Shimano Tiagra ST-4600 Shifter Levers offer Quick shifting performance, smooth feel and integrated cable adjuster design: cable tension can be adjusted while riding. Integrated Optical Gear Displayallows for up-to-the-millisecond knowledge of what gear you're in. Light feel and precise control, easy operation and smooth gear shifting operations. Outer shift cable routing. Even small hands can easily manipulate with the included reach adjustment mechanismDetails:Quick shifting 2x10 performanceSmooth feelIntegrated cable adjuster designOptical Gear DisplayLight feel and precise control •Easy operation and smooth gear shiftingOuter shift cable routingIncluded reach adjustment mechanism507g/set