Question about 1998 A6 Avant wheels/tires

[Ti Kan]

Scott Colebank writes:
> [ 1998 A6 2.8 Avant tires ]
> ...
> tires I was bidding on were 205/55R16, however, what I received was size =
> 215/55R16. I double checked the listing and it was correct, just my =
> oversight in not noticing this difference. The Audi wheels received are =
> part 4BO601025G, supposedly off a new 2001 A6 2.7T Quattro. So now the =
> question: do I have a problem with this purchase or not?

Generated by the handy tire size program:

Specification  Sidewall  Radius  Diameter  Circumference  Revs/Mile  Difference
205/55-16         4.4in  12.4in    24.9in         78.2in        811        0.0%
215/55-16         4.7in  12.7in    25.3in         79.5in        797        1.7%

With the 215/55-16, you will have a 1.7% error in your speedometer reading
(it will read low by 1.7%), as well as affect the trip computer and odometer
accuracy.  It's up to you whether that's acceptable or not.

The factory A6 2.7t stock wheels are indeed the 215 size, but I surmise
that the speedometer is calibrated to match.

Note, though, that the 1.7% figure is based on theory.  Actual tire sizes
vary somewhat from manufacturer to manufacturer as well as model to model.

-Ti
01 S4 2.7 biturbo quattro
84 5000S 2.1 turbo
80 4000 2.0
96 A4 2.8 quattro (sold but not forgotten)
-- 
    ///  Ti Kan                Vorsprung durch Technik
   ///   AMB Research Laboratories, Sunnyvale, CA. USA
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