The Harley Davidson 18-J is an American motorcycle first manufactured in 1918.
The MC 18J Sidecar is a light vehicle featured in Battlefield 1. It is the motorcycle of the Allied Powers, and is used by the British Empire, Kingdom of Italy, and French Republic. It can seat two players, a driver and a passenger in a sidecar who has access to their kit for self-defense. As with the M30 Scout, players enter the seats from different sides.
- Although of American design, none of the maps featuring the US Army feature motorcycles.
- The tread pattern on the tires read "non-skid", corresponding to a real World War 1 era tire manufactured by Firestone.