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Setting a milestone

Back in 2010, SCOTT introduced the Foil featuring the novel F01 Aero Technology. As an aerodynamically optimized road bike, the Foil featured truncated airfoils which are now used on most aero bikes today. SCOTT was one of the first bike manufacturers to file a patent for this specific airfoil shape. With the truncated airfoil, SCOTT’s Aerodynamic Science unit intended to work around the drawbacks of UCI-regulations that give a limit of a 3:1 airfoil ratio. As a consequence of this regulation, aerodynamic tube shapes, with their traditional tear drop profile often lacked stiffness or were heavy resulting from additional material required to improve stiffness. The truncation of the airfoil solves this issue. While the aerodynamic performance of the airfoil is comparable to a traditional tear drop airfoil, stiffness and weight characteristics are substantially improved. The Foil is an aero bike to the core, maintaining impressively low weight and high stiffness values.

Win every ride !

Since its introduction back in 2010, heaps of races have been won on the Foil. To date (April 2015), the Foil holds 15 Grand Tour stage wins and three Classics. The Foil has been first across the finish line in 134 races at the highest level of cycling. The new Foil has been designed to win every ride! Regardless of whether you’re competing, chasing a virtual segment or taking on your riding buddies in an imaginary sprint finale, the Foil is the ultimate machine for those striving to win.


Speed update

The new Foil features the same lightweight frame characteristics as its predecessor. With a frame weight of 945g and a fork weight of 335g (size Medium, including small parts ) the new Foil is one of the lightest Aero Bikes on the market. Our World Tour riders count every gram. 6.8 kilograms is a magic number for them and despite its aerodynamic and stiff nature, it’s actually not a challenge to build the complete bike below this regulatory threshold. It took no time for the first Foil to gain a reputation for being extremely stiff and responsive with regards to power transfer and handling. In favor of our Pro riders and the customer base that prefers a stiff and responsive bike, the new Foil exhibits even higher stiffness values than its predecessor.

The frame aerodynamics of the bike have been reworked as a whole: all the vertical sections of the frame have been optimized independently and in conjunction with each other, component integration has been lifted to a new level and the bike features a fully integrated cockpit that saves precious watts. Aside from the visible design enhancements with regards to aerodynamics and integration, the riding comfort of the new Foil has been elevated noticeably. The new Foil keeps the much appreciated characteristics of the original model but adds novel and innovative solutions to make it faster as a whole: It’s a Speed Update!


Aerodynamic science

The vertical frame sections of the Foil which include the fork, headtube, seattube, seatstays and seatpost have been optimized aerodynamically both independently and in conjunction with each other. CFD analysis shows that at low yaw angles the front area of the frame is responsible for up to 50% of total drag. The headtube and the front-end of the bike have consequently been of major importance when frame aerodynamics were optimized.

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Seatstays and fork blades

The new Foil features a Shimano Direct Mount rear brake which is fitted below the bottom bracket. The lowered seatstays and the removal of the caliper brake bridge between the seatstays decreases the gap behind the seat tube and the seatstays avoiding air stagnation and consequently drag. In addition, the seatstay attachment to the downtube has been carefully designed with regard to aerodynamics in order to improve the airflow around this area of the seatstays.

The airflow that meets the fork blades and seatstays has been disturbed by the spinning wheels and in the case of the seatstays as well by the moving rider’s leg. In-depth CFD analysis has shown that at low yaw angles the airflow is pushed away from the fork blades and seatstays if they exhibit a slight outward orientation. The fork blades and seatstays of the new Foil have been optimized in that regard resulting in an advantage at yaw angles between 3 and 5 degrees.


F01 technology

In the process of developing the first edition of the Foil, SCOTT patented a new airfoil design and introduced the F01 Technology. An airfoil consists of three sections that can be modified according to airflow conditions. F01 Technology defines the boundary conditions according to which the airfoil is modified. In theory, an infinite number of airfoils can be designed based on this concept. The following section explains the three crucial areas of an airfoil.


aerodynamic test results

The final wind tunnel test was carried out applying the testing protocols of the renowned German TOUR Magazine. A dummy with moving legs simulates real world riding conditions and ensures high testing reproducibility. The measurements were con- ducted at 45 km/h air and wheel speed in a full sweep covering yaw angles from –20° to +20° with the leg dummy pedaling at 90 rpm. The test revealed that the new Foil saves 6 Watts on average over the tested yaw spectrum compared to its predecessor. This equals a gain of 27 seconds over 40 kilometers with an average speed of 45kph.

Drag Power [W] vs. Yaw Angle [°] at vapp = 45 km/h (Bike with moving legs / Shimano Dura Ace Di2 / Zipp 404 / 1 Bottle on Downtube)

Integration


Syncros aero RR1.0 cockpit

The all-new, fully integrated RR1.0 cockpit from Syncros was developed in conjunction with the new Foil and adds to the aerodynamic excellence of this bike. Its superior aerodynamic properties stem from its aero-optimized shape which includes an F01 profile on the horizontal part of the bar along with state-of-the-art integration possibilities. Full integration of brake cables, mechanical and electronic shifting cables and Shimano’s Di2 junction box ensure a smooth transition between the cockpit and the frame, a clean look and aerodynamic cable routing. Despite the aerodynamic bar design which even features a recess to ensure a smooth transition between the bar tape and the grippy top area of the bar where no bar tape is needed, the Syncros Aero RR1.0 Cockpit has been designed following ergonomic principles. Another major advantage of this integrated carbon cockpit is the ability to specifically tailor the performance of the carbon structure on one piece. Towards the connection with the bar, the stem flares out into a triangulated section which offers a larger contact point for the bar to maximize rigidity and resist twisting.

Removing the junction between stem and bar, in addition, increases the stiffness of the cockpit to a level that is impossible to achieve for a conventional setup. At the same time, the carbon cockpit weighs in at an impressively low 395g (42cm bar width/110mm stem length). While the bar angle is predetermined due to the one-piece cockpit construction, the engineering team has conducted an in-depth analysis of handle bar positions in order to create a neutral position. Two different mount options make sure Garmin head units can be perfectly positioned in front of the cockpit and the rider has his data easily visible at all times. The Syncros Aero RR1.0 Cockpit is also available as an aftermarket piece. Thanks to a reducer shim it is compatible with both 1 1/4” and 1 1/8” steerers. Specific Aero Spacers have been designed for the new Foil in order to achieve a smooth transition between the stem and the frame. The Aero Spacers are available in 2mm, 5mm, 10mm and 20mm in order to fine tune the stack of the cockpit.

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Syncros aero rr1.0 cockpit



Construction

Along with its aerodynamic properties, the all new FOIL was constructed to maintain its already stiff nature, but also to provide for more comfort while staying lightweight.

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TECH AND FACT REPORT

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2017 foil range

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