Bar End Shift Levers -these replace the bar end plugs on a drop handlebar and use an internal expander clampPower Ratchet friction control -this allows resistance free lever movement when pulling against the gear mech spring.No Indexed gear positions -these can operate with all brands of gear mech.Trim adjustment of gear mech positions in use is easy,as they use the œold fashioned wayâ of having no pre-set gear positions.