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