I've had them on for 25,000 miles now- and they work flawlessly. Early on they stopped working and I noticed that the small, two- pronged piece that plugs into the end of the right side hand grip had slipped out, so I glued a small pencil eraser inside of the end cap to keep the piece in place- that was 25,000 miles ago. The grips do get some wear but have remained solid- I wear gloves all of he time. You won't have any problems with the grips wearing out.