Nice overview of winter tires from the German OffRoad Magazin, with actual
circumference in millimeters (devide by 3.14 for diameter, device once more
by 2.54 for inches):

http://www.off-road.de/reifen/home.html
(select pull-down menu on the right)

Or the tallest/16" winter tires in specific, directly:

http://www.off-road.de/reifen/wi16met.html

Interesting: even the winter-specialist Nokia can now be had in the tallest
size, 2532mm, yet in a nice narrow ratio too: 235/85x16.
(the printed version mentions explicitly that the rubber/thread/siping
technology from Bridgestone benefits from more contact patch (or a wider
tire), at least on snow and ice....but for aquaplaning a wide tire will stay
a disadvantage for ever....)

Btw, I had already scanned that article for some friends, also listing
pictures of the various thread patterns....if anyone wants a scan for that
purpose, mail me privately (the file size is quite large, otherwise you can't
see much detail, with too much compression).



--
Bye,

Willem-Jan Markerink

The desire to understand
is sometimes far less intelligent than
the inability to understand

<w.j.markerink@a1.nl>
[note: 'a-one' & 'en-el'!]