TheShimano Tiagra ST-4600 Double 10 Speed Road STI Levers is another fantastic Shimano shifter, with the latest design features the Tiagra is super comfortable, aero-dynamic and strong in the performance department! The levers themselves are designed in a way to ensure that shifting and braking is easy regardless of your hand position and when combined with the unique rubber material you are always comfortable in any riding condition! Ease of use is another big benefit of the Tiagra ST-4600 shifters, with adjustable reach and light-action release the levers are super easy to control the shifting and braking actions and with the Optical gear display incorporated into the top of the lever you will always be able to tell what gear you are currently in and adjust accordingly to what would be the most optimal gear level for the riding condition! Brilliant ease of use and performance theShimano Tiagra ST-4600 Double 10 Speed Road STI Leversis one of the best budget Road Shifters on the market today! Shimano Tiagra ST-4600 Double 10 Speed Road STI Levers Features 10-speed precision road shifting Super SLR brake levers for use with Super SLR brake callipers Integrated cable adjusters Precision shifting courtesy of Shimano indexing system For use with double gear systems Arced travel on the shift lever always keeps the lever in reach when sweeping shifts across the cassette "