33x12.50 vs. 33x10.50 ? - Ford Bronco Forum
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post #1 of 23 (permalink) Old 12-14-2016, 09:07 AM Thread Starter
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33x12.50 vs. 33x10.50 ?

Baby needs new shoes! Looking at the DC Extreme Country. Trying to decide on size. Bronco is a 1994 w/3.55 gear, Factory 15x7.5 Alloy wheel. No lift, but I do have a new set of Moog 824 front coil springs I'm going to install first.

Should I get 33x12.50 or 33x10.50?

Truck real does go off road, just want a more aggressive look!

Also, Anybody have a 33" spare tire mounted on the factory swing away tire carrier?

1994 Bronco XLT, 5.8L, 33x12.50 Mickey Thompson MTZ's, 15x8" Raceline Rockcrusher wheels, Moog824 coil springs, Redhead steering box, (6) KYB shocks,
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post #2 of 23 (permalink) Old 12-14-2016, 09:17 AM
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10.50 on 7.5
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post #3 of 23 (permalink) Old 12-14-2016, 02:49 PM
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If you really want your tires to look more aggressive (I assume that to mean wider and with some side-tread) then you should swap out your wheels too.
15x10 wheels with 33x12.5x15 tires will get you a more aggressive look and the combo will perform better, usually without rubbing the radius arms.
In my experience (maybe I've just been lucky) a 10" wide wheel comes with the right off-set needed. Many people experiencing the rad-rub are sticking wider tires on 8" (or less) wide wheels... like you probably would if you stuck 12.5 wide tires on a 7" wide wheel. The tire is much wider then the wheel was designed for and the lack of offset will often cause the tires to rub at full turn, costing you valuable turning radius and generally annoying the hell out of you, me, anybody who cares.

and yea... I just pulled the summer time 35" BFG KO2 off my external spare carrier and replaced it with a generic brand 33" spare to match my winter time 33" studded GYW Duratracs. Why?


Here's a few pics (if supermotors is going to behave) of my '90 last year, after installing my new 33" Duratracs on some old 10x15 wagon wheels.
She has no lift installed but did have the front leveling coils put on by PO.








(btw: that '90 is up for sale now. the external carrier swap I referred to above is on my '95, obviously not the '90)

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post #4 of 23 (permalink) Old 12-14-2016, 03:34 PM
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BFG 33x10.5/15 or 33x12.5/15?

I'm very happy with 10.5. I also have a 33" 10.5 KM2 on the spare carrier (even with it missing two bolts) and it seems fine, and I drive kinda crazy offroad.


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post #5 of 23 (permalink) Old 12-14-2016, 06:40 PM
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what size wheels are you running those 10.5's on phobos2deimos?
your post in the other thread doesn't say but they are key to the fit and function.
if you're running 8" or 7"?

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post #6 of 23 (permalink) Old 12-14-2016, 10:19 PM
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I'm a 95 with no lift and moog springs. I'm on 15x9 rims though and I run 33x12.5 0's with minimal rub on full lock, i did trim the front bumper a bit. I'm up the road from Suwanee in Buford if you want to come take a look. Just pm me.
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post #7 of 23 (permalink) Old 12-22-2016, 05:56 PM
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I would go with 33x12.5 looks meaner.

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post #8 of 23 (permalink) Old 12-22-2016, 07:57 PM
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31s are the bare minumum that can get away with a 10.5" tire and not look wimpy. 12.5 all the way.

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post #9 of 23 (permalink) Old 12-22-2016, 08:00 PM
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Swamper q78s are 35x11.5 and I think that's the perfect tire ratio.


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post #10 of 23 (permalink) Old 12-22-2016, 09:17 PM
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Quote:
Originally Posted by BikerPepe` View Post

If you really want your tires to look more aggressive (I assume that to mean wider and with some side-tread) then you should swap out your wheels too.
15x10 wheels with 33x12.5x15 tires will get you a more aggressive look and the combo will perform better, usually without rubbing the radius arms.
In my experience (maybe I've just been lucky) a 10" wide wheel comes with the right off-set needed. Many people experiencing the rad-rub are sticking wider tires on 8" (or less) wide wheels... like you probably would if you stuck 12.5 wide tires on a 7" wide wheel. The tire is much wider then the wheel was designed for and the lack of offset will often cause the tires to rub at full turn, costing you valuable turning radius and generally annoying the hell out of you, me, anybody who cares.


I run 33x12.5's on an 8" wheel and I regret not getting a 10". In addition, I read a really cool article on terra-mechanics and why narrower tires can be better:

Expeditions West: Tire Selection for Expedition Travel

My next set will be 33x10.5's.
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post #11 of 23 (permalink) Old 12-23-2016, 07:29 PM Thread Starter
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Thanks for the info. I think I'm going to order (5) new 15x10" alloy wheels and some 33x12.50 tires. With no lift kit(except for my Moog824 spring) (6) new KYB Gas-adjust shocks and 3.55 gears I think I'll be good to go!

1994 Bronco XLT, 5.8L, 33x12.50 Mickey Thompson MTZ's, 15x8" Raceline Rockcrusher wheels, Moog824 coil springs, Redhead steering box, (6) KYB shocks,
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post #12 of 23 (permalink) Old 12-23-2016, 07:37 PM
Harley's & Bronco's FTW!
 
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3.55 gears? don't you have stock, 3.55 gears already? I think 4.10 should be ideal for 33's.
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post #13 of 23 (permalink) Old 12-23-2016, 07:52 PM Thread Starter
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yes, I should have said since I have 3'55 gears and I'm not planning on changing that
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1994 Bronco XLT, 5.8L, 33x12.50 Mickey Thompson MTZ's, 15x8" Raceline Rockcrusher wheels, Moog824 coil springs, Redhead steering box, (6) KYB shocks,
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post #14 of 23 (permalink) Old 12-23-2016, 09:23 PM
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Quote:
Originally Posted by Jimmyz View Post
yes, I should have said since I have 3'55 gears and I'm not planning on changing that
I'd go the thinner tire as well, though it's not going to look beefy. Only way to do that is move to at least an 8" wheel and with 12.5" tire it's best to be a bit wider still. I ran 8" wheels and 12.5" up to 37" size, but that's not ideal. I love the 9" wheel, though these days I run 17's, lower sidewall is so much better.
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post #15 of 23 (permalink) Old 12-23-2016, 10:11 PM
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Also, Anybody have a 33" spare tire mounted on the factory swing away tire carrier?[/QUOTE]

Mine is a '79 with the swing away spare tire carrier with a 33 12.50 15 mounted on a 15x10 or 15x8 depending of what set of tires I use.
No problems after 3 years.
Marc
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post #16 of 23 (permalink) Old 12-27-2016, 10:16 PM Thread Starter
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Well I changed my wheel and tire order after the first set was back ordered. Now I ordered Super Swappers Iroks 305/70R16's on 16x8" Raceline Rock Crusher Polished Wheels. 4wheel parts said I'll have them by Friday!

1994 Bronco XLT, 5.8L, 33x12.50 Mickey Thompson MTZ's, 15x8" Raceline Rockcrusher wheels, Moog824 coil springs, Redhead steering box, (6) KYB shocks,
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post #17 of 23 (permalink) Old 12-28-2016, 12:21 AM
Harley's & Bronco's FTW!
 
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well that's a whole new game plan huh? did you order any specific backspacing?
be sure to post pics and impression. good luck with 'em.

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post #18 of 23 (permalink) Old 03-16-2017, 11:02 AM
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Thank you guys for this thread, this is helping me alot in my search for 33x12.5, 15x10 wheels, also be adding Moog CC824 Springs.

@BikerPepe`

Thanks Dude.
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post #19 of 23 (permalink) Old 03-16-2017, 02:50 PM
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Quote:
Originally Posted by Jimmyz View Post
Thanks for the info. I think I'm going to order (5) new 15x10" alloy wheels and some 33x12.50 tires. With no lift kit(except for my Moog824 spring) (6) new KYB Gas-adjust shocks and 3.55 gears I think I'll be good to go!

@Jimmyz

How did the set up work out for you? I am allocating the exact same parts.

Thanks Bud.

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post #20 of 23 (permalink) Old 03-16-2017, 02:57 PM
Harley's & Bronco's FTW!
 
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Quote:
Originally Posted by Jimmyz View Post
Well I changed my wheel and tire order after the first set was back ordered. Now I ordered Super Swappers Iroks 305/70R16's on 16x8" Raceline Rock Crusher Polished Wheels. 4wheel parts said I'll have them by Friday!
he couldn't tell you. he changed his mind when what he first wanted was back ordered.

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