Abstract: A control system for a power assist propulsion system and a user-rideable vehicle. The control system includes memory storing a one or more acceleration profiles. The system also includes a processor communicatively coupled to the memory and to a motorized propulsion subsystem configured to propel the vehicle in concert with, or independently of, a manual propulsion subsystem. The processor controls the motorized propulsion subsystem based on one or the acceleration profiles from the set of acceleration profiles. A communications interface communicatively coupled to the processor share one or more acceleration profiles with a second control system of a second user-rideable vehicle based on input received from a user.

Abstract: A suspension fork assembly includes a steer tube with a first and second end. An adjustable stem is attached to the first end. A set of legs are connected to the second end that house a compressible suspension component. The adjustable stem includes an opening, and the steer tube includes a channel extending through its sidewall. A vehicle with the suspension fork assembly above also includes a frame with a head tube, handlebars connected to the adjustable stem, and a brake line that extends through the adjustable stem opening, between the steer tube and the head tube, into the channel, and out the second end. A method of assembling a steering assembly includes forming a channel in a steer tube, coupling the steer tube second end to a crown, inserting the steer tube into a head tube, and coupling a steer tube first end to an adjustable stem.

Abstract: A power assist propulsion system and a user-rideable vehicle. The power assist propulsion system includes a motorized propulsion subsystem configured to interface with a manual propulsion subsystem. The power assist propulsion system also includes a control system that includes memory storing a set of acceleration profiles and instructions. A processor communicatively coupled to the memory and the motorized propulsion subsystem executes the instructions to generate a customized acceleration profile based on inputs received from a user. The inputs define a number of operating modes, a speed setpoint for each of the number of operating modes, and a power output for each of the number of operating modes. The customized acceleration profile is saved as one of the set of acceleration profiles and the processor controls the motorized propulsion subsystem based on a selected acceleration profile from the set of acceleration profiles.

Abstract: The disclosed principles provide for acceleration systems and related methods for use with power assisted vehicles, such as E-Bikes. Disclosed systems and methods provide for a quick ramp up feature that accelerates the vehicle at a predetermined acceleration rate, but then smoothly integrates into the target cruising speed of the current speed mode by incrementally reducing the rate of acceleration as the vehicle approaches the target cruising speed, thereby reducing or eliminating any jolt or jerky feeling felt during the transition from acceleration to target cruising speed.