Shimano CUES SL-U4010-9R Shifter - Right 9-Speed Rapidfire Plus Optical Gear Display BLKThis Shimano CUES SL U4010 Rapidfire Plus 9 speed shift lever's refined shape and light operation provide riders with a comfortable easy to use interface. ONLY compatible with Shimano CUES 9 Speed LINKGLIDE rear derailleurs. ONLY compatible with Shimano CUES 9 Speed LINKGLIDE rear derailleurs Rapidfire Plus provides quick lever access and light operation 2 Way Release adds the ability to activate a release shift by pushing with the thumb Easily