I converted my Schwinn LeTour over to bar ends. I used Shimano Ultegra indexed. So I changed the rear der. to a Tiagra. I left the original Altus on the front because that is friction anyway. It has been a tremendous improvement over friction. Though I don't mind friction (better mention that before I get hammered by the old school guys) I can change the rear to work as friction also. I have maybe $80.00 in the conversion.