Originally Posted by maddmaxx

Chances are that going in this direction will take a new stem with the right diameter for the flat bar, the flat bar itself and a set of Shimano Flat bar road shifters and flat bar road brake levers.
http://www.jensonusa.com/store/produ...rake+Levr.aspx

http://www.jensonusa.com/store/produ...+Shifters.aspx

Pick your own bars and stem to go with these parts. Add a new set of cables and your probably good to go. This assumes that your present drop bar bike with a 105 rear derailleur has a road front derailleur and road caliper brakes.

Good luck