Mozartt Forte is a chain guide, designed for the double chain ring drivetrain users. Due to its special construction it is compatible with the most of the frames and cranksets on the market. We really care about the pleasure of each ride so silence and strength were our priority. Forte uses a special construction pulley. The insert is made out of a rubber to make it as quiet as possible while the edges, are stiff, to keep the chain in the right place all the time. Pulley spins on the two double sealed bearings so you won’t need a replacement any time soon.