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I am a idiot..need help...with wheels??

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Old 10-08-2007, 02:05 AM
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Cartervs
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Default I am a idiot..need help...with wheels??
Having just bought 1986 wanting to up grade wheels.. Found a set of ROH 7.5" 225/45/17" front with 5 3/8" offset..Rears are 8.5"/255/40/17" with 5 1/2" offset...Will these fit under fenders on stock car?? Or do I have to put air shocks to jack it up?? LOL..just kidding..Thanks in advance for your info and hard earned experience.. Carter
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Old 10-08-2007, 02:48 AM
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V2Rocket
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Generally offset is measured in millimeters. Your car, being an '86 should have 52mm offset.
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Old 10-08-2007, 02:51 AM
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Tenacious_G
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search the boards, there's several threads that go into detail about situations similar to yours.

Best of luck,
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Old 10-08-2007, 12:43 PM
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Tom R.
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Originally Posted by V2Rocket_aka944
Generally offset is measured in millimeters. Your car, being an '86 should have 52mm offset.
Wrongo batman. An 86 is early offset. Early offset is something like 20, late offset is 52. 85.5 model changed the interior, 87 model changed the wheels. there are low offset phone dials from 86 and high offset phone dials from 87 on.
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Old 10-08-2007, 01:56 PM
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Scott at Team Harco
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Originally Posted by Cartervs
Having just bought 1986 wanting to up grade wheels.. Found a set of ROH 7.5" 225/45/17" front with 5 3/8" offset..Rears are 8.5"/255/40/17" with 5 1/2" offset...Will these fit under fenders on stock car?? Or do I have to put air shocks to jack it up?? LOL..just kidding..Thanks in advance for your info and hard earned experience.. Carter
Either those are the wierdest wheels ever made or the numbers quoted are for "backspace". Offset is measured from the centerline of the wheel to the mounting surface. Backspace is from the inner rim edge to the mounting face.

Offset is the standard method of measurement in the wheel industry. It is also cast (or at least stamped) on the wheel somewhere. Usually on the inboard side of one of the spokes.
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Old 10-08-2007, 02:23 PM
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Originally Posted by Tom R.
Wrongo batman. An 86 is early offset. Early offset is something like 20, late offset is 52. 85.5 model changed the interior, 87 model changed the wheels. there are low offset phone dials from 86 and high offset phone dials from 87 on.
Got em backwards :-X

I think the other number is 23mm.
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Old 10-08-2007, 02:47 PM
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Originally Posted by V2Rocket_aka944
Your car, being an '86 should have 52mm offset.
BZZZ. Wrong answer, thanks for playing.


Keep it up and you might get your average from 16.12 to 17 posts per day!

EDIT: Tom beat me to it!
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Old 10-09-2007, 01:54 AM
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Cartervs
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Default Thanks for the heads up on the differance between
Back spacing and offset..I stand corrected. The figures in inches I am transfering to mm's ..And am still lost..Thanks again, Carter
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Old 10-09-2007, 02:00 AM
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Originally Posted by tifosiman
BZZZ. Wrong answer, thanks for playing.


Keep it up and you might get your average from 16.12 to 17 posts per day!

EDIT: Tom beat me to it!
Oh come on, like you haven't gotten some things mixed up before.

Might be why the wife doesn't trust you when you're behind her anymore...
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Old 10-09-2007, 09:11 AM
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Originally Posted by V2Rocket_aka944
Oh come on, like you haven't gotten some things mixed up before.

Might be why my mom doesn't trust you when you're behind her anymore...

I fixed that for you.
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Old 10-09-2007, 10:31 AM
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RMills944
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IF your offset is measured in inches, chances are the bolt pattern is wrong. American cars measure offset in inches. I know my brother's off-road truck has a 4.5in. offset, but that was a custom wheel too. You may want to just pick another wheel...
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