Hey guys, i just bought an 06 4x4 5.4l F150. The tires i have on it right now are 255/70/17. I'm new to all this so i was wondering if anyone could help me out. I'd like to know the biggest size tire i could get on here without having to lift the truck or do any sort of modifications. I really couldnt do any modifications by myself and dont have the money to have a mechanic do it. But still i'd like better tires and hopefully a little bigger than what i have on now. Any info would be appreciated, thanks.

 

Well since you don't want to lift it 33's would be the max, but for 100 bucks you can get a leveling kit and run 35's.

 

Well, whats the biggest size tire i can get on the 17" rims? I know tires can be expensive, and i'm sure new rims are even more expensive so i'd like to just do what i can with the tires for now. And in regards to the leveling kit, how much do you think that would cost for someone to put on?

 

while I'm certainly no tire and wheel pro, I've studied the heck out of them (specifically relating to F150's) for about 10 weeks now.

It's not so much the 17" part of it, that limits your tire size, but rather, the wheel width, which is probably 7 1/2" (but you should confirm that first). Heck, I've seen 35" tires on 15" wheels !
BFG recommends a max tire size for 7 1/2" wide rims, for 285/70-17"s. These are like 32.8"... but they round that to 33"s. If you had wheels which were 8" or 8 1/2" width, you could go with 35"s easily..... However, I've seen where they say that if your going to go with aftermarket wheels, 18"s are a safer bet, because of the potential for aftermarket 17"s to hit with parts behind them.

Hope this helps.

Fish

 

As a general rule, with the new 4x4's and a leveling kit you can fit a 35x12.50 using the oem wheels or 33's using aftermarket wheels. If you don't want to add a leveling kit, stick with a 33 inch tire like a 285/70-17 (33x11.50) or a 305/65-18 (33x12.50).

 

So with 305/65-18's on stock rims on a non-lifted/leveled 4x4 there's no rubbing? Or just a chance of a little rubbing? If it rubs, would it be on the control arm or against the wheel liner or possibly the factory fender flairs?

Anytime I've searched trying to answer these questions, I come up with the same thing. Most with 305's have already added or planned to add a 2" AS leveling kit.

Thanks

 

The Auto Spring leveling kits are extremely easy to install. If you want 35's I definitley would not hold back because of that.

 

SVT2005, you have it right. That size may rub some or it may not on a completly stock 4x4 in the places you listed.

 

So with a leveling kit, i could throw on 35's huh. And i could just keep the 17" rims i have on now?

Considering a leveling kit isnt to expensive, i am thinking about doing this now. But besides the leveling kit and new tires, what else what i need to do? I'm honestly hoping nothing.

 

I think I paid $80 for the leveling kit and another $20 or $30 on a wrench and 30mm socket.

 

when mine was stock i ran a 285/70/17 bfg at, with no rubbing

 

Keep this in mind, 3.73 gear's are better for tall tires than the 3.55's. You will also want to get a programmer to adjust your speedometer and to adjust your transmission shift point's. You may get a little rubbing on the upper control arms with the stock wheels when making hard crank's even with the truck being leveled. Gas mileage mainly in town will drop about 2 mpg and towing anything over 3k pound's will be a pain. All this negative stuff is what you will go through to achive the better look's of a 35" tire opposed to a 33" one. You may be better off sticking with a 285x70x17, these will look a lot better than stock but more practical than the 35's. This is just my opinion from running and owning both size's of these tires.

 

Well assuming i just end up going with the 285/70/17 size tire, i wont have to do any of that stuff you mentioned (adjusting speedometer and transmission shift points)?

And will those size tires rub if i opt out of getting a leveling kit?

 

Yes, they will fit fine. Also, you don't have to adjust the computer with any tire size change but it is always a good idea.

 

Well unfortunately i have no knowledge what-so-ever in regards to messing with the computer. I'd have to find a mechanic to do it for me.

But i'm glad to know those tires will fit. And then i can always add the leveling kit later on if i decided too. But i think thats what i'll go with is the 285/70/17. Now its time to just search for good ones with a good price.