Flagship aero performance with pro‑level efficiency
The 2026 Giant Propel Advanced SL 1 delivers the same world‑class aerodynamic platform as the top‑tier SL 0, paired with the latest Shimano Ultegra Di2 groupset for exceptional performance and value. With its Advanced SL‑grade carbon frame, integrated cockpit, and race‑ready wheel system, this model is built for riders who want elite speed, stiffness, and responsiveness without stepping into full Dura‑Ace territory.
Advanced SL‑grade carbon: the lightest Propel chassis
The SL 1 shares the same Advanced SL‑grade composite frame as the flagship SL 0, crafted using continuous‑fibre layup and one‑piece moulding. This construction delivers outstanding stiffness‑to‑weight performance, razor‑sharp handling, and a frame that cuts through the air with minimal drag. The integrated seatmast further reduces weight and enhances aerodynamic flow, giving the bike its unmistakable pro‑tour silhouette.
AeroSystem Shaping for real‑world speed
Every tube profile is sculpted using AeroSystem Shaping Technology, producing truncated‑ellipse shapes optimised for aerodynamic efficiency across a wide range of yaw angles. Whether sprinting, attacking, or holding high‑speed tempo, the Propel Advanced SL 1 maintains stability and efficiency in turbulent, real‑world wind conditions.
Shimano Ultegra Di2: race‑ready electronic precision
Equipped with the latest Shimano Ultegra Di2 12‑speed groupset, the SL 1 delivers crisp, lightning‑fast electronic shifting with the reliability and ergonomics riders expect from Shimano’s pro‑level technology. Paired with powerful hydraulic disc brakes, the drivetrain offers smooth, efficient performance in all conditions — ideal for racing, fast group rides, and long‑distance efforts.
Integrated aero cockpit for seamless control
The Contact SLR Aero integrated cockpit keeps the front end clean, stiff, and aerodynamic. Fully internal cable routing enhances airflow and aesthetics, while the refined ergonomics support both aggressive race positions and long‑ride comfort.
Race‑ready wheels and tyres
The SL 1 rolls on Giant’s high‑performance SLR Aero WheelSystem, engineered for aerodynamic efficiency, lateral stiffness, and responsive handling. Tubeless‑ready rims paired with high‑performance tyres reduce rolling resistance, improve puncture protection, and enhance cornering grip — essential for high‑speed racing and technical descents.
Feature Highlights
- Advanced SL‑grade composite frame and fork
- Integrated seatmast for maximum stiffness and aero efficiency
- AeroSystem Shaping Technology
- Shimano Ultegra Di2 electronic drivetrain
- Shimano hydraulic disc brakes
- Contact SLR Aero integrated cockpit
- Giant SLR Aero WheelSystem (tubeless ready)
- Tyre clearance: up to 32mm