Abstract: 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.

Abstract: Embodiments of the present invention provide a method and system for controlling an electric vehicle's electric motor output. The method obtains electric vehicle data, user-related data, and receives input from at least one sensor. A controller is utilized to evaluate the electric vehicle data, the user-related data, and the input from the at least one sensor, and automatically tailor an output power curve of an electronic motor to obtain a best performance for the electric vehicle for a given rate of conservation of a battery power.