Yeah, we tried to get all the details in there but there is so much info...! It's in the white paper in the "Cockpit" section. Here's the white paper:
https://www.cannondale.com/...emSix_Whitepaper.pdf Here's what it says:
Quote:
Cockpit
The KNØT SystemBar and Stem is a unique
setup designed specifically for SystemSix. It
provides the integration of a one-piece bar
and stem but retains the fit and adjustability
of a two-piece system. The cockpit, especially
the handlebar, has a profound impact on
the drag of the bicycle system and so it
is an important element of performance.
However, a cockpit is central to fit and
rider comfort on the bike. Herein lies the
advantage of an integrated two-piece setup.
The KNØT SystemBar comes in four widths: 38,
40, 42 and 44cm. Every size bar has a 30mm
flair from the hoods to the end of the drops.
A size 42cm bar measures 40cm at the hoods
and widens 30mm at the end of the drops
(center-to-center). This narrower than standard
hoods position is designed to further help the
rider maximise their speed. Narrower hand
positions reduce frontal area and can help
reduce drag on the rider, while maintaining
width in the drops for stability when needed.
The bar a stem interface permits 8° of pitch
adjustment in the handlebar. The bar tops use an airfoil section with a large truncation.
This is relatively insensitive to pitch angle and
ensures flow remains attached at all positions.
Therefore, drag penalty from personalizing
your bar position is negligible. The bar cross
section has large radi on the trailing edge for
better ergonomics, but without sacrificing on
aerodynamic performance. Utilizing a very
gradual taper on the bar means that flow
remains attached to the end, even when pitched
up or down. With flow attached over the full
chord of the bar, adding a large radius has
negligible effect on the drag. If more comfort
is desired then the bar tops can be wrapped
with a relatively small aerodynamic penalty. Our
wind tunnel testing showed that fully wrapping
the bars, like a traditional round bar, only adds
0.001 m2 drag; < 1W at 40 km/h (~25 mph).
The KNØT stem comes in a range of lengths
to allow riders to dial in their fit: 80, 90, 100,
110 and 120mm. The stem is an open c-section
design that cradles the handlebar and permits
easy assembly. The lower cover then snaps into
place once all the cables are in place. This is
coupled with a split-hinge spacer design that
allows a spacer to be added or removed without
disconnecting hydraulic hoses or shift housing."
End quote.
Cheers,
Damon
Damon Rinard
Engineering Manager,
CSG Road Engineering Department
Cannondale & GT Bicycles
(ex-Cervelo, ex-Trek, ex-Velomax, ex-Kestrel)
