Ok, I have been asking around and I have hear many of answers. What I am looking for are to replace my Goodyear 275/65 18 tires with BF Goodrich All-Terrain TA KO 285/65 18. The specs show that the width of the tires should go on a 8" rim and I have been told that the Lariat stock rims are 7.5". Also here is a link to a truck who has the tires.

https://www.f150online.com/galleries...y.cfm?gnum=3260

So I guess what I am asking is can someone give me and answer to my question of whether or not these tires will fit the stock Lariat rims.

Thanks

 

https://www.f150online.com/galleries....cfm?gnum=3260

 

the tires will probably "fit" on the wheel, but mounting a tire on a rim that is too narrow is not a good idea. i know you want new tires, so it can be tempting to force something, but you could be asking for trouble. the manufacturer would likely not honor any warranty on the tire because it was mounted on the wrong size rim. half and inch is not a huge deal, but on a $35k+ truck you should do it right. get new rims or pick different tires. the inside of the tire is made to seal a certain size wheel and anything different could cause you to pop a bead or something.

 

I have my 285/75/16 BFGs on 7.5 inch rims, lots of us here have the 285s on a stock rim, and I have heard no complaints yet, I certainly haven't had any. IMO, it would be just fine, but make sure that it won't void your warranty, because maybe it would if the wheels were under the recommended size for the tire. It shouldn't pose a problem, though.

 

285's on a 17" wheel here:

http://home.columbus.rr.com/coolpix/tires.jpg

It's 7.5 inches wide as well. Work great! I love these tires...

 

Pickup Man missed one key difference here: the aspect ratios are different (75 vs. 65), as are the mfg fitment recommendations. The mfg says the 285/75/16 tires are fine for a 7.5" to 9.0" rim, whereas the 285/65/18 requires 8.0" to 10.0" rims. The 285/75/17s have the same rim size requirement as the 16s do, which is the 7.5" minimum.

See the BFG fitment chart here.

While you could certainly 'make' the tires fit, it would not be something I would recommend. First, the narrower the rim you run, the more pronounced the crowning effect becomes. Much like an over-inflated tire condition, you will wear the rubber in the middle down first, and prematurely. Second issue; is you leave an insurance company an easy out, should you be involved in an accident where your aftermarket tires are called in to question. Let's say you pop a bead going too fast around a corner and roll your truck. Your insurance company could potentially claim you created an unsafe condition (exceeding the tire mfg recommended fitment) that caused the accident; thereby relieving themselves of any liability. Food for thought... YMMV

 

I wish I had paid closer attention to threads like this one when I ordered my truck. I never bothered to check into what tires were available when I ordered 18" wheels. I like the wheels a lot, it's just that they limit your tire selections. With hindsight, I may have ordered 17" wheels and saved myself some money to put towards bigger tires.

I won't be buying wheels any time soon, so I guess I'll wait and see what pops up to fit an 18x7.5 wheel in the future. I brought it up to my wife the other night (selling my 18's and buying 17's on ebay) and got my head bit off. Live and learn I guess!

 

Buy them from a place like Sam's or Walmart. Them knuckle heads aren't gonna check rim size if there is a warranty claim. They'll adjust them out...

 

I hear what you're saying. But on the bright side, the FX4's 18's weren't a terribly expensive upsell. It comes up being almost a wash if you had gone with 17's and the 3.77LS, as you get it with the 18's anyway. Besides, after a year, your wife won't care.

 

People have done it already with the 18" wheels (dunno if it was FX4 or Lariat rims). A half inch wider that "recommended" will be fine.

 

I thought the same as trublu. I tried to change my order to 17s from the 18s because of the lack of tire selection, bur already had a VIN. I am sure now that 100s of 1000s of F150s will be sold with 7.5" wide rims, the tire companies will be soon to follow, no doubt about it. Its called patience and I'm right on top of the list of people waiting.

 

Just because "people have done it", does not make it a particularly smart or safe idea. You can also get away without using safety glasses in the shop, but do you really need Norm Abrahms to tell you it is better to err on the side of safety? Ask the blind man about his 20/20 hindsight.

In case some missed the point I made in my previous post, you are also exposing yourself to a financial risk, should an accident be determined to have been caused by your choice to purposely ignore the tire mfg fitment guidelines. Do you seriously believe the insurance companies don't look for an 'out' whenever possbile? FWIW, the shop that decided to knowingly ignore those guidelines (when mounting the tires) may also be culpable as well. Poo-poo the safety concerns all you want, but I think you are a fool to do so.

Also worth noting IMO; you will negate some of the ride and handling properties of a tire, when you chose to mount it on too narrow a wheel. Again, like an over-inflated tire, your contact patch is altered in such a way as to cause the tread pattern to not work in quite the same manner as the engineers intended it to. Do you need to do a few doughnuts through a rainy intersection, to decide the engineers might have some valid reasons for making their fitment recommendations?

 

Yea, that's exactly why I ordered the 17inch wheels....

 

I have the 285/65/18 TAKO's on my FX4 and have noticed no unusual tire wear or anything like that. I have run tires on rims that are narrower by .5" or so than recommended for years without ever having a problem, and I usually get 45-50K out of a set of BFG all terrains. No one at discount tire has ever said anything about it other than the tire will look a little more bubbly. I actually prefer that look. Don't know if I am pushing my luck but have never had any Problems in the past.

 

I called Big Brand to get their opinion on it. The guy I talked to said that other than "looking funny" putting that size tire on a 7.5" rim wouldn't be a problem. He thought that any wear issues could be negated by adjusting the tire pressure. He also said it wouldn't affect the warranty.

As for the insurance concerns, I'm not sure if the insurance companies would do that detailed of an investigation. They would probably go off a police report, which almost certainly wouldn't speculate about your tire and wheel size. Half the Ford fanatics on this board can't find out what size the wheels are, much less some random insurance claims specialist. Still though, food for thought.