The seats on most motorcycles are located behind the gas tank and are designed to carry one or two passengers. Some seats have small cargo compartments underneath or behind them to carry small items. Add-on hard plastic boxes or leather pouches called saddlebags may be installed on either side of the rear wheel or over the rear fender to increase cargo carrying capacity.
Large motorcycles may also be fitted with a trailer hitch to pull a small trailer. A sidecar is an add-on accessory that can be installed to carry an extra passenger. The sidecar has its own wheel for added support and may have an enclosed seating compartment for all-weather riding.