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» Northern California Ford Owners     » Automotive   » Tech Talk   » Offset & backspace Q???

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Author Topic: Offset & backspace Q???
STREETFIGHTER50
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What wheel offset is equivilant to a 6" BS?

[ June 27, 2005, 05:54 PM: Message edited by: Rhombeus50 ]

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'89 Coupe-Kurgan Tuned 498/491RW, Vortech SI, 351W

Posts: 3925 | From: SF Bay Coastin' to Rocklin | Registered: Jun 2003  |  :
venomous99
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it depends on the width of the wheel to determine offset.

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[ June 28, 2005, 10:46 AM: Message edited by: venomous99 ]

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MKII Q7
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Posts: 4811 | From: dc | Registered: Oct 2002  |  :
STREETFIGHTER50
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I wanna try those '05 Bullitts or '05 GT Premium wheels on my coupe with the SVO conversion. The '05 Bullitts are 17x8 w/a 45mm offset.

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'89 Coupe-Kurgan Tuned 498/491RW, Vortech SI, 351W

Posts: 3925 | From: SF Bay Coastin' to Rocklin | Registered: Jun 2003  |  :
166 Merlo
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So that means that to put 05 bullits on a fox, the inside of the wheel will be 5.79" + 4.5cm (whatever the conversion is) farther from the mounting surface of a previous year bullit wheel.

Hmm so that means it'll tuck more... I got an idea, I wonder if it's a dumb one since I hit that perpelli... I'll save it for later [Whoo Whooooo!]

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'89 - Boss Coupe
'70 - Drop Cutthang
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Posts: 3954 | From: Thebay | Registered: Jul 2002  |  :
Luke87GT
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quote:
Originally posted by Mr JoCo:
So that means that to put 05 bullits on a fox, the inside of the wheel will be 5.79" + 4.5cm (whatever the conversion is) farther from the mounting surface of a previous year bullit wheel.

Hmm so that means it'll tuck more... I got an idea, I wonder if it's a dumb one since I hit that perpelli... I'll save it for later [Whoo Whooooo!]

That's exactly right except you added 4.5cm instead of just adding 1/2 of that. The 94-04 17x8's already have 24mm offset. The 05 rims have a 45mm offset which means 21mm more offset than the old rims. This come sout to roughly 0.84inches more backspacing. Your new BS is 5.72 + 0.84 = 6.56in

This will look all wrong. Your wheels will tuck into the center of the car by close to an 0.84" over the 94-04 wheels. You could use a 3/4" inch spacer if your studs are long enough...

Good luck

[ 07-01-2005, 14:37: Message edited by: Luke87GT ]

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Stangless

Posts: 7802 | From: San Mateo | Registered: Jul 2000  |  :
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That's about what I need for a perfect fit in the back. But now the question is would a set of old bullits in front be destinguishablely different paired up with a set of the 05 bullits in the back?

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'89 - Boss Coupe
'70 - Drop Cutthang
'68 - Cougnut
'87 - 0166, Its real

Posts: 3954 | From: Thebay | Registered: Jul 2002  |  :


 
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