>Regardless of whether chains are ever installed, LESS rubber
>on the road is better for snow traction (more psi on the
>ground).

I am more inclined to believe that the design of the tire is more important
than the size (width), as long as reasonable size limitations are enforced.
Given two tires of the same height and width, one a racing slick and the
other a sand drag paddle tire, the obvious differences stand out.  In a more
reasonable comparison the various all - weather tires have certain
characteristics that put them into a common performance category.  In this
case it may be wiser to stick to a "smaller" tire, but brand differences
should be considered as "all - weather" is not a standard, but a marketing
term.

This in mind, the well designed road tire will handle most driving
conditions that one encounters in day to day travel very well as long as the
driver is skilled and alert.  I have no doubt that a good snow and ice
radial ( perhaps a Blizzak) even if it is larger than it's all - weather
cousin will do a better job in blizzard conditions.  I would say the same in
comparing a rain tire to a general purpose tire in rainy conditions, etc.

Anyway, the reasonable size restraint has to be germain to the discussion.
A smaller tire will not necessarily be a better snow tire.  We need to
seriously consider the terrain, weather and type of driving we will engage
and buy accordingly.  It is probably a good idea to have a set of winter
tires, and a set of summer tires in some areas.
Respectfully,
Steve

>About the only real advantage a Vanagon owner
>might get from larger tires is the possibility of more load
>rating.  That might be useful once--offset by the fuel
>economy penalty of moving bigger, heavier tire every day.
>