These shimano claris 2400 triple 8 speed road flat bar shifters are for road bikes with flat handlebars theyre mtb style shifters offer fast and accurate gear changes at the touch of a lever with 2 way release which 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 has a clearly visible optical gear display and is compatible with 8 speed drivetrains with triple chainsets