We have a Toro diesel (60 inch deck). Runs great. Right rear tire just fell off today. Sheared 3 of the 4 bolts off that hold the wheel on. Took it down to the mechanic and he said this happens all of the time with diesels (exmark, toro) because the power is so strong. Then they told me they put stickers on all of the new mowers (diesels) because the lugs become loose and fall off. I was puzzles. We have always had gas mowers and not once have we ever had this happen. Just curious if this is a normal thing. We have to get the bolts replaced and a new rim. Not covered under warranty. Just seems bizaar to me. We generally keep up with the equipment pretty well. Seems like an engineering issue to me.