Sidecar-Cross racing , also known as Sidecar Motocross , is a race that uses a different motorcycle chassis than regular motocross . It also uses a team of two people riding together , a `` driver '' and a `` passenger '' . Sidecar-cross racing , also known as sidecar motocross , is very similar to regular , `` solo '' motocross but with a different type of motorcycle chassis , and with a team of two people riding together instead of one , a `` driver '' and a `` passenger '' .