The 29 inch by ten tires are stiffer than Hogan's goat, even after they've been buffed down, which primarily removes weight, but doesnt' really improve flexibility much.
I like the 8.50 X 10 tires on a Cessna, and have run them on Cubs as well. They work okay, and are a decent tire for pavement and off airport, to some degree. They flex a LITTLE better than the 29's I think, but that's subjective.
To me, the 29's are too big, too heavy, and don't really offer much advantage, EXCEPT if you are landing in SOFT stuff, like sand. Then, footprint is king.
Otherwise, I'd stick with the 8.50 X 10, the 26 inch Goodyears, or the 8.50 X 6.00 tires.
MTV