Date:         Wed, 15 Dec 2004 10:56:47 -0800
Reply-To:     Mark Drillock <drillock@EARTHLINK.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Mark Drillock <drillock@EARTHLINK.NET>
Subject:      Re: Diesel mileage tire question (odometer accuracy)
Comments: To: Gnarlodious <gnarlodious@EARTHLINK.NET>
In-Reply-To:  <BDE5D038.62041%gnarlodious@earthlink.net>
Content-Type: text/plain; charset=us-ascii; format=flowed

195/75/14 is about the closest to stock common size though it is
slightly smaller than the stock 185R14 used on 1982 models. 185R14 is a
European size, sometimes called a 185/82/14, much taller than your
185/75/14.

The alloy wheel models came with 205/70/14 which is even smaller
diameter than 195/75/14 but a different speedo was used to account for
the more tire revs/mile.
What is the 3 digit number written on the speedo face of your speedo?
That number refers to the revs per mile that the cable must turn for the
speedo to be right. Tire companies usually give tire revs/ mile specs if
you look deep enough.

Mark

Gnarlodious wrote:

>I said:
>
>
>
>>>>>I got you beat, at 39 MPG (highway) I get over 400
>>>>>miles between fillups. (1.6 diesel).
>>>>>
>>>>>
>
>Chris DeLong said:
>
>
>
>>One thing to note is the size of tire on the front. This is where the
>>speedometer gets its signal. The rear tire size is pretty irrelevant if you
>>are tracking mileage via the factory odometer.
>>
>>
>
>OK, I measured the odometer inexactitude and it's .95012, which puts me at
>37 MPG. thanks for the headsup.
>
>Incidentally, these are front tires P185/75R14, what front tires should I be
>running for more accurate speedometer/odometer?
>
>-- gnarlie
>
>
>