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31x10.5 should not be too big for your combo. I wouldn't consider regearing until you get into the 33 inch area or bigger. Plus, you can always at a SLIGHTLY higher stall speed converter to get the motor spinning higher at lower speeds, and maintain stock gearing. While this won't work for ever, or for every possible combination, it is a way to move the truck from a stop easier with taller tires/gears.
Most of the people I have known that owned Broncos, myself included, threw on 31s or 33s and were good to go without much thought. If you do not want to get left behind off-road, I would just throw on the most aggressive 33s you can afford and call it done and good.
sounds like I should be good to go, that is when I can come up w/the money, also i finally discovered what the tranny was, an np435, so its has something like a 6.88 first gear, I beleave that this should be enough to start even 35's just fine, but im not going that far (yet) and this is also my first 4x4. also, how else would this affect the bronco other than the added ground clearance? i have heard that the ride improves, but what about handling?is there anything else that i might possibly need to worry about?
there are two things you might want to consider
first if this is your first 4x4 and you first experience with wider tires, get a steering stabilizer or at the very least be ready for the pull not so much on the trail(you are expecting it) but the first time you hit a good long puddle on the side of the road it is an eye opener!!!!!!!!
second if you are thinking of going even bigger with the tires I am very happy with the power steering swap to a saginaw pump there is plenty of info here it was a relativly easy swap and cheap.
good luck
and remember if you run into any problems or questions your not the first! jump back on here and ask
i dont think that the response will be too terible of a suprise, i had stuck wider tires on my dads 76, but thanks for the heads-up(it probably would have caught me by suprise!). and actually as of right now im doing an engine swap (old engine spit a rod, busted the cam and some how made the cylinder wall and the side of a piston dissapear, oh and it fried a lifter to the top of the block) the engine is out of a van that wouldn't stop spitting out 4 speed overdrives, so I have everything there to do the swap. so at least im one step ahead!
If you have a NP435 and a NP208f with the 2:68/2:71 ratio I do not see 33s or 35s being a problem off-road. 33s will rub a bit (radius arm) on a tight turn, but, it is predictable and avoidable. I think 33s are the perfect size for a stock Bronco. Only bad thing is with steel rims trying to get the tire on the back carrier since it can be a bit heavy for some people.
actually, mine has a carrier on the inside, first of its kind that i've seen, at least on a bronco, but would a larger tire fit on it?, and are these factory? it seem like it would be a pain in the butt.
Last edited by muscletruck7379; Nov 13, 2003 at 05:45 PM.
The biggest tires you can fit on a bone stock bronco 1987-91 is a 32"x10.5. For more info.on fitment of tires refer to the(fitment guide)http://www.mickeythomsontires.com/truckhtml
Originally posted by adamk1974 The biggest tires you can fit on a bone stock bronco 1987-91 is a 32"x10.5. For more info.on fitment of tires refer to the(fitment guide)http://www.mickeythomsontires.com/truckhtml
Actually, 32x11.50 15 will work. 32x11.50 is more readily available than 32x10.5.
In fact, I have 32x11.50 tires on 15x10 rims and my rig has a stock supsension with exception of cepek shocks in the stock Quadrashock set up. My rig did come from the factory with 32x10.50 tires, so maybe thats why I have had no problems.
Originally posted by rebocardo Only bad thing is with steel rims trying to get the tire on the back carrier since it can be a bit heavy for some people.
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Yeah, tell me about it. I have forged steel rims, and 35" Muds. That combo weighs about 125 pounds. I;m lucky though I don't have the out-side carrier.
The biggest pain is when you try to change a tire, you have to hold that 125 pound tire up and line up the lug nuts.
I guess I should have just said a 32 and left it at that oops! I'm sure your right rlh. Talk at you soon. Also for some reason you must look up Mickey Thomson Tires through Google to get there sorry about the bum gaitway.
Last edited by adamk1974; Nov 15, 2003 at 09:55 AM.
Yeah, tell me about it. I have forged steel rims, and 35" Muds. That combo weighs about 125 pounds. I;m lucky though I don't have the out-side carrier.
The biggest pain is when you try to change a tire, you have to hold that 125 pound tire up and line up the lug nuts.
stick your 4-way or tire iron onder it and use it as a lever, thats what I was taught to do
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