Quote Originally Posted by pinsonp2 View Post
Axiom makes a rear rack for road bikes that is narrow and takes panniers only. I have considered, but never purchased one. It attaches using the rear wheel skewers and the rear brake bolt. Here is a link: http://www.modernbike.com/itemgroup.asp?IGPK=2126178270

Hope this is useful.

P2
I met a woman at Bike to Work Day last year who rode a Cannondale road bike with one of these racks attached. It looked pretty slick and she said it worked well.