An ebike comprises a front wheel, a rear wheel, a frame structure supported on the front wheel and the rear wheel, a crank assembly, and a battery assembly. The frame structure includes a down tube defining a down tube axis and being open at its lower end. The crank assembly is rotatable about a crank axis that is spaced rearward from the down tube axis. The battery assembly is slidable into the down tube from the lower end of the down tube along the down tube axis. The battery assembly includes a battery housing protruding from the lower end of the down tube, and a battery cover secured to a lower end of the battery housing and substantially enclosing the lower end of the battery housing. At least a portion of the battery housing may extend below a horizontal plane defined by the crank axis.