Today you can still find tractors with belts instead of wheels, you can find tractors with metal wheels and so forth. Many run and some are even in regular use. This is a testimony to the great building technique and the durability of the material used in these tractors. The mechanism is simple, which is why it is easy to fix when something breaks down. The problem today is that spare parts are hard to come by. None are produced any more, but it is no reason to despair. There are plenty of options, check out our Repair andfix page for more information on this.