What is factory wheel specs on a 2002 F250? - Ford Powerstroke Diesel Forum
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Old 04-17-2014, 11:58 AM
SJB SJB is offline
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What is factory wheel specs on a 2002 F250?

I was curious what the specs are on the factory 16" wheels of a 2002 F250? I tried doing some searching on here, but wasn't having much luck.

Width?
Offset?
Backspacing?
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Old 04-19-2014, 11:06 AM
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16x7" not sure on the backspacing maybe 5"(maybe)

either way max tire most tire shops will install is 285/75/16 or 295s

there also the metric bolt that only ford runs, 8x170mm vs the old 8x6.5" that chevy and dodge use(and the obs fords)
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Old 04-22-2014, 02:46 PM
SJB SJB is offline
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Thanks for the information. Does anybody know the factory wheel backspacing for sure?
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Old 04-22-2014, 04:14 PM
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I had 315/75/16 on my stock 16x7s.

Somewhere online said +6mm
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Old 04-22-2014, 08:57 PM
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Quote:
Originally Posted by 7.3pwrstrke View Post
I had 315/75/16 on my stock 16x7s.

Somewhere online said +6mm
That would be the offset which would equate to about + 1/4". So if I'm understanding the offset/backspacing correctly: The centerline of a 7" wide wheel would be 3.5". Add 1/4" for the +6 mm offset, and you have a wheel with 3.75" backspacing. Correct me if I'm wrong here....?
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Old 04-23-2014, 04:19 AM
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Sounds about right to me.

Most 12" wide rims are -44mm offset, so 44x0.0393 = 1.75

6 - 1.75 = 4.25 and I'm pretty sure that's the backspacing on most 12" wheels
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Old 04-29-2014, 11:39 AM
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Quote:
Originally Posted by SJB View Post
That would be the offset which would equate to about + 1/4". So if I'm understanding the offset/backspacing correctly: The centerline of a 7" wide wheel would be 3.5". Add 1/4" for the +6 mm offset, and you have a wheel with 3.75" backspacing. Correct me if I'm wrong here....?
Well, I was wrong in my calculations. I did some more research and found that you have to add about 1" width to the advertised wheel width when you measure backspacing. Advertised wheel width measures from the inner lip of the rim where the tire makes contact only. For overall width, you add about 1" for total width (1/2" for each outer lip).

So the stock 7" wheel would actually have a certerline of 4" (8" overall width). Offset is +6mm (~ 1/4"). So backspacing would be 4" for centerline + the 1/4" positive offset. So backspacing would be 4 1/4". Front spacing towards the outside of the truck would be ~ 3 3/4". So if you are looking to buy new, aftermarket wheels you can compare how far they would stick out from the 3 3/4" front spaced stock wheels.

This is a good video explanation of offset and back spacing taking into account (the advertised and actual width of the wheel).
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Last edited by SJB; 04-29-2014 at 02:37 PM.
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