SRAM, LLC

Front forks for bicycles are described herein. An example front fork includes a leg including an upper tube and a lower tube configured in a telescopic arrangement and an air spring in the leg. The air spring includes a pneumatic chamber and a piston in the pneumatic chamber. The piston divides the pneumatic chamber into a positive air chamber and a negative air chamber. The front fork also includes a rebound damper including a rebound damper chamber. The rebound damper chamber is in fluid communication with the positive air chamber through an orifice such that during a rebound event air in the rebound damper chamber flows into the positive air chamber at a metered rate.

A bicycle derailleur includes a base member mountable to a bicycle frame and having first and second laterally spaced mounting portions defining first and second planes, and a space therebetween dimensioned to receive a portion of the bicycle frame. A first mounting arrangement defines a first pivot axis oriented at an acute angle relative to the first and second planes. A second mounting arrangement defines a second pivot axis parallel to the first pivot axis. A first link is pivotally connected to the first mounting arrangement and a second link is pivotally connected to the second mounting arrangement. A moveable member is pivotally connected to the first and second links. A battery may be mounted on the base member and electrically connected with a motor carried by the moveable member.

Front forks for bicycles are described herein. An example front fork includes a leg including an upper tube and a lower tube. The upper tube and the lower tube are configured in a telescopic arrangement. The upper tube and the lower tube define an interior region that is sealed and contains a volume of air in the lower tube. The front fork also includes a valve coupled to the upper tube at or near a top end of the upper tube. A flow path is formed between the volume of air in the lower tube and the valve such that when the valve is opened, pressure in the lower tube is equalized with atmospheric pressure.

Bicycle front forks having features to distribute lubricant are disclosed herein. An example front fork includes a lower tube having a first top end and a first bottom end, the lower tube defining an interior region to contain a volume of oil, a bushing coupled to an inner surface of the lower tube, and an upper tube having a second top end and a second bottom end opposite the second top end, the second bottom end disposed in the lower tube, the upper tube in sliding contact with the bushing, the upper and lower tubes arranged in a telescopic arrangement and moveable between a fully extended and a fully contracted position, the upper tube having a recess, the recess to collect oil when the upper tube is moved into the lower tube and distribute the oil to the bushing when the tubes are moved toward the fully extended position.

A sprocket assembly includes a carrier and a plurality of sprockets. The carrier has a central axis. Each of the sprockets has a different number of teeth and is formed with a central through hole. The carrier extends into the central through hole of each of the sprockets such that the sprockets are disposed on an outer periphery of the carrier and are disposed along the central axis. At least one of the sprockets is coupled to the carrier by a weld that is formed via a solid-state welding technique.

A bicycle with an electric pedal assist motor capable of driving a chainring independent of cranks includes wheel speed sensors and crank cadence sensors. The wheel speed sensors and the crank cadence sensors measure wheel speed and crank cadence, respectively, and provide the measured wheel speed and crank cadence to controller of the bicycle. The controller activates motor overdrive based on the measured wheel speed and/or the measured crank cadence.

A bicycle derailleur includes a base member mountable to a bicycle frame and a cage assembly moveably coupled to the base member. One or both of a motor and/or electrical generator system may be coupled to and moveable with the cage assembly. The motor is operable to move the cage assembly. The electrical generator system includes a generator and a generator drive system.

A sprocket assembly includes a carrier and a plurality of sprockets. The carrier has a central axis. Each of the sprockets has a different number of teeth and is formed with a central through hole. The carrier extends into the central through hole of each of the sprockets such that the sprockets are disposed on an outer periphery of the carrier and are disposed along the central axis. At least one of the sprockets is coupled to the carrier by a weld that is formed via a solid-state welding technique.