Model 830 with 850 arms and 2" quick change pins
The 830 combo unit consist of the Model 830, Model 850 arms and 2" quick change pins.
Use the Model 830 for 320 to 520 metric tire sizes or 12.4", 14.9", 18.4", or 20.8" tires. The hight of the tire does not mater.
You can interchange the Model 830 arms with the Model 850 arms by just unbolting them. Then you can do tire sizes from 580 to 800 metric.
You also get the quick change pins to remove combine duals.