I have used the Harbor Freight manual tire changer to R&R motorcycle tires. These were all street bikes, not any dirt bikes.
It does a fine job breaking the bead on those narrow rims, but I have not personally tried with a car or truck tire.
I do know people that have used it for car tires including low profile autocross tires. It does work for not just breaking the bead but also dismounting and mounting car tires. It will take some muscle and elbow grease.