Inverted tube forks have been used on sport bikes for years. Both configurations essentially work the same way. Conventional tube forks have the smaller tubes fixed to the triple trees, while inverted tube forks have the larger tubes mounted to the triple trees. Tube forks are available in conventional (traditional) and inverted configurations. Hydraulic fluid levels must be checked periodically to insure proper operation. Traditionally the rigid portion of the tubes are joined to the frame, via the triple trees, while the wheel axle is fastened to the active (live) forks. Internal springs and hydraulic fluid serve to dampen the movements of the tube forks to smooth out the ride, just as on an automobile, providing the active suspension for the front wheel. The smaller tube slides in and out of the slightly large tube that is sealed around it. Tube forks incorporate an internal shock and spring in one sealed unit. Understanding the characteristic differences between tube forks, springer forks and girder forks should help make choosing the right set easier when creating a custom chopper. Motorcycle forks also provide the suspension and framework for mounting brake components and fenders. The primary function of forks, however, is to attach the front wheel to the motorcycle. When it comes to creating a custom chopper or customizing a motorcycle, the front forks (front end) of a motorcycle will have a significant impact on both the ride and aesthetics.

Motorcylce girder front end