I know this has probably been covered before, but the search function was deactivated because too many of us were on here at once... What's the biggest tire I can put on stock '86 F150 4.9 4x4. I have 235/75/15s on now, but it looks like I could go a lot taller. Not sure of the rim, but I would guess 6" wide. I don't wanna' go huge, but would 31x9.5 work? Also, where could I find plain ol' white 10" x 15" steel rims for it (for bigger MTs someday?) I've had this truck for years, but can't afford to drive it everyday with gas prices the way they are. Just found a local 4x4 trail park and plan to use it strictly for that. Engine, drivetrain, clutch and 4x4 are all too strong to use this truck simply for hauling the trash down the driveway 1 day a week and hauling square bales 3 times a year. Road tires are balding and tax refund's coming... thanks,RC

 

was just wondering this and just got through searching and couldn't find anything...will 33x12.50's fit on this truck without any modifications?..thanks

 

I've read that the biggest are 31-10.5-15's, I've seen 32-11.5-15's but they tend to rub on the radius arms at full turns, If you don't plan on going lock to lock often then the 32's should be great, just remamber your gearing when changing tire sizes.

 

eh i have a stock 80-f100 2wd and i can put 31's under it but i took them off they looked to bulky for the truck. and they rubbed cause i had the tendancy to have the needle burried at 85 and going down the roughest road around lol, but yeah 31's should fit good :P i have a set of 31x7 BFgoodrich with 95% tred left if anyone is interested :P

 

the biggest i would go is 31x10.50. i have those on my stock 1976 Dodge W100, and they work fine. if you plan to go any bigger, then do a cheap 3 inch body lift, and you could go with 33x12.50's.

 

My friend has an 86 F-150 4x4 with 32's on an 8" wide rim, and they just barely rub, 31's would fit perfect. If it was a 2wd truck I would put 31's on the front, and you can easliy fit 33's on the back.

 

you should be able to fit a set of 33-10.-15s on your truck without a lift kit

 

33's will fit...without rubbing, but not in 12.5 width. Maximum width is 10.5 Inches.
If you do any kind of even mild offroading, 33's are not a good idea without a lift, not much clearance when your suspensions starts doing its thing.

 

I used to run 31x10.50s on my truck. I am sure 32x11.50s would fit fine. I raised the front 2" to level out the truck. I now run 33x10.50s. I am sure I could have went to 12.50s, but I don't have to worrry about the 10.50s rubbing or sticking out past the fenders.

 

i have an 86 f-150 with a 4.9 also. I run 31X10.5 perfectly, with a rim that pushes your tires out a little bit farther (only like an inch) you can put 32 X 11.5 on it.

 

at one point, i had a website in my favorites that gave how much lift you needed for proper clearance with what size of tire you wanted to run....33's, it seemed, required 3" of lift on an 80-96 (i think, don't quote me on it) F-150 4x4....

31's will fit fine if your springs are still in good shape, otherwise, you may rub on your fenders a little bit...

MontanaFord

 

31x10.50s will fit right on there. It's a good all around size for everyday use and moderate offroading. I have been running 31s on my 84 F150 4x4 300 six 4spd for years. It's not too much tire for the stock gearing and six cylinder either, and I have 3.08s (soon to be 4.10s with 33s)! As long as you have the 4 speed granny box, you should have no problem with power. I am sure an automatic would be okay but I know, they work great with a 4 speed. Also you can run 10.50s on stock rims no problem.

 

Hi there! I just wanted to throw my two cents in. I have an 86 F150 4.9L 4x4. I am currently running a set of 33x12.5-15 Courser radial OTD's. I picked these up, only because, having recently purchased this old beauty...it had two different tire sizes on it (UUUGGHHH). I got them cheap from my sister's fiance for $125. (5 tires 4 black wagon wheels) I threw em on and loved the appearance. I do find a lil rub on tight turns, which could cause you some headache at times.

There are a few key factors you should prolly consider first.(nobody ever really wants to hear this side...haha) First and foremost, think about what you want to do with the truck. My truck runs a 8.8 rear, geared at 3.08. This is IMHO way too high of a gearing for these tires. Hell, let's face it ...that's highway gearing. Lots of extra throttle to get em rollin! Here is another thing, at 12.5 wide they are terrible in the snow! Offroad...they pack snow up in front of em. And on the street plowed slush they turn my truck into a giant sled. Forget bout hitting them brakes too fast or too hard. And fuel economy? With gears like that I don't have to say anymore!

Well, good luck......oh and here's another opinion.....stay away from those cheap block lifts!!! Kinda like throwin good money after bad. I plan on lifting mine soon too and I am gonna have to do a suspension lift.....I have an 18 mo son Brant Alban, first kid, and I ain't gotta tell you , he's my pride and joy. I guess I look at it as a matter of safety....and those lifts aren't always that!!

 

BTW everyone has those black or white wagon wheels at roughly $35 -$40 apiece.

 

hey guys.

i've got a 1980 f-100 2wd with stock rims on it.

i'd like to get those white wagon wheels, but can't find any locally that go over 15" in diameter. I want 16's b/c a friend has some nice tires cheap that are 16".

any ideas where i can get some 16's or should i just buy the 15" and buy new tires that will fit them???

thanks much.