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 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. Types The basic motorcycle trailer design consists of a fixed platform mounted above one or more axles, 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: Tilt-bed, wherein the platform teeters on the axle, bringing the tail of the trailer to ground level. The motorcycle is pushed or ridden onto the trailer bed, which in some designs automatically tilts back to the horizontal and locks in place when the load moves forward of the bed pivot point. Such designs still require the machine be pushed up an inclined plane. Drop-bed, wherein the platform is