Motorcycles with sidecars are not usually considered tricycles. There are even examples of motorcycles with stretcher-carrying sidecars. Several flexible sidecars, not rigidly attached to the motorcycle, have been developed. The speedway runs from August to March and caters to cars, solos and sidecars. Also, most of BMW's offerings were still designed to be used with sidecars. Lyons admired the sidecars and bought one. IBM advised against adding more than four sidecars. These sidecars all offered good protection from the elements. Mia's grandmother, who loves Sidecars, is highly critical of everyone around her. She smokes often and enjoys drinking sidecars.