Re:
I made the mistake of recently checking the chainrings on my KTM training bike. It is a triple (that's all their was when I bought it) and I have adjusted the front mech so only the outer and middle chainrings are used. All this time I thought it was 50/34.... nope, 50/39.
As I try to get 400 ish metres of climbing in every ride, I now understand why I have found cold rides a little 'challenging' this winter, so, well done on your 600m.