The 2025 Giant TCR Advanced SL 1 in Blue Dragonfly is the latest evolution of the bike that revolutionized modern road racing. This specific "Blue Dragonfly" colourway is a stunning Gloss Blue that features "Laser Foil" accents, giving it a kinetic, shimmering appearance that matches its explosive ride quality.
As an "SL" (Super Light) model, this frame features Giant’s signature Integrated Seatpost (ISP). This means the seat tube is a continuous piece of carbon fibre all the way up to the saddle, saving weight and increasing compliance. For 2025, the TCR has been aerodynamically refined with truncated ellipse tubing and a cleaner cockpit, yet it retains its crown as one of the stiffest-to-weight climbing bikes in the professional peloton. It comes ready to race with a full Shimano Ultegra Di2 groupset and—surprisingly for this price point—Giant's top-tier SLR 0 wheelset.
Frameset & Fork
Frame: Advanced SL-Grade Composite, 12x142mm thru-axle, Integrated Seatpost (ISP), Disc.
Fork: Advanced SL-Grade Composite, Full-Composite OverDrive Aero Steerer, 12x100mm thru-axle.
Seatpost: Integrated Design (ISP), -5/+15mm offset options (Requires cutting to size).
Saddle: Giant Fleet SLR, Carbon Rail, ParticleFlow technology.
Cockpit: Giant Contact SLR Handlebar & Contact SLR Aerolight Stem (Internal cable routing).
Colour: Gloss Blue Dragonfly / Laser Foil.
Drivetrain & Brakes
Shifters: Shimano Ultegra Di2 ST-R8170, 2x12-speed.
Front Derailleur: Shimano Ultegra Di2 FD-R8150.
Rear Derailleur: Shimano Ultegra Di2 RD-R8150.
Brake System: Shimano Ultegra Di2 Hydraulic, RT-CL800 Rotors ([F]160mm, [R]140mm).
Crankset: Shimano Ultegra FC-R8100 with Giant Power Pro Power Meter, 36/52T.
Cassette: Shimano Ultegra CS-R8100, 11-34T.
Chain: Shimano CN-M8100.
Wheels & Tires
Wheelset: Giant SLR 0 40 Carbon Disc WheelSystem, Hookless, 22.4mm inner width.
Hubs: Giant Low Friction Hubs, 40t Ratchet Driver, CenterLock.
Spokes: Giant Aero Carbon Spokes.
Tires: CADEX Race GC Tubeless, 700x28c (Effective width), 170 TPI.
Key Highlights
Integrated Seatpost (ISP): This is the defining feature of the "SL" frame. By eliminating the standard seatpost and clamp, Giant saves roughly 40g and improves aerodynamic airflow. Note: This requires the frame to be physically cut to your specific saddle height.
SLR 0 Wheelset Upgrade: Typically, the "SL 1" trim would come with the second-tier SLR 1 wheels. However, this 2025 model is specced with the flagship SLR 0 40 wheels featuring carbon spokes. These are the exact same wheels found on the SL 0 model, offering incredible stiffness and acceleration.
Included Power Meter: The bike comes pre-installed with the Giant Power Pro dual-sided power meter on the Ultegra crankset. This provides accurate wattage data straight out of the box without needing aftermarket upgrades.
OverDrive Aero: The front end is completely hidden from the wind. The brake hoses run through the handlebar, under the stem, and down through the head tube, creating a clean look that saves watts without making the cockpit impossible to adjust.