Shimano Tiagra ST-4703 3x 10-Speed Shift/Brake Lever Set - Dual Control BLKShimano Tiagra ST 4703 3x10 Speed Shift Brake Lever Set Black. The Shimano Tiagra ST 4700 dual control lever set features Reach Adjust and and an ergonomic form that is compatible with 3x10 speed drivetrains. Shimanos OPTISLICK cables feature a minimal and uniform electrically coated layer that improves cable routing efficiency and provides excellent corrosion resistance SUPER SLR design makes use of a friction reducing mechanism lever and cable that