I appreciate your response - did you not like the Goldstrike grips and you needed the end weights? I assume the weights are to lessen vibrations transferred to handlebars.I had the grip puppies and didn't like them. Took them off and replaced with the Goldstrike grips. Very comfortable, but like any add-on grip takes longer to heat up. I used a step bit and drilled out the ends so I could mount the end weights. No issues and love the look.