Compared to the Pro4, the Pro5 hub features a new zero drag labyrinth seal and an improved ratchet and pawl system, with new springs. Both greatly reduce drag as well as increase durability and load capacity . Featuring an offset 6 pawl freehub design, where 3 pawls are engaged at any time and an increased POE (now 108), Hope was able to achieve the right balance between speed of pick-up, load capacity, drag & durability. In real-world terms gives a speedy feel on the trail while keeping crank movement to an acceptable level without compromising the free running of the hub or its reliability. 6-bolt/44mm BCD International Standard disc mounting dimensions. HG 8-11sp: Not compatible with HG 11sp road cassettes