Sleeves5196

Hi guys im new here. I'm buying my second f150 used and noticed the owner changed the tire size and lifted the truck 2 inches. I primarily use my trucks for commuting to work and towing fishing boats and other various trailers on the weekends. What I want to know is with a bigger tire and lift. How will this effect my ability to tow, will it hit my MPG hard and will i loose over performance? The original tires size is 245/75/R16 the new tires are A/T at 265/70/R17 so a 30inch tire going to a 31.5 roughly. Is there any reason I should need to rear gear the truck. Based on the VIN it appears to have 3.55 ratio and 5.4L V8

COStruck

My truck is all stock and has 265/70/R17 with 3.55 diff and 5.4L V8.

Sleeves5196

so I should have nothing to be ctmcwrned about in it.

mbb

Takes some power away.....not enough to notice.

My 5.4 4x4 screw came stock with tow package, lt2657017, and 3.73 gears. I run lt2857017. No problems.

BareBonesXL

It can be calculated.

https://spicerparts.com/calculators/...rpm-calculator

Jbrew

My old truck 5.4L XLT E40D/4R100 265 70 17 wheels/ 3.55 gears....tow package.

Jbrew

Yea that's what most of them are, - it's rare to have gotten 3.73's even w/tow package.