I don't think people that haven't compared the extra soft sidewall of the 35 to the stiffer 31 will ever understand till they fly both.
That is a true statement.
I notice that the total includes the wheels... Great way to compare. Take each off. Next time I get the 31's off I will put them on a scale.
Can't imagine why I would ever land where there are 18" logs when the engine is still running and i'm not on fire.
I think 31s look great on a Cub.
IMHO
YMMV
because you didn't land there, and kill the big moose.....