Abstract: An improved bumper two component end cap assembly for pneumatic tube system carriers is disclosed. One component is a wheel-like durable tough relatively hard moldable plastic member which serves the multiple functions of: (a) providing an outer wear surface for engagement with pneumatic tube side walls and control levers; (b) providing a configuration for confining and stabilizing the second relatively softer shock absorbing component; and (c) providing at the hub area relatively strong rigid precise surfaces for detachable rigid fastening connection to the end surfaces of the carrier per se. The second component interacts with the first component as a resilient shock absorber interposed between the first component and the end of the carrier. The second component also has portions extending axially for resilient engagement directly with the stop surfaces at end stations of the pneumatic tube systems.