Friday, August 31, 2012


2013 Cento1SR in Matte Black
Evolution is nothing without an origin.
When we developed the Zero.7, we sought to perfect power transfer, maximizing every watt of a rider’s effort.
In designing our time trial bikes, we learned how to control the flow of air.
Our experience with the Cento1 confirmed that the integrated seatmast is vital for those who demand the best performance from their bike.
We combined these elements from our origins, and then the insight and experience of Wilier Triestina did the rest.
The evolution begins today.

The handling of a Wilier bike is one of its most treasured attributes. We continually search for ways to further improve the solid feel at the front end, which has led to some of the most significant of the Cento1 SR’s enhancements.
We found that a new way of positioning the down tube and top tube with respect to the head tube creates a virtual increase of the head tube’s height, which makes it 14% stiffer in terms of torsional rigidity.
The top tube approaches the head tube at a downward angle while the down tube is angled upwards as it joins the head tube and the Integrated Fork. This junction is traditionally like the point of a triangle, but this new angle and positioning makes it more like a square, which is stiffer. The back of the fork’s brake hole is tucked into the down tube, keeping it clean and protected from the elements. The Integrated Fork design also creates an aerodynamic profile that reduces drag.

Drawing from research implemented in development of our Twin Blade, the Cento1 SR’s fork legs are designed for optimal stability and aerodynamics. Like the proven Kamm truncated tail concept implemented in our time trial models, both the Cento1 SR’s integrated seatmast and fork legs benefit from this structural innovation, thereby attaining a perfect balance of lightweight, aerodynamics and steerability.

Further evolution has been realized through the implementation of our Integrated Adjuster Plate (IAP) cable routing feature, enhancing aerodynamics as well as performance of both electronic and mechanical groups.
The IAP is integrated seamlessly into the Cento1 SR’s down tube to receive cable stops for mechanical groups or wire kits for Shimano Di2 and Campagnolo EPS electronic systems.
Interchangeable based upon a rider’s chosen group, the IAP feature simplifies internal routing of cables, as well as creating a more functionally optimized as well as aesthetic solution.
In combination with a complementary and likewise integrated cable guide at the bottom bracket, IAP ensures unobstructed, noise-free and friction-free cable routing and shifting.
Furthermore, our cable stop option for mechanical groups features integrated barrel adjusters for easy access while riding, as well as additionally enhanced aerodynamics.

Cable routing directed internally within the frame has been an important part of our research and development efforts.
Smooth and reliable operation of the drivetrain and braking systems is an imperative part of determining optimal cable routing; in fact, it is the number one priority.
This led us to develop a feature exclusive to the Cento1 SR: 3D Integrated Cable Routing Plate (3D ICRP). It is a cable guide tucked flushly in the frame beneath the bottom bracket that is designed with varied routing for each of the two cables.
Unlike conventional cable guides, the Cento1 SR’s 3D ICRP is designed to promote differentiated and specific routing for optimal functionality of each of the derailleurs.
The resulting profiling of the 3D ICRP integrated cable guide ensures both a sure feel at the front derailleur as well as rear derailleur performance.
An essential aspect of optimal internal routing is the cable’s frictionless and contact-free movement within each of the frame tubes through which it passes.
Additionally, preserving the optimal arc of rear derailleur cable and housing between the point of exit from the frame at the drive-side chainstay into the rear derailleur itself ensures smooth and “crisp” shifting across the entire cogset.
As with the complementary IAP component, the frame is sculpted at the bottom bracket to receive seamlessly the 3D ICRP cable guide for Shimano Di2, Campagnolo EPS or mechanical systems.
Its minimalist and integrated characteristics assimilate the guide within the frame’s profiling to further enhance aerodynamics over conventional cable guide designs.

We believe that a bicycle worthy of the world’s best professional riders must represent the pinnacle of performance in every aspect. Since introducing our first integrated seatmast design as a feature of our original Cento1 model, we have never strayed from our conviction that it plays a key role in the ideal balance between structural performance, lightweight and comfort.
The Cento1 SR integrated seatmast takes the concept a step further with its Kamm truncated tail design for optimal aerodynamics.

Another of the evolved SR features rooted in the original Cento1 design is our drive-side chainstay. Its shape and lower positioning counteract chain torque, while the non-drive-side chainstay is conversely designed to complement and work in conjunction with the drive-side stay.
The lowered drive-side stay also does away with “chain slap” typical of conventional designs, especially when traversing rough road surfaces.
At the same time, our minimalist and vertically compliant seatstays have been designed to complement the oversized chainstays by dampening vibrations while ensuring torsional and lateral stiffness for optimal power transfer.

The Cento1 SR’s rear triangle conjoins continuous drive and non-drive-side monocoque stays to form an exceptionally stable and strong unified “swingarm” – another unique and renowned Wilier innovation – further elevating the bike’s responsiveness.

Lugless and seamless. No bolts, no external bonding. The SR’s rear dropouts are part and parcel of the integrated rear swingarm design. Even the points of contact, traditionally bonded aluminum sleeves or component parts, are part of the monocoque carbon mold, contributing to overall stability and weight savings.

Our optional derailleur hangers no longer merely represent simple component parts to facilitate standardized installation of a rear derailleur.
Cento1 SR derailleur hangers have assumed a third dimension of functionality, facilitating different systems as well as serving as cable stops.
In addition to these rich new features, our 3D Derailleur Hangers are also much stiffer than conventional rear derailleur hangers.
Easily interchangeable, 3D Derailleur Hangers specifically facilitate either electronic or mechanical drivetrains. For mechanical groupsets, the hanger features a standard cable stop. For electronic groupsets, the specifically designed hanger features a simple opening through which passes the electronic wiring.
In the case of mechanical routing, the cable stop is positioned closer to the rear derailleur itself. This enables the implementation of a shorter length of housing from frame to derailleur while preserving optimal cable arc, maximizing rear derailleur smoothness and performance.
As with the Cento1 SR’s internal cable routing through the down tube, this cable stop at the back end of the drive-side chainstay keeps the rear derailleur shift cable well tensioned and centered within the stay for friction-free and noise-free movement.
The routing of electronic groupset wiring is also optimized, with the wiring’s point of exit positioned well above the drive-side dropout for quick and unencumbered wheel changes.