Free $60 Basic Bike Sizing with the purchase of this bike. Click the Tru Fit Logo to check out our proven cycling specific sizing system.CLOSEOUT ITEM!!
(May not be available at all locations, while supplies last)
Wilier's approach to aerodynamic design consists of seeing wind and airflow as allies. The 2012 Twinfoil Tri Bike Frameset respects the nature of airflow and seeks to manage it at every opportunity in order to maximize efficiency by diminishing air turbulence and resistance.
The most visually dramatic aspect of the Twinfoil is its front end, which features another Wilier Triestina exclusive destined to change the way aero bikes are designed: the Twin Fork. This component of the Twinfoil provides a new level of stability in the front end, as well as setting the standard in airflow management. The fork legs act as flow stabilizers to minimize turbulence, while their integration with handlebars diminishes structural deformation and flex.
Chainstays, seatstays and fork legs have a wider profile in order to distance them from turbulent air generated by spinning wheels. Wilier's Aerobrake design likewise widens the structural profile of calipers to remove them from the path of rotational air turbulence. The rear Aerobrake is positioned below chainstays and housed within a carbon shell to hide it entirely from the flow of air.
The rear dropout system enables precise positioning of the rear wheel via four adjustment bolts to establish ideal wheelbase and alignment of cogset in relation to the rear derailleur, including during wheel changes.
The Twinfoil also boasts an integrated seatpost binder assembly housed within the top tube. This expansion assembly securely anchors the airfoil seatpost within the aero seat tube while preserving seamless aerodynamics. Internal routing also minimizes exposure of brake and cable housing.
Wilier's orbital front derailleur adjustment bolt ensures proper positioning of the front derailleur. These features facilitate optimal orientation in relation to chainrings across all prominent drivetrain systems for easier setup and optimal shifting performance.
Wilier's proprietary Twin Fork was born of research and wind tunnel testing which have taught us that aerodynamic design is about much more than a bike's frontal area. It's really all about airflow management: developing a frame and fork capable of directing airflow through and around body parts as well as components and wheels.
The most advanced aerodynamics and fluid dynamics studies have led Wilier to measure turbulence in terms of resistance. That is why they chose to name the two airfoil elements that comprise the fork as 'flow stabilizers', each of which boasts an aerodynamic profile that diminishes air turbulence and directs passing airflow in an efficiently linear trajectory.
Imagine a diver entering the water while attempting to generate as small a ripple effect or splash as possible. Wilier have applied the same concept to frame and fork design, as well as to the combined bike-rider aerodynamic footprint. As a time trialist or triathlete penetrates the wind, the goal is to create as little turbulence as possible.
Another benefit of the Twin Fork is the superior responsiveness and lateral stability it lends to the front end of the bike. By integrating handlebar and fork Wilier can diminish the structural deformation and flex inherent in other, more conventional designs.
Since a race against the clock or bike split can come down to the millisecond, every watt of power generated by an athlete must be efficiently transferred to the bike, especially when the rider stands on the pedals at the start, out of a corner, or on a climb.
The Wilier Triestina Twin Fork represents the most advanced combination of stability and aerodynamics, with extremely low drag and low energy dissipation coefficients.
Wilier designed their Twinfoil brakes to be invisible to the wind.
The front caliper adopts the profile of the fork itself, being assimilated into its aerodynamic footprint.
The rear brake likewise assumes the aerodynamic lines of the frame, positioned below the chainstays at the bottom bracket. It is housed in a carbon cover which encases the caliper and cables, hiding the complete assembly from the wind.
Both calipers are of the V-brake variety for smooth, powerful and modular braking.
In contrast to horizontal dropouts implemented in the design of many time trial and triathlon bikes, like those utilized for track bikes to fine-tune chain tension as well as tire distance from the seat tube, the Twinfoil boasts vertical dropouts.
In working with ProTeam Lampre-ISD, Wilier made the important decision to opt for vertical dropouts like those utilized on standard road bikes for ease of use, dependability and quick wheel changes.
Wilier Triestina still insisted on a design that allowed for fine-tuning of rear wheel position and therefore of the cogset's orientation in relation to the rear derailleur. This enables optimal wheel alignment, aerodynamic positioning and smooth shifting.
Thanks to their innovative solution providing 6mm of adjustability, wheel base and distance from tire to the rear of the truncated seat tube airfoil are customizable. This enables both aerodynamic and bike handling optimizations, as well as making wheel changes fast and simple.
In order to facilitate precise positioning of the front derailleur, Wilier have designed an adjustment bolt accessible on the left side of the frame that enables orbital orientation. This means that not only can the front derailleur be adjusted to accommodate chainrings of various sizes; it can also be rotated and oriented around its own axis.
By adding another element of adjustability, Wilier encourages the seamless use and integration of any type of crankset, chainring or rear derailleur, while promoting the smooth and precise functioning of these key components. This includes the use of oval chainrings.
INTERNAL SEATPOST BINDER ASSEMBLY
Wilier's unique and proprietary seatpost binder assembly is fully integrated and housed within the frame, hiding it completely from the wind for optimal aerodynamics.
- Carbon Fiber Monocoque Aero Frame with intenal cable routing
- Carbon Fiber Twin Fork was designed using the most advanced aerodynamics and fluid dynamics studies. The two airfoil elements diminish air turbulence and direct passing airflow in an efficiently linear trajectory
- Hidden Twinfoil V-Style Aerodynamic Front and Rear Brakes
- Internal Seatpost Binder Assembly for clean airflow
- Vertical Dropouts for ease of use with Horizontal adjustment for optimal wheel alignment, aerodynamic positioning and smooth Shifting
- Frame Weight: 1320g