100% compatible with all shock absorbers
     a self-alignment of the shock absorber towards the frame so as not to stress the shock absorber shaft when it slides into the main body
     smooth absorption during intense use
     very long life of the shock absorber seals
     less overheating of the shock absorber caused by misalignment of the body
     absorbs the inevitable welding tolerances of the frames.
     the frame cannot be perfectly square with perfect angles.
     it absorbs the misalignments of the ball bearings of the joints that wear and become misaligned with the shock absorber.