Originally Posted by GLM
You asked which ones I would recommend. The 9" will do but the 12" will do better. Wider range of snow conditions - longer grass...
I'm suggesting the 12" based on my experience and the scale of the Cub - it's large in every way, large wing, tail etc.
What I can and will do for you tomorrow is set a pair of both next to it and take pictures for you. So you can get an idea of what I'm talking about then you can make the decision.
I know you recommended the 12". They just seemed pretty big. But you make them so you should know.