what we were talking about and that I should put the proper 225 tires on the car, needless to say I told his manager that I would never go there to look for tires since there were only idiots working there.

dewman

My 1996 F150 4x4 runs on 265/75/R15 tires, stock size.
I currently run 31x10.50x15's and they are virtually the same size as the stock tires. I get 18mpg on the highway, as long as I keep my foot out of the pedal.

dirtcrew51m

Me too. I use 31 10.50 15 on my 150's. They are and look like a truck tire. Besides there is no such thing as one tire getting better mileage then another. There are too many variables such as vehicle weight, driving style, etc. The only mileage on tires is tread wear mileage. Keeping the tires at the proper air press is the only way to get any mpg.

tleach17

I'd say if you like the size you have on it then go with those again. You wont really notice to much MPG's moving down one size. My dad tried running smaller tires on his bronco and all it did was wear the tires out way to soon because they were overloaded.

mitchalvin

Unless you recalibrate your speedometer it will be off therefore giving you the impression that you get better mileage than you actually do. The opposite is true if you go larger on tires, the p series tires will give one slightly better fuel economy due to the less mass of the tire. This comes with a lighter load carrying capacity, even though the xl tires have a higher rating than the same size LT tire you have to reduce the listed amount by 10% to 15% for use on a truck or suv.

floyd57

i run 31x10.50x15 on my 96 4x2 and they havent affected my fuel mileage any and they look a lot better than the stock tire size i was running prior