I strongly suggest you buy Shimano or Jagwire cable AND housing. Those Bell sets are galvanized inner wires and, most likely non-lined housing and their only attraction is they are cheap. Spend more and get better ones.

Amazon sells both Shimano and Jagwire cable sets and bulk housing and innner cables:
Amazon.com : Shimano Road Shift Cable and Housing Set (Black) : Bike Shift Cables And Housing : Sports & Outdoors
http://www.amazon.com/Jagwire-Hyper-...hift+cable+kit

Pay the extra couple of bucks.