Blue Competition knew they were onto something with their new AC1SL which is why they decided to make a more affordable aero race bike that everyone could enjoy. The new AC1 has the same proven race geometry and monocoque frame with Super Flow Tube Technology, but Blue made it more affordable by adding both SRAM Force and Shimano Ultegra groupo options, as well as using a T700 carbon for the frame and fork. And this bike is as aero as they come...from the internal cable routing with sleeves to the new aerodynamic seat post clamp. Blue left no stone unturned.Geometry: XS SM MD ML LG XL (A) Eff. Top Tube Length C-C (cm) 50.5 52.5 54 56 58 59 (B) Seat Tube Length C-T (cm) 46 46 49 52 55 58 (C) Head Tube Length (cm) 10 12.5 14.5 16 17.5 19.5 (D) Head Tube Angle (degrees) 71.5 71.5 72 72.5 72.5 72.5 (E) Seat Tube Angle (degrees) 74.5 74 73.5 73 72.5 72.5 (F) Fork Rake (cm) 4.5 4.5 4.5 4.5 4.5 4.5 (G) Chain Stay Length (cm) 40.5 40.5 40.5 40.5 40.5 40.5 (H) Bottom Brackett Drop (cm) 7 7 7 7 7 7 (I) Wheelbase (cm) 95.3 97.2 97.8 98.9 100.4 102.4 (J) Seat Tube Diameter (cm) Aero shape seat tube and clamp (K) Outside Seat Tube Diameter (cm) Aerus C4 Pro full carbon aero seat post (L) Standover Height (cm) 72.3 73.4 75.8 78 80.1 82.5 Build Options: SRAM Red SRAM Force Shimano Dura-Ace 7900 Shimano Ultegra 6700 SRAM Red WB SRAM Force WB Wheels HED Jet 40 Clincher Pair American Classic 420 bladed HED Jet 40 Clincher Pair American Classic 420 bladed HED Jet 40 Clincher Pair American Classic 420 bladed Tires Vittoria Diamente Pro Vittoria Rubino Pro Vittoria Diamente Pro Vittoria Rubino Pro Vittoria Diamente Pro Vittoria Rubino Pro Shifters Red Double Tap Force Double Tap Dura-Ace Ultegra Red Double Tap Force Double Tap Front Derailleur Red Braze-On Force Braze-On Dura-Ace Braze-On Ultegra Braze-On Red Braze-On Force Braze-On Rear Derailleur Red Force Dura-Ace Ultegra Red Force Crankset Red 53/39 BB30 Force 53/39 BB30 Dura-Ace 53/39 Ultegra 53/39 Red 50/34 BB30 Force 50/34 BB30 Cassette 1090 11-23 1070 12-25 Dura-Ace 11-23 Ultegra 12-25 1090 11-23 1070 12-25 Brakes Red Force Dura-Ace Ultegra Red Force Chain Wippermann 10S1 Wippermann 10S8 Wippermann 10S1 Wippermann 10S8 Wippermann 10S1 Wippermann 10S8 Saddle Selle Italia SLR XP Flow Selle Italia Filante Flow Selle Italia SL Flow Selle Italia Filante Flow Selle Italia Lady Gel Flow Selle Italia Lady Gel Flow Seatpost Aerus C4 Aero Carbon Pro Aerus C4 Aero Carbon Pro Aerus C4 Aero Carbon Pro Aerus C4 Aero Carbon Pro Aerus C4 Aero Carbon Pro Aerus C4 Aero Carbon Pro Handlebars Aerus C4 Carbon Wing, 31.8 Aerus C4 Carbon Pro, 31.8 Aerus C4 Carbon Wing, 31.8 Aerus C4 Carbon Pro, 31.8 Aerus C4 Carbon Wing, 31.8 Aerus C4 Carbon Pro, 31.8 Stem Aerus 7050 Alloy 31.8 Aerus 2014 Alloy 31.8 Aerus 7050 Alloy 31.8 Aerus 2014 Alloy 31.8 Aerus 7050 Alloy 31.8 Aerus 2014 Alloy 31.8 Headset FSA Orbit IS Carbon FSA Orbit IS FSA Orbit IS Carbon FSA Orbit IS Carbon FSA Orbit IS Carbon FSA Orbit IS Carbon