Join Date: Sep 2008
Location: yreka, ca
Bikes: like 15. my favorite a 1951 schwinn spitfire cruiser. also have a 1959 amf roadmaster, 1962 jch deluxe cruiser among others.
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i have 6 3speeds, all with s.a. hubs, and thats basicly a cable stop. yeah, most time there is a plastic or metal fulcrum insert that fits in the clip, but some work with the end of the shifter cable housing just fine. its function is to hold the cable/housing to the frame and to set a point at which you can meter for your gear adjustment. lets say you have your shifter cable/housing ready to connect to the indicator chain coming from out the hub's axle. i connect the end of the shifter cable to the indicator chain with the shifter in 3rd and then slide the fulcrum clip with the end of the shifter housing in the sleeve, slide it up the chainstay (or however your cable routing is) untill i've taken up the cable slack, but not too tight to as actually shift.
in short, think of it like a newer bikes braze-ons for cable guiding/stops. once tightened to the frame, can be slide for/aft to set the basis for your cable adjustment and tension. the finer gear adjustments can be done via the furrowed sleeve and indicator chain's adjustment "nut".