Sturmey-Archer SW Drei-Gang-Naben: Unterschied zwischen den Versionen

 

My original 1958 hub's internals had worn, sloping gear-ring and pawl-ring dogs which permitted the pawl ring to slide or "cam" out of engagement (against the spring force) in normal or high gear. If normal gear was selected, this motion slammed the hub into low gear, surely taking a great toll on the gear-ring internal splines (mine were really chewed up) and may be the main cause for low gear pawl chipping. This "camming out" effect may be what Tony Hadland is identifying as the primary cause of trouble with this hub4. Camming out is more prevalent in high gear than normal because a rider typically transmits more torque in a slower/higher gear. As mentioned above in the section on pawls, the slipping of these dogs can be related to problems with incomplete pawl engagement, although even with perfect pawl operation, clumsy shifting can result in partial engagement of these dogs, again leading to slippage.