Re: Larger wheels screw up quattro?

[Dave Ohlemacher <Dave@ohlemacher.com>]

I was referring to the overall wheel+tire diameter.

Dave

Mike Sylvester wrote:

> Wheel diameter or tire diameter?  The wheel diameter should not matter at
> all.
> Its the tire diameter that is the issue.
>
> If you have a tire diameter difference of 2" from front to back in an older
> quattro,
> say an '87 5KCSTQ and you were to lock the center diff, I would expect a
> severe problem.  An increase of 2" in diameter would be a 6.3" difference in
>
> rolling distance per revolution.  The smaller tire could not keep up.  Since
> the
> diff is locked the car would not move very far or you would break something.
>
> The A4 with the automatic center diff might be OK, but it might start to
> lock the
> center diff because of the difference in tire rpm.
>
> None of this applies, of course, if ALL of the tires are changed to a larger
> size.
> Then only the speedometer is wrong.
>
> Mike Sylvester
>
> 94 100CS Q
> 86 5KCSTQ
>
> > -----Original Message-----
> > From: Dave Ohlemacher [SMTP:Dave@ohlemacher.com]
> > Sent: Wednesday, February 03, 1999 9:01 AM
> > To:   Jason Palmer
> > Cc:   quattro@coimbra.ans.net; Rob Andrews
> > Subject:      Re: Larger wheels screw up quattro?
> >
> > I agree with Rob.
> >
> > The only time sizing will 'screw anything up' is with ABS, guidelines from
> > Bosch are that the front and rear wheel diameters shouldn't differ by more
> > than 2-3"
> >
> > Dave
> > 91 200tqw
> >
> > Jason Palmer wrote:
> >
> > > He didn't buy an A4 because someone told him using a different sized
> > > wheel would 'screw up' quattro?
> > >
> > > But +1 or +2 sizing on all 4 wheels and using the proper tire sizes
> > > Plus sizing system will not result in 'screwing up' quattro.
> > >
> > > > I was out looking for some car audio stuff today and
> > > > the guy started talking about my a4.  He said he
> > > > didn't get one because one of the audi techs told him
> > > > he has seen problem with cars with quattro getting
> > > > screwed up because larger wheels were put on them...
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> >