This is a 1940's Colson chain driven tricycle is wonderful unrestored condition. It is in terrific initial working condition. You can get on it and ride it today. It is a big tricycle! The back wheels are 12" and the front one is 16" and all the tires are in great condition for it's age. The rear wheels are ball bearing and the bike functions completely. Call Allan's Place Restorations at (262)745-7 4 7 one.