Links for the Axiom Road racks:
http://www.axiomgear.com/products/ge...iner-road-dlx/
http://www.axiomgear.com/products/ge...eamliner-road/

The DLX is the narrower of the two. The key features are the single top mount that goes to the bike's brake bridge and the extended lower mounts that use the skewer and, just as importantly, hold the rack farther back to help avoid heelstrike against panniers. Touring bikes have longer chainstays partly to help avoid heelstrike.