Full Aerodynamics With Shimanos 105 Shifting. The Giant Propel takes the aero dynamic brilliance of the Trinity & the road race attitude of the TCR & melds them together to complete the ultimate in race cycling. The Composite frame features the Giant oversized bottom bracket housing & overdrive steerer to help you put the power down & stay in control. The Aero System technology saves 12-36 seconds over 40km compared to competitors making this a machine to be reckoned with. Utra reliable 11 speed 105 shifting. P-SLR 1 rims gives aerodynamic properties to the wheelset. Internal cabling completes a clean look. The advanced composite carbon frame provides astonishing torsional strength & generates full power delivery for a maximum speed. Shimanos 105 places you in safe hands, giving the right gear for the right situation. Description by Mark Craddock, Rutland Cycling Web Team.