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Old 10-06-2003, 20:59   #1 (permalink)
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confused Why did Ford change the wheel offset in the AU?

As we all probably know by now (if you don't, you've missed 20,000 threads asking the same question), wheels designed for an AU/BA will not fit earlier model Falcons. All of us probably also know that they can be made to fit using spacers/adaptors, however these are illegal in most (if not, all) states of Australia. And we also probably know that there are copies of wheels from an AU and other models that are made to fit earlier model Falcons.

Anyway, that isn't the point of my thread. What I was wanting to know, is: Why did Ford introduce this different offset to the AU Falcon? Safety? Weight distribution? It's obviously an improvement, correct? But what is the actual reason behind it all?

Just out of curiosity, the wheels from an AU/BA, will they fit a Commodore without the use of adaptors/spacers etc?

Thanks for your help :D


PS: For anyone needing a resource on bolt pattern or things wheel-related, check the following link (although it is American):
http://www.edmunds.com/ownership/tec...1/article.html

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Old 10-06-2003, 22:24   #2 (permalink)
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Re: Why did Ford change the wheel offset in the AU?

No they will not fit
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Old 10-06-2003, 22:27   #3 (permalink)
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Re: Why did Ford change the wheel offset in the AU?

Commodore uses a differend Pitch Circle Diameter for the wheel studs and therefore will not fit
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Old 10-07-2003, 05:37   #4 (permalink)
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Re: Why did Ford change the wheel offset in the AU?

Quote:
Originally Posted by XRated
Anyway, that isn't the point of my thread. What I was wanting to know, is: Why did Ford introduce this different offset to the AU Falcon? Safety? Weight distribution? It's obviously an improvement, correct? But what is the actual reason behind it all?
The old wheel offset caused that typical falcon tyre scrub on the outer edges of the tyres. The only way to counter this wear was to fit a castor camber kit and run a relatively aggressive negative camber to counter act the scrubbing.

With the offset set closer towards the hub, tyre scrub is minimised without the need to run negative camber on the standard models.

The older offset was probably ran as older cars had a very wide body and to match the width the wheels had to be pushed outwards.
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Old 10-07-2003, 07:16   #5 (permalink)
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Re: Why did Ford change the wheel offset in the AU?

Thanks for your replies guys. XR_Strider_GuY, thanks for the detail in your answer about the offset :)
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Old 10-07-2003, 08:17   #6 (permalink)
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Re: Why did Ford change the wheel offset in the AU?

Actually, it's probably got more to do with the front wheel bearings being sealed for life and not part of the front disc/hub carrier. The AU disc sits over the top of the bearings/hub carrier, where earlier models had the bearings/hub carrier as part of the disc.

Anyone with a lowered AU who hasn't had tyres scrubbing must have their wheel alignments done every 3000km!
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