Pro bike: Jerome Clementz’ Cannondale Jekyll

All-purpose trail bike lights up the enduro circuit

The Cannondale Jekyll all-purpose trail bike has been quite successful on the European enduro circuit, thanks in large part to up-and-coming enduro racer Jerome Clementz. The 28-year-old Frenchman has made a name for himself by winning two Megavalanches, the 2011 Trans-Provance, and the 2012 Mountain of Hell Enduro.

Clementz’ race rig is about as far from the stock as it could be. Prototype parts and clever race-specific modifications abound.

The Jekyll is a single-pivot, full-suspension bike built around a Fox DYAD RT2 rear shock. Designed specifically for Cannondale, this bulky pull shock has separate high- and low-volume air chambers. The high-volume chamber is used in the full, 150mm travel setting. In the low-volume mode the rear suspension stiffens, allowing for approximately 90mm of rear suspension travel. This also has the effect of raising the rear of the bike, steepening the angles and making Jekyll a more capable climber. A handlebar-mounted lever allows the rider to switch between these two positions.

Besides the Jekyll Carbon 1 frame and rear suspension, there are few off-the-shelf components.

Custom Touches

Up front, the bike sports a BlackBox prototype of the RockShox Lyric RC2. Clementz declined to comment on what made this fork special, other than to say that the stanchions feature the friction-fighting DLC surface treatment. Danny Hart and other RockShox-sponsored athletes have been using suspension forks with this slippery coating for several seasons. According to RockShox, the DLC treatment is very good at reducing friction, but it comes up short in terms of longevity. The company is reportedly working on a similar, longer lasting stanchion treatment for production forks.

Clementz uses a pro-only DLC stanchion coating to reduce friction

The drivetrain is an almost production-ready XX1 group. Clementz played a pivotal role in field testing SRAM’s new drivetrain. And while he still opts to run a chainguide for many events, he’s been impressed with XX1’s ability to be run without additional chain retention devices under most riding conditions.

SRAM’s new drivetrain comes at a time of increasingly crowded handlebars—remotes for dropper seatposts and handlebar-mounted levers for suspension adjustment are increasingly common. For many riders, a 1x drivetrain could clean up the clutter. But if Clementz is running a single chainring setup then what’s with the front XO Grip Shifter?

It turns out the twist shifter is used to operate the Jekyll’s rear suspension—an innovative solution for getting rid of yet another lever. “I prefer this setup because I don’t have the take my thumb to operate a remote,” said Clementz. “I find I use the travel adjust much more this way.” Combined this clever use of Grip Shift with a Reverb remote mounted to the underside of the XO Trail brake and Clementz has a very clean system that seldom requires him to loosen his grip on the handlebar.

Clementz runs Mavic Crossmax ST wheels and on the day we caught up with him, was running 2.3in WTB Bronson tires—set up tubeless with NoTube’s sealant—on the front and rear. He prefers to run heavier tires for rough courses but opts to use the Bronson’s for trail riding.

2.3in WTB Bronson tires for everyday trail riding

Complete bike specifications:
Frame Cannondale Jekyll Carbon (2013), size medium
Shock Fox DYAD RT2
Fork Prototype RockShox Lyrik RC2, 170mm
Headset 1.5in Integrated
Stem Truvativ Holzfeller, 50mm
Handlebars Prototype Truvativ carbon riser, 740mm
Tape/grips WTB Moto-X Clamp-on
Front brake SRAM XO Trail, 180mm rotor
Rear brake SRAM XO Trail, 180mm rotor
Front derailleur None
Rear derailleur SRAM XX1
Shift lever SRAM XX1
Cassette SRAM XX1 10-42T
Chain SRAM XX1
Crankset SRAM XX1, 34-tooth chainring, 170mm crankarms
Bottom bracket Cannondale BB30
Pedals Shimano XTR PD-M980 XC
Wheelset Mavic Crossmax ST
Front tire WTB Bronson 26x2.3in
Rear tire WTB Bronson 26x2.3in
Saddle WTB Volt
Seat post RockShox Reverb 
Other accessories Front XO gripshifter to operate the rear suspension
 
Critical measurements: 
Rider's height 5ft 6in / 1.67m
Rider's weight 138lb / 63kg
Total bicycle weight 28lb

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