Wilier Triestina TwinFoil Aero Bike to Debut at 94th Giro d’Italia
Wilier Triestina announces the release of its new ProTour time trial bike, the TwinFoil, to be ridden by Team Lampre Isd at this year’s Giro d’Italia.
The TwinFoil was created to overcome the three fundamental challenges in aero bike design: material deformation, mechanical inefficiency, and – of course – aerodynamic inefficiency. Wind tunnel testing demonstrates that the most significant obstacles in bicycle aerodynamics are a rider’s mass, position and movement. Reducing frontal area is important, though the key to speed is the efficient redirection of airflow around all parts of the bike and rider. This emphasis makes the TwinFoil unique in both appearance and function.
The Aerobrake Difference
Aerobrakes are positioned with maximum clearance from air turbulence generated by spinning wheels while providing optimal braking power and modulation. The rear Aerobrake caliper is positioned beneath the chainstays, tucked behind the bottom bracket cluster and hence “hidden” from the wind.
Fork and Stays Minimal Interference
The same principle of maximum clearance has been applied in the design of Wilier’s proprietary TwinFoil fork, seatstays and chainstays, minimizing air turbulence and drag generated by rotating wheels. In other words, Wilier has sought to eliminate power transfer and airflow inefficiencies inherent in conventional designs.
Wilier’s innovative rear dropout system enables custom and precise positioning of the rear wheel via four adjustment bolts. This unique solution offers mechanics and riders the ability to establish ideal wheelbase. It also facilitates identical positioning of the cogset in relation to the rear derailleur, including during wheel changes, to ensure optimal drivetrain performance.
Integrated Seatpost Binder
The TwinFoil boasts an integrated seatpost binder assembly housed beneath the surface of the top tube. This expansion assembly securely anchors the airfoil seatpost within the aero seat tube while preserving seamless aerodynamics.
Adjustable Front Derailleur Braze-on
Wilier has implemented an orbital front derailleur adjustment bolt, as well as adjustability in the braze-on itself, to ensure proper and exact positioning of the front derailleur. These features facilitate optimal orientation of the front derailleur cage in relation to chainrings across all prominent drivetrain systems for easier setup and enhanced shifting.