FrameFelt Aero Road UHC Ultimate + TeXtreme® carbon fiber, MMC w/ InsideOut construction, carbon fiber BB30 & dropouts, 7075 CNC aluminum replaceable rear derailleur hanger, electronic-specific internal cable routing ForkFelt Aero Road UHC Ultimate + TeXtreme® carbon fiber monocoque construction, AeroTaper 1.125" - 1.25" carbon fiber steerer tube w/ integrated crown race, crown, blades & dropouts HEADSETFSA No. 44 integrated, 1.125" - 1.25" sealed superlight cartridge bearing w/ carbon fiber 15mm cone spacer, 2 x 10mm + 1 x 5mm carbon fiber headset spacers, Felt compression device, carbon fiber top cap & aluminum bolt SeatpostFelt VariMount Aero Road flip position UHC carbon fiber, 350mm length Front Derailleur TypeBraze-On Required Bottom Braket TypeFSA Ceramic BB30 w/ 24mm spindle reducers Weight (est.)1.77kg, 3.9lb