2" rollers for Combine Duals fits models 51 and 55
If you want to use your EZ Dual Changer on combine duals, you will need to replace the 5" rubber wheel with a 2" wheel. The rim on the combine duals is dished out on one side, so the 5" wheel does not have enough clearance. Just slide the 5" wheel off and slide the 2" wheel on. Works on all EZ Dual Changer models.