Shimano Revoshift SL-RV400-L Twist Shifter - Left 3-Speed Optical Gear DisplayShimano Revoshift SL RV400 L Twist Shifter Left 3 Speed with Optical Gear Display. The Shimano Tourney SL RV400 left twist shifter has a comfortable ergonomic grip design and lighter shifting operation for riders with smaller hands. Its easy to read display and the satisfying "click" of SIS INDEX shifting helps newcomers track gear position. Ergonomic grip design with light shifting operation 25% lighter operation compared to the SL RS35 Optical gear