A seal for a bicycle drivetrain is configured to shield and protect part of the bicycle drivetrain from contamination by materials commonly found in the cycling environment, namely dirt, oil, water and other debris found on cycling surfaces. The seal is configured to shield the bicycle drivetrain from grit that may foul lockring interfaces, leading to seized threads, and cause difficulty removing the lock ring when it comes time to service the motor or replace the chainring.

A crank arm for a bicycle may include a body extending along a body axis and having a first body end and a second body end axially spaced apart from the first body end. The insert may also include an insert provided toward the first body end. The insert may include a base portion having a radially outer surface. At least one extension may extend outwardly from the radially outer surface and may be encased within a corresponding recess in the body whereby relative planar movement between the body and the at least one extension in a first plane. The retaining portion may have a retaining portion width measured in the first direction and the retaining width may be greater than the throat width thereby inhibiting relative radial movement between the at least one extension and the recess and preventing radial extraction of the extension from the corresponding recess.

A crank arm for a bicycle may include a body extending along a body axis and having a first body end and a second body end axially spaced apart from the first body end. The insert may also include an insert provided toward the first body end. The insert may include a base portion having a radially outer surface. At least one extension may extend outwardly from the radially outer surface and may be encased within a corresponding recess in the body whereby relative planar movement between the body and the at least one extension in a first plane. The retaining portion may have a retaining portion width measured in the first direction and the retaining width may be greater than the throat width thereby inhibiting relative radial movement between the at least one extension and the recess and preventing radial extraction of the extension from the corresponding recess.

A process for manufacturing a bicycle component and a bicycle component manufactured by the process. The process includes protecting a printed circuit board, inserting the protected printed circuit board into the mold cavity, inserting a composite material into the mold cavity so it is around and in contact with the circuit board, and subjecting the mold cavity to a temperature and pressure profile until the composite material hardens.

Disclosed herein is a threaded bottom bracket comprising: an internal sleeve, a ball bearing, wherein an inner race of the ball bearing is an extended inner race, a cup fit to concentrically hold the ball bearing, wherein the cup is coupled to the internal sleeve, a labyrinth, the labyrinth coupled to the ball bearing and fit to prevent water and debris from entering the ball bearing, wherein the labyrinth and the cup form a path, and a rotary seal disposed between the ball bearing and the labyrinth, the rotary seal having an external seal that seals against the extended inner race.

An electric tricycle with a tricycle frame, at least two pedals, and an electric motor. The tricycle frame has a steering assembly with handlebars and a front wheel and a rear wheel assembly with two rear wheels mounted on a rear axle. The pedals are rotatably coupled to the rear wheel assembly. The pedals have an engaged configuration where the pedals are engaged with the rear axle and a disengaged configuration where the pedals are disengaged from the rear axles. The electric motor is mounted on the rear wheel assembly and is electrically coupled to a battery. The electric motor is configured to engage with the rear axle when the pedals are in the disengaged configuration. The electric motor may have a forward clutch to rotate the rear axle in a first direction and a reverse clutch to rotate the rear axle in a second direction opposite the first direction.

An exercise device for performing exercises suitable to strengthen thigh and hip muscles such as a leg press machine, a total hip, a stationary bicycle, or a moving bicycle, and more particularly provides an exercise device for strengthening thigh and hip muscles while protecting the knees and ankle joints by enabling a user to locate a lower end of an arm on the user's thighs in a sitting, prone or supine position and move the user's legs in order to minimize a load or stress added to the knee and ankle joints.

A bicycle pedal assembly includes a crank arm, one end of which is pivotally connected to a propulsion axle of a bicycle and another end of which is pivotally connected to a first pivot at one end of an auxiliary crank arm. A pedal is connected to another end of the auxiliary crank arm and a pedal tilt limiter is coupled to the pedal and configured to limit tilt or rotation of the pedal.

A bicycle pedal assembly includes a crank arm, one end of which is pivotally connected to a propulsion axle of a bicycle and another end of which is pivotally connected to a first pivot at one end of an auxiliary crank arm. A pedal is connected to another end of the auxiliary crank arm and a pedal tilt limiter is coupled to the pedal and configured to limit tilt or rotation of the pedal.

An axle assembly for a bicycle includes an axle having an inner wall extending along a length of the axle between a first end and a second end of the axle. The inner wall at least partially defines a first volume and a second volume within the axle. The first volume has a first diameter, and the second volume has a second diameter that is greater than the first diameter. The first volume is closer than the second volume to the first end of the axle. The axle assembly also includes a sensor attached to the inner wall of the axle within the second volume of the axle.