A motorcycle trailer is either a trailer used to carry motorcycles or one to be pulled by a motorcycle in order to carry additional gear.
Motorcycle carrying trailers may be open or enclosed. They may be wide, for two machines side-by-side, or narrow, for just a single machine. The main features that distinguish them from other flatbed or enclosed trailers are track(s) to keep the wheels from sliding side to side and sufficient tiedown points to keep the motorcycle(s) from tipping. They may also tilt, or include ramp(s) to facilitate the loading and unloading of motorcycles. Trailer manufacturers often offer trailers specifically designed for carrying motorcycles.
General purpose enclosed trailers, as seen in the photo above left, have the advantage of providing a more secure way of locking up the motorcycles contained within it, keeping them out of sight, and protecting them from all kinds of weather. However, as they are heavier than open trailers and create more wind resistance, pulling a general purpose enclosed trailer can decrease the fuel efficiency of the tow vehicle. Conversely, an enclosed motorcycle-specific trailer can be built low enough so that wind resistance is reduced. As a result, fuel efficiency is better than towing a general purpose enclosed trailer.
Collapsible or folding motorcycle trailers are available to overcome storage problems that might prevent use of a non-collapsible trailer, some such trailers are sufficiently compact to allow the user to carry the trailer in the trunk of a car when not in use.
The basic motorcycle trailer design consists of a fixed platform mounted above an axle, which requires the motorcycle be loaded by physically lifting it or rolling it up a ramp onto the platform, potentially a difficult problem when dealing with a heavy touring machine or one that has been disabled. Since the latter half of the 20th century a number of different trailer styles have been devised to make loading motorcycles on them easier. Broadly, such designs include:
Trailers towed behind motorcycles are distinguished by their relatively small size, especially narrow wheelbase. They are also often styled to match the look of the motorcycle they are intended to be towed behind. This styling can include the overall shape, fender shape, lights, chrome, etc.
Cargo trailers provide extra storage space on for bikers whose motorcycles have little storage. The most popular models are made of fiberglass or aluminum and ride on two wheels.
Motorcycle Utility trailers are uncovered, single-axle, flatbed trailers. These trailers are designed to be towed by a motorcycle, so they are much smaller than standard open trailers which must be towed by a four-wheel vehicle.
Two types of trailers prevail within the motorcycle camping trailers category: clamshell and platform camper trailers. Fabric material is attached to the top and bottom halves of the clamshell trailer. The tent is created when the trailer is opened. Once a platform camping trailer is opened, however, the tent is pitched on it. These platform style camping trailers are larger than clamshell camping trailers and can fit full-sized to king-sized air mattresses. Most often, clamshells can only accommodate a single occupant.