Abstract: A self-propelled trailer may be attached to a bicycle. The speed of the trailer is adjusted based on a signal from a force gauge which indicates whether the bicycle is pulling the trailer or the trailer is pushing the bicycle. In the former situation, the force gauge indicates a tensile load, and in the latter situation, the force gauge indicates a compressive load. Based on the feedback from the force gauge, the speed of the motor attached to the self-propelled trailer is adjusted so that the trailer and bicycle are moving at the same speed or the bicycle is pulling the trailer.

Abstract: A bicycle may tow a trailer for the purposes of carrying a heavy or large object across great distances. A motor may be mounted to the trailer which drives a rear wheel of the bicycle. To this end, a transmission is added to the rear hub of the bicycle which is mechanically coupled to the output shaft of the motor. When the trailer is detached or not used in conjunction with the bicycle, the rider does not have to carry the weight of the motor. Also, this setup provides a stable configuration since the bicycle is pulling the trailer.

Abstract: A self-propelled trailer may be attached to a bicycle. The speed of the trailer is adjusted based on a signal from a force gauge which indicates whether the bicycle is pulling the trailer or the trailer is pushing the bicycle. In the former situation, the force gauge indicates a tensile load, and in the latter situation, the force gauge indicates a compressive load. Based on the feedback from the force gauge, the speed of the motor attached to the self-propelled trailer is adjusted so that the trailer and bicycle are moving at the same speed or the bicycle is pulling the trailer.

Abstract: A bicycle may tow a trailer for the purposes of carrying a heavy or large object across great distances. A motor may be mounted to the trailer which drives a rear wheel of the bicycle. To this end, a transmission is added to the rear hub of the bicycle which is mechanically coupled to the output shaft of the motor. When the trailer is detached or not used in conjunction with the bicycle, the rider does not have to carry the weight of the motor. Also, this setup provides a stable configuration since the bicycle is pulling the trailer.

Abstract: A bicycle may tow a trailer for the purposes of carrying a heavy or large object across great distances. A motor may be mounted to the trailer which drives a rear wheel of the bicycle. To this end, a transmission is added to the rear hub of the bicycle which is mechanically coupled to the output shaft of the motor. When the trailer is detached or not used in conjunction with the bicycle, the rider does not have to carry the weight of the motor. Also, this setup provides a stable configuration since the bicycle is pulling the trailer.

Abstract: A bicycle crossbar for attachment between a head tube and seat tube of a bicycle and for providing cable concealment and increased structural integrity to the resultant bicycle frame. The crossbar comprises an elongate, rigid tubular member having a groove formed within and extending longitudinally along the side wall thereof which is sized and configured to accommodate three cables of the bicycle. The crossbar is formed in a manner wherein the side wall, including the groove formed therein, is of greater thickness at its end portions. The crossbar further includes first and second cable receiving members which are rigidly secured within the groove and adapted to facilitate the entrance and exit of the three cables into and out of the groove.

Abstract: An improved vertical dropout assembly for attachment to a bicycle frame is disclosed which comprises an easily replaceable vertical dropout member and an interchangeable derailleur hanger system. The dropout member is configured to allow the adjustment of the rear wheel within the frame of the bicycle and to provide improved clearance between the frame and chain. The derailleur hanger system is operable to position any make of derailleur at its optimum location with respect to the rear wheel and is adapted to be easily replaced in the event of an accident.