The rohloff oem speedhub 50014 32 hole disc quick release internal gear hub has been developed for both pros and performance oriented hobby cyclists who can appreciate it because of its reliability perfect single gear ratios wide range of gears low maintenance and easy operation its weight and efficiency are ideal even for pro racing this hub features a sealed gearbox that ensures reliability and durability even under the toughest conditions the even increments of 136 from gear to gear