If you are talking a regular residential size (21"?)push mower, I see no advantage. We had one years ago as a trim mower for our 2.5acres. It was a dynamark IIRC. Total ***. The rear axle assembly & brackets were junk, causing the rear wheels to be wobble. Horrible to manuever. Had to eventually fab up an axle with threaded rod for it. The thing was scrapped well before it should have been. If you want to get a hi wheel. Make sure it's commercial grade quality!
Joel