What is the big deal about MPH being not accurate with different tires. Is
there a police following you ready to give a ticket? Is it really that
important to be so accurate? Does 3 to 4 miles per hour really matter that
much.

Please enlighten me as to why it is so important.

William Polowniak
1989 Vanagon GL
1988 Mercedes 300 SE

Subject: Re: right sized tires, wrong speed indication

> At 10:22 PM 2/18/2002, Bradley Flubacher wrote:
> >My '84 westy cruises nicely at 75-80 MPH, according to the speedometer.
> >It's got to be wrong. I suspect by about 10-15 MPH.  Any suggestions? My
> >tires are the correct size..
>
> So does mine...why has it got to be wrong?  Do some times on mile markers
> and see.  Actually my speedo reads almost exact at 70 with 205/70-14
> tires.  With the 185/75?-14 it was maybe 3-4 mph high at 70.  The '84s had
> a much larger tolerance on the speedo calibration than later ones, but I
> think what I described is typical, i.e. the speedo is set up for 805 turns
> per mile and the 185 tires do more than that.  But not 10-15 mph more.
>
> david
>
>
> --
> David Beierl - Providence, RI
>   http://pws.prserv.net/synergy/Vanagon/
> '84 Westy "Dutiful Passage"
> '85 GL "Poor Relation"