{"product_id":"wilier-filante-slr-id2-ultegra-di2-bike","title":"Wilier Filante SLR ID2 Ultegra Di2 Bike","description":"\u003cdiv\u003e\n\u003cp\u003eThe \u003cstrong\u003eWilier Filante SLR ID2 Ultegra Di2 Bike\u003c\/strong\u003e is Wilier Triestina's answer to the question every serious road racer asks sooner or later: how much faster can a bicycle actually be? The Filante SLR — \"filante\" meaning swift and streaking in Italian — has always been the sharp end of Wilier's road lineup, and the ID2 takes that mission further. Built around a Toray carbon monocoque that blends T800, T1100, and M46JB fibers, this is a frame engineered from the fiber level up for the kind of rider who wants everything working together: aerodynamics, fit, and weight, with nothing left on the table.\u003c\/p\u003e\n\u003cp\u003eThe aerodynamic development behind the ID2 is measurable. Wilier worked in the wind tunnel at Silverstone to achieve a 13.6% reduction in drag over the previous generation — a figure that shows up not just on a spreadsheet, but in the sustained watts you can hold in a breakaway or the final kilometers of a race. NACA airfoil tube profiles on the fork and fully internal cable routing eliminate turbulence where it typically accumulates. The new seatpost features a slender, sharp aero cross-section that improves airflow without trading away stiffness or road compliance. Even the Di2 battery has been moved into the bottom bracket box area, so it's accessible without removing the seatpost or disturbing your saddle height — a practical refinement that matters on race day.\u003c\/p\u003e\n\u003cp\u003eThe ID2 platform takes the integration further with a proprietary Wilier F-Bar ID2 handlebar system and 420 possible fitting configurations — seven handlebar spacer combinations, five stem lengths, and two seatpost setback options (0mm and 15mm) give you granular control over your position. That's the difference between a bike that's fast in theory and one that's fast for you specifically. For long race days and sportives alike, the integrated Aerokit adds 1,100ml of on-bike hydration (550ml in the down tube, up to 750ml in the seat tube), keeping bottles out of the wind without adding visual bulk. With tire clearance up to 34mm, the Filante also handles the realities of real-world roads with more composure than its pure race bias might suggest.\u003c\/p\u003e\n\n\n\u003ch3\u003eDesign Benefits\u003c\/h3\u003e\n\u003col class=\"design_benefits\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eVerified wind tunnel aerodynamics:\u003c\/strong\u003e The 13.6% drag reduction over the previous Filante SLR wasn't derived from CFD simulations — it was validated at the Silverstone wind tunnel. NACA airfoil profiles on the fork, a sharp-edged seatpost, and fully internal cable routing all contribute to an aerodynamic package that's genuinely fast across a wide range of riding positions, not just a narrow optimized pose.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree-fiber carbon construction:\u003c\/strong\u003e By combining T800, T1100, and M46JB Toray fibers in the monocoque layup, Wilier's engineers tuned each area of the frame for what it needs to do. T800 delivers stiffness where power transfer demands it, T1100 provides high-modulus structure for the tube profiles, and M46JB contributes responsiveness and vibration damping. The result is an 870g frame that's light without feeling brittle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e420 fit configurations through the ID2 platform:\u003c\/strong\u003e The Wilier F-Bar ID2 cockpit system, combined with five stem lengths, seven spacer combinations, and two seatpost setback options, gives riders genuine fit precision. This matters on a race bike more than most — a position that's even a few millimeters off costs watts and causes fatigue, and the ID2 system eliminates the compromise between aerodynamics and rider-specific geometry.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated hydration without the aero penalty:\u003c\/strong\u003e The Aerokit system provides 1,100ml of on-bike storage — 550ml in the down tube and up to 750ml in the seat tube — with no external bottle cages to disrupt airflow. On longer road races or gran fondos, this is the kind of practical aerodynamics that adds up over hours.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRace-ready build from wheels to drivetrain:\u003c\/strong\u003e Miche KLEOS 50mm carbon clinchers provide genuine aerodynamic benefit on open roads without the handling unpredictability of deeper profiles in crosswinds. Vittoria Corsa Pro tires at 28mm complement the frame's up-to-34mm clearance with race-level suppleness and puncture protection. Shimano Ultegra Di2 handles shifting with electronic precision that doesn't require conscious thought.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eFinal Take\u003c\/h3\u003e\n\u003cp\u003eThe Wilier Filante SLR ID2 is a road race bike that takes aerodynamics seriously without asking you to sacrifice fit or livability to get there. The ID2 platform's 420 configurations mean this bike can be dialed in for a wide range of riders, and the Ultegra Di2 drivetrain delivers race-level performance at a price that makes the complete package feel like a genuine value at $11,500. If you race, ride fast group rides, or simply want a bike that rewards the effort you put in, the Filante SLR ID2 earns its position at the top of Wilier's road lineup.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Wilier","offers":[{"title":"Firelight Red \/ XS","offer_id":45135920889900,"sku":"E666LDO 1F32","price":11500.0,"currency_code":"USD","in_stock":true},{"title":"Firelight Red \/ S","offer_id":45135920824364,"sku":"E666LDO 2F32","price":11500.0,"currency_code":"USD","in_stock":true},{"title":"Firelight Red \/ M","offer_id":45135920791596,"sku":"E666LDO 3F32","price":11500.0,"currency_code":"USD","in_stock":true},{"title":"Firelight Red \/ L","offer_id":45135920758828,"sku":"E666LDO 4F32","price":11500.0,"currency_code":"USD","in_stock":true},{"title":"Firelight Red \/ XL","offer_id":45135920857132,"sku":"E666LDO 5F32","price":11500.0,"currency_code":"USD","in_stock":true},{"title":"Firelight Red \/ XXL","offer_id":45135920922668,"sku":"E666LDO 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