Originally Posted by HobartDave
The description says
"The group consists of Bottom Bracket, Caliper Brakes, Cassette, Chain, Crankset, Front Derailleur, Rear Derailleur, and STI Brake/Shift controls with cable kit. "
What else do you need? a seatpost and wheel set?
Saddle, stem, headset (unless it comes with your frame), handle bars, bar tape. repartocorse.com also sells the 105 group (but not a build kit).