I’d say flat tires are the most common mechanical problem with mowers. They are an aggravation to fix for homeowners since they don’t notice them until the exact moment they are going to mow the grass. They also cause delays for lawn care companies like mine. But another problem with flats is the semi flat tire. The tire appears fine but has less air than in needs to get a level cut. I see many bermuda lawns that are butchered by lawn tractors. It is because of low air pressure in tires most likely. On a fescue lawn you would not be able to tell as much but bermuda looks back when it is cut unevenly.
