WOW!! I don't have any vibration yet... I real concern about the split I'm really thinking it was cut by someone I know! trying to keep from going to jail! I have a slice in my tailight and paint by the tailight.. I think this person slid his handlebar on his bike right there... gf said maybe a shopping cart did at the store..show her how that wasn't possible and how the bike could because I park by a curve in front of my house!