This superb model is non-directional & will work with both Campagnolo & SRAM 10-speed derailleur systems. in addition, it weighs only 269g, so you won't have to worry about any excess weight holding you back. World-class professional racers have proved that KMC chains provide the right DNA to help you become a champion. BX10NB114 Silver: Original Part Number KMC100HS BX10GG114 Grey: Original Part Number KMC1073