Originally Posted by
Marcus_Ti
You want sub-1:1, ideally 20 gear inches (or a bit lower) if you're fully bagged. Which is why triples were/are great things--they give massive range that is actually useful, although with lots of overlap--and doubles just cannot match it....the closest with a road BB and a double you can get is a 48/32 or 46/30 double and either a big Shimano cassette (the 11/34 would probably get you down to 24 gear inches?) or a Road-Link.
Maybe with the increasing popularity of gravel racing, Campy will jump on that bandwagon soon. 46/30 might not be low enough for the OP but it would be a big step in the right direction. Especially since they are only making 11-X cassettes now...