I'm still amazed that the 18" upgrade has less carry capacity than the 14/15" rims.
now I don't know if that's in the torsion vs leaf or simply the rims but our last boat had 18's and trailer on 15's had a higher carry capacity by 750lbs.

our new whip sits on 14's if you can believe it and the trailer tows much better than the old trailer on 18's. this is same boat/same trailer.