Yesterday I ran over what was left of a rusted tat trap, on the front of my MF 231. was just about finishing a small mowing job. The tire had lost all the air, but it was still on the rim. I was doing good, and had a couple more rounds, and it came unseated on the rim. I loaded up, and finished with my string line mower. The other odd thing I ran over was the bottom of a wine glass. I drove by a T post sticking out of a pile of dirt, and sliced my rear tire open. ran over a piece of PVC pipe sticking out of the ground, it flattened a rear tire. Thrones and sticks don't count. I have had many flats in my 26 years from them. Stan