Some of that makes sense except that a 700 x 32c tire isn't a 29er. It's Imperial measurements are actually only 28 x 1 1/4 inches. Even a 700 x 50 isn't a 29er. It's actually only 28 x 2.00 inches. Something in the order of a 57-622 would give 29 x 2.25 inches.


The other thing is that I can't think of any good reason to run any tire width of over 1 1/2in at 60PSI. Anything from 25 to 45 would be more reasonable.


So yeah, in similar tire widths and with similar tire pressures, a 29er would definately have a slightly greater contact patch. It's probably debatable if that's of any real advantage though. The flip side is that a smaller rim is naturally stronger and more rigid with a similar spoke count.