I've got a question, I have a 1995 F150 with a 5.8 liter engine and an E40D transmission and I was looking at bigger tires. It's got 31X10.50R15 right now and I was thinking of the getting 33X10.50R15, would that decrease my milaege and power a lot, or would it not be too noticable? I was also thinking instead, going for the 32X11.50R15 or would those be worse? Also I've got 3.55 gears on the rear.

Thanks all.

 

well without any more upgrades, i would go with 32's.

 

Yeah, I agree with Chelios on the 11.50 x 32 tires.

Gas mileage will decrease approximately 1 mpg (Average driving)

Power loss will not be too noticeable with the 5.8L engine.

Taller & wider tires weigh more pounds per tire and being taller;
it takes more fuel to get them rolling and keep them rolling.

FYI: 12.50 x 33 tires will fit as long as a stock truck is not driven in mud-bogs or travel deep rutted back-roads; because the f & r fenders will go down on the taller & wider tires and not only scrape the tires, but may wedge the fender against the top of the tire and make a stock 4WD truck unmovable until ...

I had 11.50 x 32 BF Goodrich KO's and I purchased 12.50 x 35 BF Goodrich KO's,
my fuel mileage dropped 2 mpg on average driving.

Hope this helps!

 

Thanks for the info! But my tires won't be rubbin' because I'm going to get a 2" leveling kit, actually I heard that the taller skinnier tires would be better because there would be less contact on the road, but they would be harder to get moving and keep going. About 1 mpg? that ain't to bad at all, I was thinking about 3 mpg or so.