A frame for an electric bicycle, such as a long-tail electric cargo bicycle, is described. The bike frame, in some embodiments, includes cross members that connect a rear rack of the bicycle to a head tube of the bicycle via a seat tube of the bicycle. Via the multiple connection points, the cross members mitigate side to side movement, such as waggling, of the rear rack of the bicycle.

A frame for an electric bicycle, such as a long-tail electric cargo bicycle, is described. The bike frame, in some embodiments, includes cross members that connect a rear rack of the bicycle to a head tube of the bicycle via a seat tube of the bicycle. Via the multiple connection points, the cross members mitigate side to side movement, such as waggling, of the rear rack of the bicycle.

A guide element for bicycle drive means includes a main bearing pin for fixing a swing arm bearing. Further, a spacer sleeve is provided which is arranged on the main bearing pin for reducing a distance between a drive ring and a bicycle frame element.

Methods and apparatus for a composite bicycle front sprocket are disclosed herein. One embodiment discloses a composite bicycle front sprocket assembly having an outer assembly of a first material. The bicycle front sprocket assembly also has a center assembly of a second material. The center assembly is disposed at least partially within the outer assembly. The center assembly is irremovably coupled with the outer assembly. The center assembly is irremovably coupled with the outer assembly without an external fastening device to irremovably couple the center assembly with the outer assembly.

Methods and apparatus for a composite bicycle front sprocket are disclosed herein. One embodiment discloses a composite bicycle front sprocket assembly having an outer assembly of a first material. The bicycle front sprocket assembly also has a center assembly of a second material. The center assembly is disposed at least partially within the outer assembly. The center assembly is irremovably coupled with the outer assembly. The center assembly is irremovably coupled with the outer assembly without an external fastening device to irremovably couple the center assembly with the outer assembly.

A vehicle may have a seat and front wheel similar to those of a bicycle. However, the vehicle may have two rear wheels. The position of the two rear wheels may be adjustable. When the two rear wheels touch each other, the vehicle may function as a bicycle. When they are moved apart, the vehicle may function as a tricycle. In tricycle mode, the vehicle may travel autonomously without a human rider. In bicycle mode, a human may ride the vehicle like a bicycle. To transition between bicycle and tricycle modes, each rear wheel may rotate about a horizontal axis that is parallel to a longitudinal axis of the vehicle. In some cases, a bike chain is connected to only one of the rear wheels. In bicycle mode, motion imparted by the chain to one rear wheel may be transferred to the other by friction.

A vehicle may have a seat and front wheel similar to those of a bicycle. However, the vehicle may have two rear wheels. The position of the two rear wheels may be adjustable. When the two rear wheels touch each other, the vehicle may function as a bicycle. When they are moved apart, the vehicle may function as a tricycle. In tricycle mode, the vehicle may travel autonomously without a human rider. In bicycle mode, a human may ride the vehicle like a bicycle. To transition between bicycle and tricycle modes, each rear wheel may rotate about a horizontal axis that is parallel to a longitudinal axis of the vehicle. In some cases, a bike chain is connected to only one of the rear wheels. In bicycle mode, motion imparted by the chain to one rear wheel may be transferred to the other by friction.

An e-bike includes a frame defining a compartment, a battery mounted in the compartment, a main shaft mounted to the frame, a motor connected to the main shaft and configured to rotate the main shaft, a set of pedals disposed on the main shaft and configured to rotate the main shaft, and a drivetrain mounted on the frame and configured to transfer rotation of the main shaft to at least one wheel.

A rear wheel linkage system for connecting a rear wheel of a chain wheeled vehicle to a frame of the chained wheel vehicle, the chained wheeled vehicle having a front side, a rear side, and lateral sides, and comprises a pair of upper links, a pair of lower links, and a coupler link. The upper links are configured to be hingedly joined to first locations of the frame, at a rear of the frame above or near a top of the rear wheel. The lower links are configured to be hingedly joined to second locations of the frame, ahead of the rear wheel. The coupler link is configured to be hingedly joined to both sides of an axle of the rear wheel, the coupler link has an upper side, a lower side, and a front side and to be hingedly joined to upper links, the lower links, and the frame.

A rear wheel linkage system for connecting a rear wheel of a chain wheeled vehicle to a frame of the chained wheel vehicle, the chained wheeled vehicle having a front side, a rear side, and lateral sides, and comprises a pair of upper links, a pair of lower links, and a coupler link. The upper links are configured to be hingedly joined to first locations of the frame, at a rear of the frame above or near a top of the rear wheel. The lower links are configured to be hingedly joined to second locations of the frame, ahead of the rear wheel. The coupler link is configured to be hingedly joined to both sides of an axle of the rear wheel, the coupler link has an upper side, a lower side, and a front side and to be hingedly joined to upper links, the lower links, and the frame.