engine is 64HP, engine pulley is about 3.5", 14" driven pulley, 1800 to 2100 rpm at engine, have not cut yet, everything is on hold due to the heat and lack of funds.
The old mill I cut the tires round with a crown with an old file that I ground a cutting edge on its end and used it like a lathe tool while spinning the tire. No issues with inflatable tires as long as you maintain the pressure in them the same, if it goes low over the season the blade tracking is affected.