SHIMANO TOURNEY Right Thumb Shifter 7-speed SL-TX50-7R SHIMANO TOURNEY - Thumb Shifter Plus - Right Shift Lever - 7-speed The SHIMANO TOURNEY SL-TX50-7R is a thumb shifter for mountain bikes that features SHIMANO's OPTICAL GEAR DISPLAY, which tells riders what gear position is selected while riding. TECHNOLOGIES optical_gear_display sis_shimano_index_system