Which brands? It sounds like Pro-Skis (50x~70mm) in Norway and Sweden
and Marwe in Finland (40x80mm).

Gene

Anders wrote:

BTW the most popular Swedish and Norwegian rollerskis have 50mm wheels
(with a roughly 70mm diameter), but in Finland the favourite models
have 40mm wheels (with a 80mm diameter).

I suppose you mad daredevils in N.A. go for the narrowest wheels you
can find?:-)

Anders