it took time after installing them to get some seat time due to a back surgery. but! after some good miles that would usually have my hand and right forarm numb from the vibration....im happy to say that i just started to experience the tingling after that distance! absolutely love these grips. it wont remove all the vibration. but it was far better than i thought it would be. 5stars from me for sure. and i did have to take my dremel and simply remove the outer lip of plastic sleeve so throttle grip would slide on. i suggest liberal dose of WD-40 and straight push. thanks driven for a wonderful product.