Here's my Titanflex build with single chainring
(completed this past weekend May 31st, but no long ride report yet given my 10yr old visiting nephew gave me the Flu for the last week)
Dropped nearly half a pound (0.46 lbs) by converting from 2012 SRAM Red (50/34 Red compact crank, TT shifters, Red Derailluers)
to SRAM XX (10spd) Rear derailluer, 11/36 cassette, Wolf Tooth Components wide/narrow 44T chainring. (will use SRAM 46T CX1 Chainring when available to gain back some top end). SRAM 10 speed road shifters and 10 speed mountain bike parts are fully compatible (both use exact actuation)
44T chainring and 36T cassette yields a climbing ratio of 1.22 vs a ratio of 1.21 with the prior compact set up of 34T chainring and 28T cassette cog.
44T chainring and 11T cassette yeilds a top speed ratio of 4.00 vs a ratio of 4.55 with the prior compact set up of 50T chainring and 11T cassette cog
When I switch to 46T CX1 Chainring when available:
46T chainring and 36T cassette cog yeilds a climbing ratio of 1.28 (which is more than enough to climb the steep hills around Bloomington, Indiana easily)
46T chainring and 11T cassette cog yeilds a top speed ratio of 4.18 (just 8% less top end than compact 50/11 gearing so should be good for just about everything)
The XX Cassette Gear spacing is 11,12,14,16,18,21,24,28,32,36 which works great for hilly terrain (Bloomington, Indiana) with constant shifting required.
I hate compact crank's drop from 50t to 34t which often necessitates an upshift or two in the rear derailluer to maintain steady cadence (I'm used to the wider cassette spacing given my mountain bike background) and I hate front derailluers even more!
Bye Bye Front Derailluer, Hello 0.46 pound weight reduction and perfect shifting!
(total bike size XL as pictured below with pedals, computer and bottle holder is 18.15lbs)
pics