I've recently purchased a Simplex SX 630 rear derailleur. Can anyone tell me anything about it ? Also, one thing about it that appears rather different is the fact that where I'd expect a bolt to be to mount it on the frame's hanger there appears to be a sort of a "cap" with hex key head on it. I haven't tried removing this cap yet but I'm wondering if how this whole thing works - it's not immediately obvious how to mount this derailleur.
Also, while it looks like a decent derailleur it's finish is not the fanciest - where does the SX 630 fit in the Simplex line-up ?
John Price
Denver CO