Does anyone know the capacity of the Suntour Cyclone Mk II? On another C&V thread, I saw 18T mentioned, but looking through old Trek brochures, they seem to have been used on 50/45/28 chainring setups, a 22T difference.

I have a NOS 1983 model (they were spec on 1983 Treks) that came in a box labeled "Touring". I'm not certain the box is original to this specific FD, however.

Also, as it appears to have been used on cranksets with 52 and 50T big rings, would it be inadvisable to use a 46 as a big ring? And is a half-step granny (ala Trek) the ideal triple setup to use with this particular FD?