Has anyone run 195/60-15 on 4000Q?

Ti Kan ti at amb.org
Tue Apr 8 13:04:43 EDT 2003


195/60-15 has too large a rolling circumference for the 4Kq and would
cause your speedometer to read low and the effective final drive ratio
to be made higher, hurting acceleration.  In fact your current 195/55-15
is also somewhat larger than what it should be.  If there a reason why
you want to go with these tall tires?

Specification  Sidewall  Radius  Diameter  Circumference  Revs/Mile  Difference
195/60-14         4.6in  11.6in    23.2in         72.9in        869        0.0%
195/55-15         4.2in  11.7in    23.4in         73.7in        860        1.0%
205/55-15         4.4in  11.9in    23.9in         75.0in        845        2.9%
195/60-15         4.6in  12.1in    24.2in         76.1in        833        4.3%
195/50-15         3.8in  11.3in    22.7in         71.2in        889       -2.3%
205/50-15         4.0in  11.5in    23.1in         72.5in        874       -0.6%

-Ti
2003 A4 1.8T multitronic
2001 S4 biturbo 6-sp
1984 5000S turbo
1980 4000 2.0 5-sp
--
    ///  Ti Kan                Vorsprung durch Technik
   ///   AMB Laboratories, Sunnyvale, CA. USA
  ///    ti at amb.org
 //////  http://www.amb.org/ti/
///

VFChris at aol.com writes:
> I have an 86 4000Q fitted with '90 100 wheels (15x6ET45).  I currently run =
> 195/55-15 tires, and was wondering whether I could run 195/60-15 without an=
> y trouble.
>
> The car is not lowered, in fact, it is even a litle bit raised; I installed=
>  stock 90Q spring in the rear to fix (a little over-fixed) the sagging cond=
> ition that seems to happen to a lot of 4000Q's.  I'm quite happy with how i=
> t sits, though.
>
> So, back to my quesiton, has anyone run the size tire I am considering, and=
>  have you found any problems with it?  I think the potential interference p=
> oints are the rear of the rocker panel trim (as it terminates at the begini=
> ng of the rear wheel-opening), and the outer tie-rod-ends (looks kinda clos=
> e right now!).
>
> FYI, I had run 205/55-15 before, which did fit without interference, but I =
> felt the car didn't handle right.  I stepped down to the 195/55-15, and fou=
> nd a noticable improvement.





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