Abstract: The bicycle handlebar grip assembly is disclosed. The assembly comprises an inner core having a first contact surface and an outer sleeve having an inner surface and a third contact surface on the inner surface. The outer sleeve is configured to enclose at least a major part of the inner core, when the grip assembly is installed to a handle-bar. The inner core and the outer sleeve are separate parts, which are configured to be bonded together by friction force acting between the first contact surface of the inner core and the third contact surface of the outer sleeve, when the grip assembly is installed to a handlebar.