the coach has 4 wheels
A standard coach typically has four wheels. However, larger coaches, such as double-decker buses, may have six or more wheels to support their size and weight. The exact number can vary depending on the design and purpose of the vehicle.
Bogie
You have to be more specific on what kind of coach. I also need to know the age level as that is critical to success.A coach that is a vehicle, needs seats, wheels and a method of propulsion.
6' 7" with stock wheels and tires...
A wagon has 4 wheels.
A bike with 4 wheels has 4 wheels.
A tram can be a monorail without wheels.
2 wheels
2 wheels
4 Wheels
Concorde has 10 landing wheels - how many internal "wheels" is any ones guess
Becaks have Three wheels