I recommend a used 6500 Ultegra Triple. Plenty available, standard style + quality replacement chainrings are still available from Stronglight and TA. https://www.bing.com/search?pglt=297...EESS&PC=SCOOBE You'll need a Shimano Octalink BB still available new from under $20 and up for higher tier versions. https://www.performancebike.com/shim...69365?v=468059