I did notice the load difference but knowing squat about rims and tires what you say seems to make intuitive sense.
So I can conclude that the 225s are well within the 3% difference figure (1.3), are slightly skinnier (not a bad thing for winter tires), and are reasonable fit for loading etc...
The question remains, will I be able to use my winter rims, that previously had 235s, for the size 225 tires?
