Our KERN platform is the essence of mountain biking. They will give you a real pedaling efficiency in climbs and will give you pleasure and adrenaline on the descent whether in 120 (KERN SL), 140 (KERN) or 160 (KERN LT).
« ALLOY » 6069
Strength (inset 1): 6069 is the most difficult alloy to break and with the best fatigue strength.
– Elastic limit (maximum force before permanent deformation)
= +25% (6061) and +15% (7005)
– Fatigue (maximum force before breaking)
= +54% (6061) and +28% (7005)
Weight: Comfort ratio (inset 2):
Alloy 6069 offers the best density/elasticity ratio.
– Density: 1% higher than 6061 and 2.2% lower than 7005
– Elastic modulus: 4.4% lower than 6061 and 9% lower than 7005
E.T EDGE TUBING
By extending the edges from the top tube down through the seat stays and to the dropouts, we’ve improved frame dynamics:
– by reducing the effect of torque when pedalling for better efficiency of the rear wheel.
– by optimising its vertical flexibility
CONIC EDGE TUBE
The tapered shape of the head tube allows for a stiffer front triangle, meaning a more-precise ride.
A 100% integrated design that uses the edges from our E.T. concept.
Lateral opening for a clearer view of SAG.
We recommend the use of a shock absorber under the weight of the pilot (SAG) of 35%, so 15mm for the KERN SL, 20mm for the KERN and 22mm for the KERN LT.
In order to meet the expectations of the most demanding of riders, we have developed a new HM Toray® T800 carbon chain stay. The monobloc manufacturing associated with our specific lay-up contributes greater rigidity necessary for large bermed corners and swift accelerations.
KINEMATIC V.R / L.R
In collaboration with Antidote Solutions engineering consultants, we’ve developed new kinematics for our KERN range, based around 2 concepts: V.R. (Virtual Rotation) and L.R. (Leverage Ratio).
V.R. / Virtual Rotation: a kinematic principle of virtual pivot points.
Shape of the ICR curve:
The curve of the pivot points moves back along the length of the frame as travel increases, which is ideal for suspension balance.
At the start of travel, the front pivot points make it easier to sit into the slope and avoid ‘catapult’ effect when hitting jumps.
KINEMATIC V.R / L.R
L.R. / Leverage Ratio: relationship between rear-wheel travel and shock compression. The ratio constantly changes throughout the wheel’s travel range. We focused and worked on the following aspects for our Kern range:
Shape of the LR curve :
Progressive : to maintain stability throughout the travel range and to avoid bottoming out. Parabolic: to quickly lower the ratio around SAG and thereby get better support from the suspension. The relationship between suspension and SAG is important in order to avoid stability problems.
0 to 60 mm : High ratios (between 2.9 and 2.6) provide comfortable and relatively soft suspension. The progressive shape makes it easy to reach the SAG value (a ratio of around 2.65) and facilitates negative travel, which is important for the bike to move smoothly over broken ground.
60 to 120 mm : (ratios between 2.6 and 2.4) the curve is still progressive, but ratio reduction is slowed; suspension is firmer and gives better grip.
120 to 160mm : (ratios between 2.4 and 2.38) the curve bottoms out at 150 mm travel (2.37). The progressive shift in ratios from 2.9 to 2.37 stops the shock bottoming out at the end of travel. At the very end of travel, the force exerted on a pneumatic spring (air shock) increases quicker than the travel (Ramping), which means maximum travel is never reached. This is why, to compensate for the ultra stiffness of the air shock, we’ve slightly lifted the curve again at the end of travel (from 2.37 to 2.40).