When we got our 48"/24hp GS the merchant said the tires were ~10psi. When stepping up from a walk behind you WILL notice a difference, I agree, in what grades you can handle. Now if you're being foolish and trying to mow when it's wet, then you'd have to use a push mower.
We were skeptacle at first as well, but GS is going to be our next purchase.
Best Impressions Lawn Care - est. 1998
2 operations in different cities
(Expansion is awesome)
48" Grandstand and 52" Stander X
2 44" Toro WB's
Shindaiwa weed eaters
Stihl Backpack Blowers
Stihl and Husqvarna Chainsaws