wilier e bike rennrad Wilier Filante SLR ID2 Dura-Ace Di2 Bike

The Wilier Filante SLR ID2 Dura-Ace Di2 is the race bike Wilier sends to the WorldTour — an aero road bike built in Bassano del Grappa, Italy by a company that has been making racing bicycles since 1906. The ID2 generation represents a clean-sheet aerodynamic development: 4.5% less drag than the previous Filante, translating to a claimed 28.8 watts saved at 50km/h with a rider on board. At 7.1 kilograms with the Dura-Ace Di2 build and a full integrated cockpit, this is a serious race machine that doesn’t ask you to choose between aero performance and real-world usability.

The frame is built from three distinct carbon fiber grades — Toray T800, T1100, and M46JB — selected zone by zone to balance responsiveness, light weight, and stiffness. The frame weighs 860 grams. Each carbon type does specific work: T800 for compliance and feel, T1100 for weight reduction in critical sections, M46JB high-modulus fiber where torsional stiffness and lateral rigidity matter most. Tire clearance has been increased to 34mm over the previous model’s 30mm, making the Filante SLR ID2 a more versatile race platform without compromising its aero intent. The Shimano Di2 battery is housed in a custom resin casing above the bottom bracket — accessible in moments without removing the seatpost, and positioned low in the frame for optimal weight distribution.

The cockpit is the F-Bar ID2 — a full carbon integrated bar and stem with 3° of flare and hidden clamp hardware that eliminates exposed fasteners for cleaner aerodynamics and a cleaner appearance. Available in three width combinations (350/380mm, 370/400mm, 390/420mm) paired with stem lengths from 75mm to 120mm, the fit range is genuinely broad without requiring aftermarket substitutions. Shimano Dura-Ace Di2 R9270 runs the drivetrain: 52/36 chainrings, 11-30T cassette, 2x12-speed wireless electronic shifting, and hydraulic disc brakes with a 160mm front rotor and 140mm rear. The Miche Kleos RD 50 carbon wheelset at 1,445g claimed weight carries Vittoria Corsa Pro tires at 700x30mm.

Design Benefits

1. 28.8W Aero Savings at 50km/h: Wilier’s wind tunnel and CFD development produced a 4.5% drag reduction over the previous Filante SLR. In practical terms, that’s 28.8 watts saved at race speed — a meaningful number in a category where most development is measured in fractions of a watt. The tube shaping, internal routing, and integrated cockpit all contribute to that figure.
2. Three-Carbon Layup — T800, T1100, M46JB: Using three distinct Toray carbon fiber grades in a single frame is unusual at any price point. T800 brings compliance and ride feel, T1100 reduces weight without sacrificing layup quality, and M46JB high-modulus fiber provides directional stiffness precisely where power transfer and handling demand it. The 860g frame weight is the result of engineering fiber selection rather than simply layering more carbon.
3. F-Bar ID2 Integrated Cockpit: The full carbon F-Bar ID2 handles fit across a wide range with three handlebar width options and stem lengths from 75mm to 120mm. Hidden clamp hardware keeps the front end aerodynamically clean and visually cohesive with the frame’s paint. The 3° flare gives a natural wrist position in the drops without going full-gravel width.
4. Accessible Di2 Battery Placement: Moving the Di2 battery above the bottom bracket rather than inside the seatpost is a small change with real consequences. You can check battery level and swap it mid-tour in seconds, without tools, without pulling the seatpost — a genuine quality-of-life improvement for riders who use this bike as a training platform as well as a race day weapon.
5. 34mm Tire Clearance: The previous Filante cleared 30mm. The ID2 opens that to 34mm, which means you can run the Vittoria Corsa Pro 30mm tires that ship with the bike and still have room for wider rubber when the terrain calls for it. At 7.1kg with Dura-Ace Di2, this is an aero bike that doesn’t force narrow tires as the price of admission.

Final Take

The Wilier Filante SLR ID2 with Dura-Ace Di2 is a complete WorldTour race package from one of cycling’s oldest and most serious manufacturers. The aerodynamics are genuinely developed rather than claimed, the tri-carbon frame construction is technically sophisticated, and the component specification — Dura-Ace Di2, Miche Kleos RD 50 wheels, Vittoria Corsa Pro tires — matches the frame’s ambition. Available in six colors and six sizes, with a cockpit system that accommodates real-world fit requirements, this is a bike you configure once and ride for years.