The all new Cervelo R5 Disc is categorised by Cervelo as the 'Worlds Undisputed Fastest Bike!'. Cervelo with their experience gained from the RCA and latest R5 have been able to improve stiffness in all areas, whilst innovating the cockpit design to maket their most aero S Series to date. What you have to remember is Cervelo
are a design company, striving to improve and deliver the best products current technology will allow.
Cervelo S5 Disc 2019 | Stiffness
Cervelo utilised their knowledge and
finite element analysis (FEA) to evaluate different frame shapes in order to
determine their structural efficiency.
This resulted in a 13% increase in head tube stiffness
improving stability and handling. This was achieved via the experienced composite
knowledge of the design engineers improving the frame, fork and Seatpost. In
addition to analysing and altering the carbon layup the new S5 Disc utilises
Cervelo’s 12mm thru axle system, again increasing stability, handling and
control.
Stiffness at the bottom bracket has been increased by 25% to
increase pedal input and support the additional headtube stiffness. Pedalling
stiffness was highlighted by pro tour riders as one of the major benefits of
the previous generation S5 and for 2019 this has again been improved. The bottom
bracket standard BB Bright developed by Cervelo coupled with the knowledge of
Cervelo’s leading engineers and FEA allowed this advancements.
Cervelo S5 Disc 2019 | Usability The new S5 frame moves Cervelo to a disc frame on their most
popular aero bike for the first time. In order to maintain the same weight on the
new frame Cervelo had to first reduce it due to the addition of the external steerer
fork, disc brake mounts and increased stiffness all adding to the weight.
Yet Cervelo still achieved their goal. The 2019 Cervelo S5
is 975g almost 100g lighter with the previous generation at 1067g. Therefore
all the other advantages gained in aerodynamics, stiffness and usability have
been achieved whilst also substantially reducing the frame weight; a true
achievement of engineering.
Cervelo have innovated their frame in order to make internal cable routing to be fully integrated not just adapted. The new S5 Disc has no compromises and has been built with riders and mechanics in mind. The 2019 Cervelo S5 has fully integrated cable routing saving around 40g of drag over a traditional set up. The fork was completely redesigned
around the Cervelo P5X system with a hollow headset bearing assembly and
internal tensing rod increasing the room available for cable routing and thus
the performance of shifting and braking alongside the usability for maintenance
as seen below:
In developing the new fork and cable routing that is both
useable and high performance, Cervelo then had an open book to innovate and
improve the cockpit. It was identified early in development that the best
option on drag and thus performance was a unified bar and stem combination in the new S5.
However this solution was not suitable due to the inability to alter fit; this
led to an improved solution of slicing the uniformed bar and stem into 2
pieces. The final design on the 2019 Cevelo S5 Disc was an aero bar/stem solution with easily assembled cable
paths and a range of adjustability for bike fit as seen below:
At Northern Ride we have a full kit of spacers allowing for adjustment and a complimnetary Bike Fit is provided with all Cervelo's upon collection. If you would like any advice on geometry or fit contact us at [email protected], on 01653 699070 or utilise our Live Chat.
Cervelo S5 Disc 2019 |
Aerodynamic
Cervelo reinvented aero, Cervelo are aero. As seen already the new cockpit
ensures a fully enclose cable path that is both useable and there for the aero
benefit, not just the superior aesthetics Cervelo have achieved. The S5 is innovative and Cervelo
have created solutions for aerodynamic advancements.
Cervelo were an early adopter of computational fluid
dynamics (CFD) to analyse and improve aerodynamics of carbon frames. In a CFD approach
complex phenomena are simulated by estimating conditions in small volumes
called cells; these are then grouped in a larger area called a mesh. Using this
technology to analyse frame design and geometry has enabled Cervelo over the
years to gain data and stay ahead of other manufacturers.
The aerodynamic savings is 42 grams of drag—equivalent to
5.5 watts to the rider (compared with a standard Gen II S5 equipped with AB04
handlebar).
The
aerodynamic advancements were then put to the test in the wind tunnel. Cervelo
have for years created a benchmark by improving their frames based on their
previous models, yet Cervelo also buy and test the competition; further
enabling them to be the market leaders.
