Originally had a 2011 black CAAD 10/5 (105 groupset) that developed bottom bracket issues that were eventually addressed via warranty. I had always wanted the white frame, which was unavailable in the 10/5 spec. Given limited availability of white frames, LBS was nice enough to obtain a white 10/3 (ultegra), full bike, which they stripped down and rebuilt with the parts from my 10/5.....hence, the 105 groupset.

Frankly, I saw no benefit to upgrading to Ultegra from 105 to save a few 100 gms. Despite what folks say, a properly tuned 105-5700 shifts just as well (and crisply) as Ultegra 6700. I opted to put my funds toward 3T bars, stem & seatpost.

In spite of being equipped with a "heavy" groupset, the bike as pictured (pedals, cages, computer, light) weighs 17.4 lbs with a 58mm aero wheelset.

Not upgrading to mechanical ultegra leaves the door open for Ultegra Di2, down the road :-)