My Kees ZTMax almost went over a wall today. It got stuck against it on a hill with the wall at the bottom, that seperates another level. (Really steep) I'm not really happy with the Titan Turf Trac tires on it. Who has the best tire for this application, they are 23-10.5/12's. <p>Also, you Lazer guys, does the 24-12/12 optional tire fit the same rim as the standard tires, or is it a different wheel also?