S ingle and D ual...for trucks, most likely.

On Wed, Jun 11, 2014 at 11:45 AM, Dave Mcneely <mcneely4@cox.net> wrote:

> I am getting information together for selecting new tires for my
> Volkswagen Vanagon GL Campmobile, 2.1 waterboxer, manual transmission.  It
> is tan, Scott.
>
> I am not intending to start a tire thread.  I have a single question.  In
> reviewing load data for several different tires, I see two different values
> given for the same tire.   The maximum load may be given as Load Range
> 106/104 followed by something like S65 psi 2094 lbs and D65psi 1994 lbs.
>
> What do the S and D terms mean (I know psi of course) and why the two
> different load index values and two different maximum loads given for the
> same tire?  I reviewed tire specification descriptions on TireRack.com and
> on USDOT web pages and found descriptions of load index and maximum load,
> but nothing about the S and D or different loads for the same tire.
>
> David McNeely
>