Selling my top-spec Cannondale Synapse carbon road bike with electronic top-tier Sram Red eTap groupset, disc brakes, and Mavic Cosmic SL carbon wheels - all in very good condition. It is an endurance bike recognized as one of the best by major bike reviewers in 2018-2020. The bike weights around 8 kg. It's size 56, fits riders 177-185 cm according to Cannondale's size guide. Cosmetic condition is good: some components are pristine while the frame, bars and wheels do show signs of normal use. I've serviced the bike myself so I know it's in great mechanical condition. In short, the configuration is:
Groupset (shifters, rear and front derailleurs, brake calipers) - electronic Sram Red eTap, 2x11 speeds
Carbon wheels - Mavic Cosmic SL C Disc, 40mm height. All bearings were replaced last year.
Crankset - Quarq Quarq Prime Carbon, 50x34T, 172.5mm.
Cassette - Shimano R7000, 11sp, 11-32t
Chain - KMC X11 EPT (installed in April)
Tyres - Continental Grand Prix 4 Season, 28mm
Saddle - Fabric Scoop Shallow Race, Ti Rail. Still new as I've used another saddle.
Original bike spec and more description: https://www.99bikes.co.uk/bikes/road-bikes/cannondale-synapse-disc-red-etap--2019-road-bike__860
However note that few components (like wheels, for example) were upgraded since the original spec.