Road bike performance with flat handlebars - these MTB-style STI shifters offer fast and accurate gear changes at the touch of a lever2-Way release allows the upper shift lever to performs the same shift function but swings in either direction allowing it to be released by the thumb or index finger,Clearly visible optical gear display,Shimano New Super SLR brake compatible,Adjustable to work with V-brakes, calliper brakes, cantilever brakes and cable disc brakes,Comes complete with SP41 gear cables,For use with 8-speed drivetrains.