Firemedic731

Hey y'all,

So I have a 2013 FX4 3.5 v6 ecoboost. The guy before me has what I believe to be 2" spacers up front, which will be replaced with adjustable coils eventually. Right now I currently have 275/55/20 hwy on it. I want to go up in size with an more aggressive looking all terrain, avoiding MTs but I don't want to trim, obviously I don't want any rubbing, and I would like to maintain as much as mileage as possible, but who doesn't right? In an attempt to get the best of both worlds, I was thinking of avoiding 35s and sticking with the 33s, according to my calcuations if correct mine are currently 32s? I am worried that just jumping up to 33s wont give me the look I'm after though and ill be disappointed.

car_doper

Yes, you have 32s. Look at other pics of people with 33s and see if you like it. Otherwise go up.

275 * 0.55 * 2 / 25.4 + 20 = 31.9 ~ 32
width * aspect ratio * 2 / 25.4 + rim size = overall diameter

Chad Walker

I am running 285/65R20 KO2s. They are 34.6". Unfortunately they also weigh 62 lbs. each. It is really going to depend on what is more important.

speeddemon0712

What about 34's? I've heard of a TON of people running a 275/65/20 and not rubbing at all. Your speedo will be off by almost 5mph on the highway though, but you can spend $200 and get a programmer if you want. I HIGHLY suggest you look at the BFGoodrich T/A KO2's.