ok dumb question here but i need an answer.....i have the factory wheels on my 94 f150, with 33x12.5/15 BFG's on them, i believe the factory wheels are 15x7.5 i think, im looking at a set of 15x10 wheels, will these wheels make you tires any wider?.....if so how much wider cause im trying to fit these on my truck its a 94 F150 4x2 with a 3" body lift, and like i said 33x12.50 BFG's thanks for your help

 

They will push the bead out some and make a wider contact patch with the ground. A 10 inch wide wheel on a 12.5 inch wide tire will lose the bead easier than an 8 inch wide wheel.
You need to check the backspacing of the new wheel. You can control rubbing of the chassis with backspacing of the wheel. Just remember, too little backspacing is not good for the hubs.

 

thats pretty amazing to get 12.5 wide tires on a 7.5 rim. how many miles are on the tires and have they worn funny? If the lug pattern is right for your truck the rims will fit but the offset is more important than just the width. If you had 12.50s on your stock rims I would say your tires rub the radius arm whenever you turn correct? Anything over 9.5 wide on stock rims will rub, in my experience. When you talk about the width of the tire vs the width of the rim it doesnt actually make the 'tire' wider but what you are changing is the sidewall distortion. If you mount a wide tire on a skinny rim you are pulling the sidewall in and you are rolling the edges of your tread in causing it to wear funny. depending on inflation it probably will wear more in the center. Id say you could do 12.50s on 9" wide rims no problem, 10" wide are no problem.

 

yea ive done all my measurements for the offset, i have 2" spacers on there now to offset it, and yea it does tuck the walls in, no actually the tires havent worn funny at all they are wearing well, but they are also pretty new, just got them in may so not even 2,000 on them, so you know the small rims pull the tire in, with probably make the tread not the 12.50 its supposed to be right?....so throwing 10 in. wide rims on them wont make the tread more level and a little wider more like the 12.50 they are supposed to be?....just a thought but i really appreciate the response, yea i dont know how we got them to work either but they do, but next week im gettin new wheels and i wanna make sure i dont hit my fenders cause im kinda close now as it is, the offset on my new wheels in inches is 1.8 in. and like i said i have the 2" spacer on the factory wheels right now to offset them, but of course im gonna take them crappy things off

 

im not too worried about hitting the chassis, its the fenders that i come close to, right by the doors that little corner, so yall think these will work out for me then?

 

they will fit fine but watch your tire pressures as it'll prolly start to wear funny

-cutts-

 

why will they wear funny?.....they should be wearing funny right now since they are on a 7.5 wheel, wont they wear like they should on a 10 inch wheel?

 

i think he was saying watch your psi with them on the stock rims. Tire psi is always important but it becomes very notacable when you run wide tires. Over inflation will cause the center to wear out well before the outsides and under inflation will cause the sides to wear out leaving more tread in the center. Im going to have to dissagree with JeremyH on loosing the bead easier on the 10" vs the 7.5". The effective tread on the 12.5 wide tires still gives you 2.5" wider then the rim which should leave the bead at the correct angle. This is vs. 5" difference on the stock rim. I would think you could run a lower pressure on the 10" rim vs the 7.5" rim before you have problems. The smaller difference in width will leave your sidewall at a better angle and should be stronger vs the skinny rim already rolling your tread over would give your tire more of an advantage in a corner to roll off the bead. Either way if you are dropping pressure on your rim to offroad a great deal you should invest in beadlocks.

"why will they wear funny?.....they should be wearing funny right now since they are on a 7.5 wheel, wont they wear like they should on a 10 inch wheel?"

They will wear fine on the 10" rims just make sure to not overinflate or underinflate and you will be fine.

 

so yall are saying in short that going from a 7.5 in wide wheel to a 10 in. wide wheel wont make my 33x12.5 tires any wider tho?

 

It will make them both wider and a little shorter as those tires will squat more on the wider rims - how much I couldn't tell you but it will make a difference. We're talking section width here - the width at the tire's widest point, which is sidewall to sidewall not across the tread, and what you have to worry about for rub. Tread width is basically fixed and won't be affected.