Just put on wider dual tires on combine yesterday. Firestone radial all traction 23 deg. 2 inside and 2 outside rims. 11 center pilot hole. About 1 or better of tread, these are not deep tread tires. Came off a Deere 9660 sts with heavy duty final drives. Some soybean pic between tread bars, but not bad. I dont see any cracks in tires.