Originally Posted by
Ballenxj
Very NICE!
A lot of good stuff here folks.
I keep seeing SA 4 speed reference in here, did they make very many of them? I had never heard of them till I joined here.
It's an FW four-speed, wide ratio hub.
Sturmey-Archer Heritage :: History
They're not "rare", but are less common than the AW three-speed. The medium ratio "FM" hub is more uncommon than the FW - mainly for club bikes. The FW also appears as the "FG" hub when combined with a dynohub.