Anyone know where I could get these? I was mowing last week and when I backed up the tire came off the rim due to a thorn piercing the tire letting some of the air out. I have patched the tire and its holding air but would like to upgrade the tires to a flat proof tire. Toro suggests 50psi in the tires so I was thinking a hard rubber tire wouldn't ride much different. I searched the web and didn't see anything in this size that was flat proof. It really sucks to have to walk after riding all of the time!!