Hope you can help.
Having re-built my 3-Speed Super, I found the gearing quite low and thought I’d put a larger front sprocket on (currently 22T). In emails with Graham Moag, all the new outrigger sprocket stock in the SOC spares scheme are 5/8″ x 3/8″ (including those listed as 3-Speed Super). However my sprockets at 1/2″ x 1/4″ (ish – I haven’t measured exactly).
I looked up in Technicalities and it seems that for a few years at least the 1/2″ x 1/4″ was “standard” on 3-Speed Supers.
Is there any source of supply for these or do I need to consider machining and grafting etc?