Reverse Components R-Shock GripsPerfect grips for your Grom to replace the stock grips off the bike with. These are a smaller diameter than most standard grips, but not too small like some of the other options we offer. These bridge the gap from little kids to teens. Handlebar Grips Bicycle Reverse Components R Shock Lock on 29mm x 130mm Black Silver The R Shock was our first standard grip with our soft rubber compound and also the first grip that received the predicate "shock