Joined: Jun 2014
Posts: 4,628
Likes: 943
From: Ontario, Canada
Bikes: iele Latina, Miele Suprema, Miele Uno LS, Miele Miele Beta, MMTB, Bianchi Model Unknown, Fiori Venezia, Fiori Napoli, VeloSport Adamas AX
On drop bars with STI levers and the exposed shifter cable/housing I've seen a lot of riders put their map/crib sheet inside a zip-lock bag and then binder clip it to the cables housing. For a handle bar bag almost any bag can be used and a plastic map holder made from a zip-lock bag and velcroed to the bag top.
Cheers