Bolt Pattern 2005 F350 4x4 SRW - Ford Powerstroke Diesel Forum
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post #1 of 17 Old 12-05-2008, 08:09 PM Thread Starter
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Bolt Pattern 2005 F350 4x4 SRW

Just want to confirm that the bolt pattern for a 2005 F350 4x4 SWR is 8x170mm.

Thanks,

John
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post #2 of 17 Old 12-05-2008, 08:10 PM
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Correct....99+ SRW SDs are 8x170mm
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post #3 of 17 Old 12-05-2008, 08:16 PM Thread Starter
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Thanks, I found a great deal on a set of new wheels and I want to jump on it, what is the smallest diameter wheel that will fit?
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post #4 of 17 Old 12-05-2008, 08:20 PM
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18's and up will fit for sure....some 17's do but not all.
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post #5 of 17 Old 12-05-2008, 08:22 PM Thread Starter
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Thanks for the info! Florida fireman here.
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post #6 of 17 Old 12-05-2008, 08:40 PM Thread Starter
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Just ordered the new wheels, 4wheel parts wholesale had them for 75% off, got the set for $372.00. Weld Racing 18x10.
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post #7 of 17 Old 12-05-2008, 08:47 PM
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suprised they had anything left
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post #8 of 17 Old 12-05-2008, 08:49 PM Thread Starter
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Me too, they have lots of wheels on clearance for 75% off.
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post #9 of 17 Old 12-05-2008, 08:51 PM
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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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post #10 of 17 Old 12-05-2008, 09:24 PM
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shouldnt you be working on Matts truck? lol
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