What do you know about the sprocket? If you have the chain type..520, 525, 530 Front and rear sprocket size (number of teeth) We can help! Not sure where you are located but there has to be a board member close who will assist with the installation and teach you how this process works. I highly recommend replacing your chain and sprockets at the same time. I would also use a steel rear sprocket, as there is no benifit to using aluminum on the street, other than buying more sprockets.