Cannondale Jekyll Carbon – Over Mountain Bike

26er Enduro

At the recent Bike Press Camp event, we talked to Cannondale’s Product Manager Murray Washburn about their updated “Over Mountain” bike, the Jekyll. What is “Over Mountain”? Well, according to Cannondale, it’s the more aggressive end of the All Mountain category. With the addition of the all new Cannondale Trigger appealing to the lower travel All-Mountain crowd, Cannondale was able to make their Jekyll targeted to the more aggressive AM rider. The Over Mountain category also features dual travel and dual geometry to provide a more “tuned” rider to a broader degree of trails and types of riders.

These are the line of bikes that are being raced by such biking celebrities as Mark Weir, Jason Moeshler and Jérôme Clémentz in Enduro races and Super-D events all around the world. At the heart of this incredibly versatile bike is the Fox Dyad shock with its 2 in 1 technology. Murray explains, “The DYAD is really 2 different shocks in one, it’s both a 150mm full travel shock with a more AM-oriented damping and then if you flip the handlebar mounted lever it closes one side of the shock and redirects 100% of the oil through a more XC damping circuit and you end up with a short travel 90mm travel bike with XC damping. The other thing that changes is your sag. The weight distribution changes which means that the bike sits very low and slack (in 150mm full travel mode) providing great stability at high speed and makes the bike very quick and flickable side to side. But when you flip to the elevate mode, the sag is cut by 40% so your bike sits higher, the head angle gets steeper, the nose of your saddle comes down which puts you in a great position for fast trail riding and climbing.”

What this translates into is better climbing. Anyone who’s climbed on a long travel bike knows that as you begin to climb and your weight shifts back, the bike generally begins to sag down. So having the ability to keep the rear end a little bit higher makes the bike a lot more fun to climb on.

If the DYAD shock is the heart of the Jekyll, the BallisTec Carbon frame is the soul. The frame also features ECS-TC (Enhanced Center Stiffness-Torsion Control) System clamped 15mm thru-axles and doubled bearings at the rear dropouts to eliminate flex and play in the links and pivots. All of that means that the bike is incredibly stiff, so when you’re pushing it hard and through turns there’s no flex or give in the front or the back and it reacts as one unit from the front to the back of the bike. Cannondale’s test riders and racers have commented that their ability to pick lines with pinpoint precision and being able to drift the bike with total confidence is because the Jekyll gives you such good feedback as you’re pushing it through those turns.

This particular model shown above is the Jekyll Carbon 1. On the upper 2 Jekyll Carbon models, you’ll see that Cannondale has gone to fox 34 160 forks, a much beefier burlier fork up front. Also updated is the MRP 2x chain guides and burlier tires. Cannondale has really taken a cue from how their Over Mountain racers are setting up their bikes, to figure out the production bike spec. They’ve even introduced a new model called the Jekyll MX, which is based on their smart formed alloy frames that really is a true Enduro race-spec(race out of the box) based on the Cannondale team racers bikes. It runs a Fox 36 up front and WTB Stryker wheelset and is really just geared for that hard-core, aggressive enduro rider. In short, the Jekyll is targeted to be a bike that enables you to climb super efficiently, descend like you would descend on an aggressive long travel bike and really opens up the spread of rideable terrain more than other all mountain bikes can.

From the manufacturer: Cannondale Jekyll

The aggressive middle brother in the OverMountain family, the all-mountain Jekyll is the most versatile bike on the hill. With its 90 to 150mm on-the-fly adjustable travel, geometry that morphs from trail-bike nimble to high-speed stable at the flick of a switch, and an ultra responsive, flex-free chassis, the Jekyll is the perfect bike for Enduro racing and technical all-mountain riding. For technically aggressive all-mountain riders who want to climb fast, but want to descend even faster across the whole range of mountain terrain.

Jekyll is:

  • A super versatile, aggressive all-mountain machine.
  • T rue two-bikes-in one performance that no other all-mountainbike can match.
  • R ock solid feel and ultra precise handling from ECS-TC system.

90mm to 150mm on-the-fly adjustable rear travel. (*some models have 150mm travel X-Fusion P1RL pull shock with platform lockout.)

The same two-shocks-in-one DYAD technology found on the other OverMountain bikes, but with shock stroke, air spring volumes and damping created specifically for the Jekyll.

Attitude Adjust
Switch between modes on the DYAD and the bike’s geometry changes too. Steeper and more nimble in Elevate mode, lower and more stable in Flow mode.

Ballistec Carbon / SmarFormed Alloy
Using fibers developed by the military for ballistic armoring, this high-strength carbon construction process yields a frame that’s lighter than aluminum and pound-forpound stronger than steel. The alloy versions use our ultra sophisticated SmartFormed aluminum construction for a frame that’s light and strong.

ECS-TC System
Clamped, 15mm thru-axles in the shock linkage and swingarm pivot, as well as double bearings at the rear dropouts eliminate flex and provide unmatched center-stiffness for complete control.

S, M, L, X

Available in Jekyll MX, Jekyll Carbon 1, Jekyll Carbon 2, Jekyll 3 and Jekyll 4 trim levels.

Cannondale Jekyll Carbon 1 Specs (Click for more detail)

For more info:

Photo Thumbnails (click to enlarge)

About the author: Gregg Kato

Gregg Kato studied journalism and broadcasting in college while working many different jobs including deejaying, driving a forklift and building web sites (not all at the same time). Kato enjoys riding local Santa Cruz trails. Besides being an avid mountain biker, he is also a motorcycle fanatic. Two wheels, one Passion.

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  • James says:

    This article fails to mention it’s rival the Scott Genius. Which offers 3 travel modes instead of 2. The Scott offers 120mm-180mm travel with a nice remote for complete lock out, travel mode and then full descent.

    The Jekyll isn’t the ONLY bike to have this like this article claims. Just FYI and no I don’t work for Scott.

  • berserk says:

    Specialized also has this feauture if I’m not mistaken.

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