What is the biggest, meatiest, tire I can fit on an 03 FX4 using the stock 17'' rims? The only thing I have done to the suspension is lifting the front end up 2.5'' by cranking the torsion bars... I am willing to do some minor trimming if necessary, but I don't want any rubbing... Would 33's work, or even 35's?

 

35's will fit, absolute biggest, but they will rub at full lock. Your best best is going to be a 305/70R17 wich is basically a 34x12.50ish, is what I will be going with next time. Not a lot of tires available in that size, but Nitto TG, GY Wrangler MT/R, MAxxis Bighorn and Bucksot are.....

 

how bad would a set of 35's rub at full lock, enough to affect anything, or not really? would it be correctable?

 

I am not so sure you are going to be able to cram a 35 in there without a body lift at least. If you are able to, I foresee A LOT of rubbing. On our models 97-03s, I think a 33 is as big as you can go with just cranking the T-bars and minor trimming.

Wandell, your expertise please... I know on the 04s and up you can stick a 35 on there with a leveling kit and no lift, I think a 33 is going to be as big as you can go.

I've got 35s and they are pretty tight, but I also have a 3" BL. I think you should verify this before you buy 35s...

JK

 

35's will fit using the oem wheels, but they will rub the frame at full steering lock. It won't hurt anything. I personally would stick with 33's if you are not gonna lift the truck.

 

I repeat Hijack in progress.

Another game of will it fit? 20x10 motto 700 4.5backspacing and 33x12x20 Iroks fit on a none lifted 03 F150 4x4?

 

03FX4150, A 10 inch wide wheel with 4.5 inches of backspace should fit with trimming of the lower front valance and cranking the T-Bars as far as i know. I think Wandell has pics of his at stock height with 33's.
Finally wear those 34's out??

 

yeah driving 180 miles back and fourth from school to my house everyweekend puts a toll on some tires. The buckshots are nice but I was stupid and didn't rotate and keep up the tire pressure like I should have.

 

Yep, they will fit your 03. You will just have to trim the front bumpers lower plastic valance slightly.

 

I've heard that 33 12.50 17 tires on 17X7.5 stock rims might "bow" out in the middle of the tread and not make them wear as good as they should(do to a 7.5 rim). How many miles should you get out of a 33 MT tire if rotated on a stock rim. Any testimonials?

 

A member at FTW got about 60,000 miles out of a set of 315/70-17 BFG AT KO's mounted on his OEM 17x7.5 inch wheels. You are correct about wear. Sometimes running a tire on too narrow of a wheel can cause the center portion of the tire's tread to wear slightly faster than normal. You have to watch the air pressure. I'd recommend no more than 40 psi for daily driving.

 

I just put 295/70-17 on my 02 FX4 rims. I wish I would have went with the 305's but the price was right on the others.

 

The reason I asked the question originally was I love the look of the stock FX4 rims but planned to lift the truck in the future and wanted to see how big I could fit on the FX4 rim befor deciding on a lift. I am not must for any ofthe aftermarket rims out there and prefer the OEM styling.

Here is what I have learned:
33"s should fit on the FX4 rims
The FX4 stock rim is 7.5"s wide

But how can you tell how tall a tire is with just the number printed on them? (i.e. 295/70-R17)
I know how the numbers work, but they are all in metric except the rim diameter one

Thanks again for all the answers?

 

THere is a conversion table available if you do a search for "tire conversion calculater". You can also get the exact height and width on the manufacturers websites.

 

Googling now.....


and you misspelled calculator, Google picked it up when I copied and pasted your words

http://www.redrock4x4.com/tech/tire_calc.php