What are the different trucks?

Twenty different trucks have been made. There are four series - A, B, C, and D. The A and B series have three trucks each, the C series has ten trucks, and the D series has four trucks. The A series trucks have four wheels. The B series trucks have 6 wheels, the rear fenders dip between the wheels, and the wheels turn. The C series trucks have six wheels, the rear fenders are straight, and the wheels turn. The D series trucks are currently in production. They have six wheels, the rear fenders are straight, and the wheels do not turn. There are also different truck cab styles. The D series trucks are marked with either R1, R2, R3, or R4 on the cab. They can also be differentiated by the length of the cab roof. In order of shortest cab roof to longest cab roof, they are R1, R2, R3, and R4. For the D series, there are 36 different trucks if you are collecting color combinations. Four cabs, three stem colors (red, green, blue), and four cab colors (red, green, blue, and yellow). They ...  more