I have this size on the front of my NH Boomer 33 and they are 4 ply. If I lift anything with the bucket it pretty much kills them. I seen they offer a 6 ply tire in this size but I would like something with 8 or maybe 10 ply. Is it possible to go up in size a little ? I prefer not to put an AG type tire on it as I am mostly on the lawn but a tougher tire for when I do need to pick up a bucket of sand or dirt would be good. Any recommendations ?