I needed new tires for my 54 inch Husqvarna mower because one of them had a shear. The bushing had to be replaced. I was a bit scared about the tire change, but it actually went well. put the old tire and the new one on the rim. Old tires are 2-ply, these "rated" tires are 4-ply. Seems to be a decent tire. Mine arrived boxed and in perfect condition so there was no need to put them in the sun etc. As others have said time will tell how long they will last but my first impressions are they are at least that will last long and original it only took me 1 pry bar to remove the tire from the rim and replace with a new tire.