Bicycles
Pedal
Plastic/Iron/Steel/Trucks
Chain
Steel/Iron/Fuel/Trucks
Tire
Fuel/Rubber/latex/Trucks
Spoke
Steel/Iron/Fuel/Trucks
Hub
Steel/Iron/Fuel/Trucks
Environmental
Economic
Frame
Iron/Steel/Truck
Seat
Foam/Leather/Rubber
Handle
Plastic/Rubber
Casset
Steel/Iron/trucks