Shimano Tiagra SL-4600 2-Speed Left Flat Bar Shifter. The Shimano SL-4600 flat bar shifter features Shimanos Super SLR technology Instant and 2-Way Release functionality and an optical gear display for clear visibility.

• The Super SLR design makes use of a friction-reducing mechanism in the lever and cable that improves response and modulation
• Rapidfire Plus technology allows for quick shifting giving riders the ability to downshift three gears in one stroke
• 2-Way Release means that shifts can be released with the pull of the index finger for push of the thumb
• The Optical Gear Display allows you to quickly and easily see what gear you are in
• OT-SP41

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