Thanks for the info - I wasn't aware you could fit two single cogs (and presumably some sort of spacer) onto a fixed hub.
I'm talking about a double-fixed hub, i.e. one with threads on both sides. Ideally one with a 45mm default chainline, then you move it sideways 2.5mm to give chainlines of 42.5 and 47.5, which line up with double chainrings.
I'm talking about a double-fixed hub, i.e. one with threads on both sides. Ideally one with a 45mm default chainline, then you move it sideways 2.5mm to give chainlines of 42.5 and 47.5, which line up with double chainrings.