Been using these on both bikes for awhile now and they do work. They cut way down on vibration. Another plus for me is that they increase the diameter which seems to be more comfortable. THESE SLIDE OVER YOUR EXISTING GRIPS. Their called Grip Puppies and are available at www.casporttouring.com I believe the cost is about $7.50 a pair. I'm not connected with C.S.T. in any way, just want to pass on something that works.