The Giant Propel Advanced 1 is a high-performance carbon aero road bike engineered for maximum velocity and competitive efficiency.
This 2027 iteration is centered around the Shimano 105 Di2 12-speed electronic groupset, providing lightning-fast, wireless shifting and a wide gear range thanks to its updated 11x36T cassette.
Frameset & Geometry
Frame: Advanced-Grade Composite, 12x142mm thru-axle, Disc, UDH Interface
Fork: Advanced-Grade Composite, full-composite OverDrive Aero steerer, 12x100mm thru-axle, Disc
Handlebar: Giant Contact SL Aero (Lightweight aluminum with aero profiling)
Stem: Giant Contact SL Aero, 10-degree (Integrated cable management)
Seatpost: Giant Vector, Composite, -5/+15mm offset
Saddle: Giant Fleet SL
Colour: Carbon / Stealth Chrome
Drivetrain & Brakes
Shifters: Shimano 105 Di2 ST-R7170, 2x12-Speed (Electronic)
Front Derailleur: Shimano 105 Di2 FD-R7150
Rear Derailleur: Shimano 105 Di2 RD-R7150, 12-Speed
Crankset: Shimano 105, 36/52T
Bottom Bracket: Shimano, press fit (BB86)
Cassette: Shimano 105, 12-speed, 11x36T
Chain: KMC X12L-1
Brakes: Shimano 105 hydraulic, RT-CL700 rotors (160mm front / 140mm rear)
Wheels & Tires
Wheelset: Giant SLR 2 50 Carbon Disc WheelSystem, 50mm depth (Tubeless Ready)
Tires: Giant Gavia Course 0, tubeless, 700x28c (folding)
Max Tire Clearance: 32mm
Key Technologies
AeroSystem Shaping: Truncated ellipse airfoil tube shapes and a unified system design (including specific aero bottle cages) significantly reduce drag at various wind angles.
Shimano 105 Di2: Offers the precision of electronic shifting with a simplified setup, featuring a clutched-style rear derailleur for secure chain management and effortless gear changes under load.
OverDrive Aero: The D-shaped steerer tube and matching spacers provide a sleek, internal cable routing system that is more aerodynamic than traditional setups while remaining easier to adjust than fully integrated cockpits.
Sustained Compliance: The reengineered Vector seatpost and composite fork are designed to absorb road vibrations, which, when paired with the new 32mm tire clearance, makes this one of the most comfortable aero bikes in its class.