Run Flat Proof Oregon 72-739 Tire Assembly Semi-Pneumatic 13x500-6

tire is great but item arrived with out the ability to install it. The bearing is a 1" hole the shaft on the mower is a 1/2" shaft. I had to take apart my old tires bearings and grind down the center hubs to fit the 1" hole to install these tires. They should have sold me an optional hub reducer to make these work day 1.