Cannondale Jekyll 2 - Review
The Cannondale Jekyll has undergone a number of revisions over the course of its seven year existence, but the latest update is the most significant yet. The bike is still rolling on 27.5” wheels, and retains the ability to switch between two different travel modes (either 165 or 130mm), but the proprietary Fox Dyad pull shock found on the previous models is gone, replaced by a Fox Float X Gemini, the result of another Cannondale / Fox collaboration. The one-sided Lefty fork has also disappeared, at least in its longer travel configuration, and all of the Jekyll models are equipped with more traditional looking suspension.
Frame DetailsThe Jekyll 2's front triangle is constructed from BallisTec carbon, which Cannondale says uses fibers similar to those used for military ballistic armor, combined with resins that are typically used for carbon baseball bats. In other words, it's designed to be stiff, strong, and able to withstand the hard riding the Jekyll is intended for. The swingarm is aluminum, which helps reduce the overall cost of the bike. Looking for all-carbon everywhere? The Jekyll 1 has a full carbon frame, plus carbon wheels, but it'll cost you $1,750 more than the Jekyll 2. The derailleur, brake, and dropper housing are routed inside the front triangle, with the brake and derailleur housing running externally under the bottom bracket. Yes, it would have been nice to see that housing run above the PressFit30 BB, but for what it's worth, I've spent countless hours on bikes with similar routing without any issues. That's not to say that pinching a cable is impossible, it's just that it's very unlikely.
SuspensionCompared to the previous version, the new Jekyll's rear suspension layout looks like it was turned inside out. It's still a link-driven single pivot, but rather than sitting just above the bottom bracket, the shock is now situated between a boomerang-shaped carbon rocker and the upper portion of the downtube. Along with making it possible to run any metric shock on the market, the new orientation leaves just enough room underneath the rocker to squeeze in a regular sized water bottle. The Jekyll's Fox Float X Gemini can be switched between either 165 or 130mm of travel via the handlebar mounted remote. When the remote is depressed, the shock's volume is reduced, which makes it impossible to compress it more than 130mm, a design that's similar to what we've seen Scott use on the Genius. The bike's geometry remains the same, but the decreased travel alters the bike's personality, making it better suited for climbing or more rolling terrain.
GeometryThe previous version of the Jekyll was on the steeper side of the enduro-geometry spectrum, but that's no longer the case, and with its 65° head angle and 470mm reach (for a size large) it won't have any trouble fitting in with the cool kids. 470mm is on the longer side of things (at least for now – more and more large bikes are being released with similar numbers), but the Jekyll's 75° seat angle and short stem should help prevent the cockpit from feeling overly stretched out when climbing. The Jekyll's reach is fairly long, but the chainstays are downright stubby, measuring in at 420mm, an impressively short figure for a bike with 165mm of travel.
|Rear Shock||Fox Float X Performance Elite EVOL w/ Gemini remote-actuated dual mode air spring system,|
|Fork||Fox Float 36 Performance Elite, FIT 4 damper, 170mm|
|Cassette||SRAM XG-1295, 10-50T|
|Crankarms||Truvativ Descendant Carbon Eagle, 30t|
|Bottom Bracket||Cannondale Alloy PressFit30|
|Rear Derailleur||SRAM XO1 Eagle, 12-Speed|
|Chain||SRAM PC-XO1 Eagle|
|Shifter Pods||SRAM XO1 Eagle Trigger|
|Handlebar||Cannondale C1 Carbon Riser 780mm|
|Grips||Cannondale Locking Grips|
|Brakes||SRAM Guide RS|
|Hubs||SRAM 900 Boost|
|Rim||WTB Frequency Team i29|
|Tires||Maxxis Minion DHF 2.5", Minion DHR II 2.4"|
|Seat||Fabric Scoop shallow|
|Seatpost||RaceFace Turbine 150mm dropper|
ClimbingWith two travel options and three compression settings on the rear shock, there are plenty of ways to make the Jekyll feel exactly how you want. Like it as firm as possible? Flip the Float X's blue lever all the way clockwise and push the travel adjust lever down and you'll have rear suspension that barely moves, a setting that's best suited for spinning out the miles on the road to a trailhead. I played with all the different options (a handy way to pass the time on those never-ending climbs), and found that I preferred the shock set to 130mm of travel and in the middle compression setting. This still allowed for enough rear end motion to keep the wheel gripping, but it also minimized any unwanted movement during out of the saddle pedaling.
DescendingCannondale calls the Jekyll's two travel options “Hustle” and “Flow,” but I think “Seek” and “Destroy” has a better ring to it. After all, with 165mm out back and a 170mm Fox 36 up front, the Jekyll is built for more than just 'flowing' down the trail. Forget all of the acronyms and technobabble surrounding the Jekyll – this is a bike that likes to goof off, to drift around tight corners, manual at any chance, and generally cause a ruckus out on the trails. There's plenty of smooth, plush travel to monster truck through the roots and rocks when necessary, with just enough ramp up in the Float X to avoid any harsh bottoming out. The rear suspension has a fairly linear feel to it, but I was content with keeping the bike in its stock configuration, although it is possible to add spacers to increase the amount of end stroke ramp up. I ran the shock with 30% sag, and didn't find any reason to deviate from that number.Even with all of that travel, the Jekyll is still very manageable, and it's easy to see how it would serve well as a race bike – there's a quickness to its handling that makes it easy to keep up the pace even through slower speed or less steep sections of trail. That trait sets it apart from a bike like the Santa Cruz Nomad; while the Nomad needs a steady diet of steep, rough trails to remain happy, the Jekyll is more of an all-rounder - I'd happily take it on longer backcountry epics, or to a multi-day race like the Trans-Provence. There's a dramatic difference in how the two bikes feel on the trail - the Nomad hugs the ground, and prefers to plow straight down the fall line, while the Jekyll sits up higher, and feels more like a beefed up trail bike rather than a mini-DH rig. There are as many opinions about the ideal chainstay length as there are marshmallows in a box of Lucky Charms, but it's important to remember that they're only one part of the geometry equation. In this case, they serve the Jekyll well, and even with the longer front-center I didn't have any trouble feeling balanced on the bike in the long-travel setting. There's plenty of room up front to provide stability in the steeps, while those short chainstays allowed the rear wheel to whip through the corners with a satisfying amount of speed. In the shorter travel setting, which I typically used on smoother, jump-filled trails, I did notice that I needed to be more conscious of my body position in order to remain balanced between the 170mm fork and 130mm shock. That's a pretty big travel difference, and it gives the bike an entirely different feel – there's more of a platform to push into when it comes time to pop off the lip of a jump, but there's also not as big of a cushion when it comes time to touch back down to earth. I actually didn't end up using the shorter travel setting for descending as much as I'd expected – even on trails that weren't that rough, I still preferred the more balanced feel offered by the 'Flow' mode.
• Travel Adjust: Having the ability to switch between two different travel modes on-the-fly is novel, but the execution on Jekyll still isn't entirely perfect. I experimented with various positions for the dropper post lever and travel-selector, but their shapes just don't allow them to integrate seamlessly. I still had to lift my hand slightly off the bar in order to reach the adjuster with my thumb, and it never really became second nature.I can see why Jerome Clementz uses a twist-shifter to switch travel settings on his race bike – that seems like it would be much easier to use, and would free up space for the dropper post remote. Or what about something like a toggle switch that took the place of the inner lockring for the grip? In any case, the system works, but there's room for improvement.
• SRAM Guide RS brakes: I'm pretty picky about my brake lever position and feel, which is one of the reasons I like the pad contact adjust feature found on the Guide RSC and Ultimate models, a feature that's missing on the Jekyll's RS brakes. I'm sure that was done to keep the price down, but I would have gladly given up the carbon cranks or carbon bar for an upgraded set of brakes.
• Fabric Scoop saddle: Seats are about as personal as it gets, but the Scoop's shape fit me well, and it didn't call any unwanted attention to itself, even on all-day rides.
• WTB Frequency rims: Alloy rims may not get the attention that their carbon siblings do, but the Frequency i29 held up for the duration of the test period with only one dent to speak of, caused by landing directly on a sneaky, pointy rock. That impact did pinch flat the tire and squish the rim's sidewall, but once I got home I was able to straighten everything out, and it was almost as good as new.
• RaceFace Turbine dropper: My track record with the Race Face Turbine dropper post is mixed, but this one worked flawlessly, without any change in its performance. There was no slipping, sticking, or sagging, the three most common ailments that can plague dropper posts.
About the Reviewer
Stats: Age: 35 • Height: 5'11" • Inseam: 33" • Weight: 160lb • Industry affiliations / sponsors: None
Twenty-two years deep into a mountain biking addiction that began as a way to escape the suburban sprawl of Connecticut, Mike Kazimer is most at home deep the woods, carving his way down steep, technical trails. The decade he spent as a bike mechanic helped create a solid technical background to draw from when reviewing products, and his current location in the Pacific Northwest allows for easy access to the wettest, muddiest conditions imaginable.