LEGO Technic 42007 Moto Cross Bike (Discontinued by manufacturer) 2-in-1 model: Rebuilds into a Speedway Motorbike with front suspension, rear suspension and engine with moving pistons Features chain-drive, working pistons, front and rear suspension and knobby tires Absorb the biggest bumps with the working suspension! See the pistons move! Kick up the dirt with knobby rubber tires! Build a realistic chain-drive! Measures over 6" high, 12" long and 4" wide ; Speedway Motorbike measures over 5" high, 11" long and 4" wide