different widths of alloy wheels in Quattro

[Kowi87]

Hi
Wants to buy a new replica of the CCW to A4 Quattro. Rims are the parameters:
Front: 18/8,5" ET45
Rear: 18/9,5" ET40
Tires will 4x215/40

Is such a setup will not damage the drive Quattro? Someone uses different width wheels drive Quattro?

[fed0ra]

The width shouldn't affect it, its the rolling diameter of the wheels that is a problem. You don't want the same size tire on both front and rear if the widths aren't the same. There is a calculator out there somewhere that tells you what the rolling diameter will be for a certain size tire on a certain width wheel. I think you can have a few percent difference between the wheels, so try to get it as close as possible.

Here is some info on tire/wheel sizing and awd: http://www.tirerack.com/tires/tirete....jsp?techid=18.

But, ultimately, you are only going to hurt your performance. Stick with one size wheel for all four corners.

[Kowi87]

I checked the parameters on the calculator and goes something like this


Diameter---------------629.2mm 629.2mm
Circumference---------1976.7mm 1976.7mm
Poke ---------------------63mm 80.7mm
Inset--------------------153mm 160.7mm
Speedo error------------0% 0%
Reading at 30mph-----30mph 30mph
Reading at 60mph-----60mph 60mph
Ride height gain-------0mm 0mm
Arch gap loss-----------0mm 0mm

[fed0ra]

If the rolling diameter is the same then you should be alright. I know with bigger differences in width different tire sizes are needed, but I guess 1" difference isn't enough to require that.

I guess go for it, since the rolling diameter doesn't change and the contact patch doesn't change (or at least the change is negligible) .