Abstract: A bicycle handlebar cushioning system includes a mount contoured to be complementary in shape to a set of bicycle handlebars. The mount is elongated and includes elongated break therein for receiving the handlebars such that the mount is frictionally engaged with the bicycle handlebars. A perimeter wall of the mount has an outer surface having an elongated receiving space therein. A cushioning member is removably positioned in the receiving space. The cushioning member comprises a plate removably positioned in the receiving space. A resiliently compressible member is positioned on a top surface of the plate. A height of the resiliently compressible member and the plate is greater than a depth of the receiving space such that the resiliently compressible member extends outwardly from the receiving space.

Abstract: A torsion shaft assembly includes a torque carrying shaft including a driven end configured for receiving torque input to the torque carrying shaft and a driving end configured for outputting torque output from the toque carrying shaft. The torque carrying shaft includes an axial facing damping interface surface axially between the driven end and the driving end. A friction tube is disposed outboard of the torque carrying shaft. The friction tube is connected at a first axial location to be driven by the torque carrying shaft. The friction tube includes an axial facing damping interface surface that abuts the axial facing damping interface surface of the torque carrying shaft, forming a damping interface to provide frictional dampening against angular vibrations occurring as differential angular displacement between the driven end and the driving end of the torque carrying shaft.