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Bolt pattern of F250

Old 11-30-2008, 09:12 AM
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Default Bolt pattern of F250

Has there been a bolt pattern change of the f250? Specifically from 99 to 2005? Any tire guys out there.
Old 11-30-2008, 09:21 AM
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Default Re: Bolt pattern of F250

Bug,
I believe there has been a change in the pattern. I'm pretty sure 2005 is when it occurred with the new front axle. Not 100% though.
Old 11-30-2008, 10:35 AM
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Default Re: Bolt pattern of F250

I think the change is in the offset, not the bolt pattern itself. You'll notice that the late wheels appear to be shallower from the outside than the earlier versions, which is a result of more positive backspacing. I understand that late wheels will hit the leaf springs if installed with no spacers on an earlier truck and that the early wheels won't clear the larger brakes on a 2005 or later truck.

The difference in the backspacing is about 1 3/8 inches, so late wheels should fit an early truck if you are comfortable with running wheel spacers.
Old 11-30-2008, 10:50 AM
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Default RE: Bolt pattern of F250

there is a change in the bolt pattern not sure when,but it went from a standard to a metric.i have a set of wheels that will only fit an older truck and not the newer one's
Old 11-30-2008, 01:37 PM
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Default RE: Bolt pattern of F250

I don't know when that change was made. According to the charts at Tire Rack, both a 1999 and a 2005 have an 8 on 170mm bolt pattern. Strangely, 170 mm does not covert to a standard inch number. They often do. For example, on some vehicles, GM uses 5 on 120mm which is also 5 on 5 inches. But 170 mm is 6.692 inches. I've got a set of 2003 and a set of 2007 wheels sitting on a shelf at my shop. I'll measure the hole pattern in the morning, to be sure.
Old 11-30-2008, 01:46 PM
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Default RE: Bolt pattern of F250

Bugbuster - 11/30/2008 8:12 AM

Has there been a bolt pattern change of the f250? Specifically from 99 to 2005? Any tire guys out there.
The F250 used an 8 lug 6.50 inch pattern beginning in 1953. They went to the metric spacing in 1997. So, "Yes", is the answer to yer question.

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Old 11-30-2008, 01:48 PM
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Default RE: Bolt pattern of F250

it may be way earlier like late 80's or early 90's
Old 11-30-2008, 01:49 PM
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Default RE: Bolt pattern of F250

tommyr904 - 11/30/2008 12:48 PM

it may be way earlier like late 80's or early 90's
Negative, sir. Do not make me slap you around like you were some sort of plumber.


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Old 11-30-2008, 02:38 PM
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Default RE: Bolt pattern of F250

Snapper Head - 11/30/2008 4:49 PM

tommyr904 - 11/30/2008 12:48 PM

it may be way earlier like late 80's or early 90's
Negative, sir. Do not make me slap you around like you were some sort of plumber.


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Old 11-30-2008, 03:04 PM
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Default RE: Bolt pattern of F250

Good!

Now I don't hafta member to mensure dem.

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Old 11-30-2008, 07:18 PM
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Default Re: Bolt pattern of F250

99 is when they changed to the 8x170mm. Half tons changed in 97 from 5x5.5 to 5x135mm. They also threw some 7 lugs on some light duty 250s.
Old 11-30-2008, 07:37 PM
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Default RE: Bolt pattern of F250

tommyr904 - 11/30/2008 1:38 PM

Snapper Head - 11/30/2008 4:49 PM

tommyr904 - 11/30/2008 12:48 PM

it may be way earlier like late 80's or early 90's
Negative, sir. Do not make me slap you around like you were some sort of plumber.


Big Al



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I love you too, man.


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Old 12-01-2008, 05:12 AM
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Default Re: Bolt pattern of F250

Thanks for the replys.
Old 12-01-2008, 08:29 AM
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Default Re: Bolt pattern of F250

Here's the info I believe you're looking for... http://www.powerstroke.org/forum/gen...tml#post542157

Powerstroke.org is a great resource. There are some really smart guys on there.



WHEEL BOLT PATTERNS, BACK SPACING, & CASTER/CAMBER



All Superdutys 99-08 that are singe rear wheel models use the 8x170mm bolt pattern.
Old body style(OBS) is 8x6.5

The 05-08's have larger brakes so the backspacing is different than the 99-04's.


In 05 ...engineers to upsized brake rotors by 5 percent, to 347 mm in front and 340 mm in rear.

Other improvements include larger calipers for both the F-250 and F-350. The front calipers have twin 60 mm pistons - up 11 percent from 2004 - for better braking feel. Rear calipers have twin 48 mm calipers on F-250 and twin 54 mm pistons on F-350 dual-rear-wheel models.





BACK SPACING

99-04......4"
05-07.......18"and 20"(from the factory) have 5.80" BS, and the 17" have 5.50"



00-04s came with 16s (unless it was a Harley Edition, they had 18s)...they don't clear the calipers on the 05-08s.
A 04 HD wheel would fit on a 05-08 since they were 18s, but they had less backspacing so they sit further out of the wheel wells on 05-08s.

05-08s fit on the 99-04, just rub on the leaf springs and sit further under the truck than they do on the 05-08.



Offset is the location of the wheel mounting surface in relation to the true center of the wheel......normally in mm.
Negative does move it inward.

So....

A 20x10 wheel with a 4.5" BackSpace will have approx -24 or -25mm offset.
A 20x12 wheel with a 4.5" BackSpace will have approx -51mm offset.


FYI, 25.4mm=1"

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