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Old 02-19-2013, 09:51 PM   #1
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10.5 vs 12.5

I am running 33x10.5 on my stock 15" Columbia edition rims with the 3.25 RC lift. I just received my new 15" ion rims that are 15x8 with 3.5 back spacing. My delema is do I bite the bullet and order a new set of 33x12.5 (thinking dura tracks) or keep the brand new BFG all terrains that i just bought and mount them on the new rims. Looking to see some pics of similar set ups and comments on what you think would look better.

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Old 02-19-2013, 10:04 PM   #2
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Mount the 10.5 tires you already have on your new rims. You will be amazed at how much better and wider they will look on the new wheels with the better backspacing. If you bought the BFG's new, you will not get what you have into them by selling them used, even if only a little used. When they wear out, then get you 12.5's if you want them.

That is what I would do.

Edit: added a pic for you. I know it is a Cherokee, but my buddy has 31x10.5x15 tires on it. Look at the difference the aftermarket wheels made with the same tire going from stock wheels to an aftermarket 15x8 wheel!





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Old 02-19-2013, 10:20 PM   #3
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I run 33x12.50's. Since you have the bs to run the 12.50's I'd say go for it. But that's just me. Here's a few of my Jeep. Its on a 2.5" OME lift. Waiting to put a 1.25"bl on next time I'm home from school.
P.S. Sorry they are a little dark. I took them on my phone and I haven't been home yet to take better ones
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Old 02-19-2013, 10:21 PM   #4
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But if your 110.50's still have tread runs those till you need new ones. It won't look bad. And it gives you more time to decide.
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Old 02-19-2013, 10:25 PM   #5
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I say run a set of 225/75/15 on those rims. You'll have tons of flex room with no rubbing.
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Old 02-19-2013, 10:27 PM   #6
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tires are too expensive nowadays to not get all the miles you can out of them. In the meantime, save up the extra little bit and get the MTR Kevlars over the Duratracs if you offroad a lot.
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Old 02-19-2013, 10:49 PM   #7
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Quote:
Originally Posted by BLK00TJ View Post
tires are too expensive nowadays to not get all the miles you can out of them. In the meantime, save up the extra little bit and get the MTR Kevlars over the Duratracs if you offroad a lot.
I'd say the same thing. But I have the mtr's on my jeep so i'm a little partial
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Old 02-20-2013, 07:26 AM   #8
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Do you plan to wheel the rig aired-down?
With only a 2.5" difference between the 10.5" tire width and 8" wheel width, you risk losing a bead when offroad... or as happened to me many times when I ran a 2.5" difference (12.50 on a 10" wheel) packing dirt/silt/gravel/sticks/bark into the bead seat, preventing airing up the tire until the bead seat was cleaned.

If you plan to be mostly street use, or don't plan on airing down below ~20 psi, then the 10.5 on 8" wheel will be OK.

Today I run 33x10.50 MTs on a 7" wheel (3.5" difference). Works great, no bead problems at 12 psi offroad. For offroading and airing down, 7" wheel is about ideal for a 10.5" wide tire. An 8" wheel is great for a 12.5" wide tire.
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Old 02-20-2013, 09:12 AM   #9
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I ran 33X10.50's on 9" wide (measured) wheels for years with no issues, but I never ran them below about 12PSI. The bead retaining feature on every wheel isn't the same, though.

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Old 02-20-2013, 09:20 AM   #10
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Correct me if I'm wrong, but a 12.5" tire on 3.5" of backspacing is going to be sticking out beyond your flares pretty good. Make sure you can pass inspection in your state with that setup. In Mass, they can be finicky about it. There's no definitive law (some say you need your tires inside the flare, some say you don't, but it isn't black and white). I run 11.5" tires on 3.75" BS and I stick out a solid inch and a half. When I do upgrade my wheels/rims, I'm probably going to go to a 285/75/16 (basically 33x11) on 4" BS in order to tuck them under a hair more coupled with Rubi flares in order to save myself any potential headaches. I also like the look of a skinnier tire, thats all opinion.

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