Motorcycle side car racing involves a motorcycle rider and a passenger on a custom-built motorbike chassis creating a three-wheel vehicle. Older sidecar road racers generally resembled solo motorcycles with a platform attached, though modern racing sidecars are purpose-built vehicles.
The rider and a passenger work together as a team to make the machine perform optimally; the way in which the passenger shifts their weight across the sidecar is crucial to its performance around corners.
Sidecar racing can be done on a dirt or road surface circuit. Sidecar racing has many sub-categories including: sidecarcross (sidecar motocross), sidecar trials, F1/F2 road racing, historic (classic) road racing.
- Motorcycling Road Racing — a motorcycle sport involving racing motorcycles as teams or individuals around a circular track. At the elite level it is in the form of MotoGP racing. Also known as Moto racing and Bike racing.
- Motorcycle Speedway — a Motorsport in which the motorcycles have one gear and no brakes, and race around a circular track. Also commonly known by just Speedway. Variations include Ice Speedway.