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JEKYLL FEATURES

The Jekyll pairs one of two lightweight aluminum swingarms with an 
all-new welded aluminum front triangle. A threaded, pivoting collar is
used as the attachment point for the rear shock. By threading the shock
absorber fore or aft within the collar, a rider can quickly change the
bike’s geometry and handling characteristics. Positioning the shock
absorber farther forward, for example, lowers the bottom bracket height
and slackens the head and seat tube angles, making the bike perfect 
for high speed descending. Threading the shock farther back raises the
bottom bracket and steepens the angles for quicker handling and more
cross-country oriented riding. The shock is also fully adjustable to
positions between the fully forward and fully aft limits, offering an
incredible range of adjustability and ride tuning. The rear wheel 
travel on the Jekyll is a full 120mm, regardless of where the shock 
is positioned in the collar. Some Jekyll models use Fox rear shocks
equipped with compression adjusters which can be used to stiffen 
the rear suspension for a more race-oriented ride.

COMPONENT COMPATIBILITY AND PRECAUTIONS FOR ALL JEKYLL
MODELS

PIVOTING SHOCK MOUNT COLLAR

The Jekyll uses a pivoting collar above the bottom bracket to secure the
rear shock to the frame’s front triangle. The two bolts which secure the
collar to the frame should be kept tight to 150 In-Lbs (17 Nm). If these
bolts are removed, you should apply one drop of Loctite 242 (blue) to 
the bolt threads inside the collar before reinstalling and tightening the
attaching bolts. Make sure not to get any Loctite through the collar onto
the shock adjustment threads, nor any on the frame’s pivot bushings.

The frame bushings on which the collar bolts pivot should never be
greased or oiled. They are Teflon

®

coated and need no lubrication.

Additionally, some lubricants may deteriorate or destroy the coating.

Should your pivot bushings be damaged or wear out, they can 
be replaced by your local Authorized Cannondale Retailer.

Summary of Contents for Jekyll

Page 1: ...not receive both the Cannondale Bicycle Owner s Manual and the HeadShok owner s manual please download and print one from the Cannondale website Tech Center or call our customer service line at 1 800...

Page 2: ...e the shock is positioned in the collar Some Jekyll models use Fox rear shocks equipped with compression adjusters which can be used to stiffen the rear suspension for a more race oriented ride COMPON...

Page 3: ...hok headset cups only FRONT DERAILLEUR All Jekylls require a standard bottom pull type front derailleur with a 31 8mm clamp diameter Because the front derailleur mounts to the rear swingarm and has a...

Page 4: ...from chain slap ALTERNATIVE BRAKES Hydraulic and disc brakes are a popular upgrade on many suspension bicycles When selecting a hydraulic brake system for your Jekyll choose one that mounts to the fr...

Page 5: ...hex wrench Once the bolt is removed pivot the swingarm down and the rear of the shock up so that the two don t touch 3 Spin the shock body clockwise when viewed from the front of the bike within the p...

Page 6: ...ost aft position adjust the front derailleur so that the derailleur cage is approximately 1mm above the large chainring when there is no weight on the bike see Fig 2 The rear end of the derailleur cag...

Page 7: ...7 1mm Fig 1 Fig 2 Note Threads...

Page 8: ...should never be used These gear combinations called cross chaining place undue stress on the chain chainrings derailleurs and rear cogs Duplicate or similar gear ratios can be achieved in other combin...

Page 9: ...tside of the Lefty leg and behind to the disc brake See Fig 4 Note that the zip tie loops need to be loose enough to allow the hydraulic brake line to slide freely up and down If equipped with a Fatty...

Page 10: ...DERAILLEUR Run cable housing from the front shifter to the housing stop on the right side of the downtube Run exposed cable to the housing stop a the lower end of the downtube Run cable housing appro...

Page 11: ...the outside of the Lefty leg and behind to the disc brake See Fig 4 If equipped with a Fatty Ultra or Super Fatty fork the tubing from the front brake lever should be directed behind the shock boot an...

Page 12: ...towards the front derailleur REAR DERAILLEUR Run cable housing from the rear shifter to the lower slot in the double housing stop on the left side of the downtube Insert the included plastic cable sto...

Page 13: ...a 27 2mm diameter seatpost and be sure that the seatpost is held securely by the seatpost collar The seatpost collar clamp bolt must be torqued to 70 80 In Lbs 8 9 Nm Failure to properly torque the c...

Page 14: ...e seat It may be easiest for the rider to lean against a wall or post It is important that the rider not bounce the bike Then have the rider carefully dismount the bike again being careful not to boun...

Page 15: ...te the different ride characteristics You may want to change your rebound setting for different riding conditions COMPRESSION DAMPING ADJUSTER Fox FLOAT RC rear shocks also have a compression adjuster...

Page 16: ...l for more details All other components including HeadShok forks suspension parts frame fixtures and finishes paint and decals are warrantied against manufacturing defects in materials and or workmans...

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