That's been my experience also, the 27's apparently bring the over-driven
speedo into almost exact perfection.

Karl

----- Original Message -----

> I have always wondered about the accuracy of the Vanagon speedo regardless
> of tires, so when I passed one of those portable radar wagons that the
> police use to display your speed (as a warning) I had to turn around and
> drive past it a few times.
>
> I ran past it 4 or 5 times at speeds of between 25 and 45 mph, with no
other
> cars aroun d.  In each case, my indicated speed on the radar wagon display
> matched my speedo within 1 mph or so.  I am running the 27" BFG tires, so
I
> was surprised by this.
>
> Anyone have any hard or anecdotal data that refutes this finding?  Anyone
> have any comments on the accuracy of the police radar?  (I assume that
with
> such a large frontal area the Vanagon produces a pretty clear radar image)
>
> Brent Christensen
> '89 GL Syncro Westy
> Santa Barbara, CA
>