12.50 wide on stock dually wheels - Ford Powerstroke Diesel Forum
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Old 01-23-2012, 07:16 PM
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12.50 wide on stock dually wheels

Can this be done?? i see the 255/85/16 is about the size I want but all thats out there is the km2. Dont really need that kind of tire. dually wheel is only 6 in wide. I know I would need spacers.
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Old 01-24-2012, 05:45 PM
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Yes a 12.50 wide tire will fit on a stock dually wheel with a 2in spacer in the rear but a 255/85R16 is not a 12.50 wide tire thats actually a 10.00 wide tire and 33 inches tall. The widest tire that I have seen in a 33 is a 295/75R16 and that tire 11.50 wide Thats not to say there is no 33/12.50 but I've never seen one. 295/75R16 is the size I'm currently running and you will still need a spacer if you go that wide.
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Old 01-25-2012, 03:34 PM
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My question really refers to the rim being 6" wide. Will they really bulge in the middle??? I dont mind running spacers. like the the 315/75/16 is a 34"-12.50 but says it should be mounted on a 7.5 rim..???
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Old 07-13-2013, 04:49 AM
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Quote:
Originally Posted by 7.3l-2-6.4l View Post
Yes a 12.50 wide tire will fit on a stock dually wheel with a 2in spacer in the rear but a 255/85R16 is not a 12.50 wide tire thats actually a 10.00 wide tire and 33 inches tall. The widest tire that I have seen in a 33 is a 295/75R16 and that tire 11.50 wide Thats not to say there is no 33/12.50 but I've never seen one. 295/75R16 is the size I'm currently running and you will still need a spacer if you go that wide.
What size spacers are you running with your 295's
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Old 07-13-2013, 05:00 AM
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No they don't bulge badly because of weight on the truck. Mine are 305/70s abd I have a 2 inch spacer, plenty of room. Get fred goeztke spacers. They don't break and best on the market.

Sent from AutoGuide.com App
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Old 07-18-2013, 01:14 PM
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i run a 37 12.5 on my 6.5 wide wheels and i noticed a big handling improvement when i swapped to a 9" front wheel. i dont mind the rear bulging but the front was another story. either way it can be done but i like my 9" front wheel with a 12.5 wide tire
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Old 07-18-2013, 05:15 PM
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I ran 315/75/16 s(35/12.5) on my stock dually wheels with no issues . I even hauled pretty heavy on several occasions (pulled a trailer almost every day) . I ran the goodyear dura tracs . Great tire , I got around 30k miles out of them in the end (switched them from one truck to another ) .
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Last edited by Bad Night; 07-18-2013 at 05:30 PM.
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Old 07-18-2013, 05:45 PM
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Nice upgrade bad night!
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Old 07-18-2013, 09:00 PM
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305s like Nick has are 33-1250 I believe

My 315s are 34.5x12.4 basically a 35
My rears on 6in wide wheels do not touch the outer 1.5 of the tread. As mentioned, they do not buldge in the middle too bad.

Another option for spacers are the arrowcraft. I'm pushing near 500hp range and have not had any issues. Although I only have 1500-2000 miles on them.
I am not sure if Freds are the same way but one thing I do not like about the arrowcraft is, you have to pull the axleshafts to mount them.
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Old 07-19-2013, 10:23 AM
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Originally Posted by 94slowbra View Post
Nice upgrade bad night!
Thanks . I still miss the 99 though . I actually bought another e99 . It's a ext. cab dually 4x4 . It is actually the exact same green as the old truck . It is at the body shop as we speak getting a complete paint job . I haven't decided for sure but I think it will be black . Here is what it looks like now .
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