IRD Defiant Wide Compact Road Double Crank Set (46-30t)
$199.99
http://store.somafab.com/irdwicorodoc.html
This is a 46-30t crankset...something that many touring and randonneuring cyclists have played with, but very few maker have mass produced them. This double combo gives you almost as much gearing as a triple, but with less weight and less shifting. If you have a 11-32t in the back, you can spend almost all your time in the big ring and only shift to the 30t on extended climbs.
- 94BCD / 46-30t 7075 aluminum chainrings
- 6061 cold forged aluminum arms
- High polished anodized finish throughout
- JIS square taper BB required (118mm)
http://www.bikeforums.net/touring/975396-those-want-touring-double-crankset.html
http://lovelybike.blogspot.com/2011/04/doubling-down.html