That's very helpful! Unless, of course, you have a cog with an odd number of teeth. And of course if you have a Sturmey Archer SXF8 hub, your choices are 19, 23, and 25 teeth. Oooo, bummer, man.
All that means is that you need an odd-numbered front chainring, I think.
Last edited by alpacalypse; 02-12-09 at 04:25 PM.
Reason: Never mind, stupid mistake.