Cannondale Jekyll Alloy 3 27.5 Bike - 2016

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An adept climber and aggressive descender, Cannondale Jekyll 3 bike's superlight, super precise-handling chassis and instant dual mode technology are made for the unpredictable world of Enduro racing.

  • Features

    • No matter what the course throws your way, the dual modes and unmatched responsiveness give you edge you need to win
    • Flip from short travel on the climbs to long travel on the descents, short for the flats and long for the roughs, and short for powering out and long for dropping in
    • RockShox Pike RCT3 Solo Air provides and impressive 160mm of travel; Fox DYAD RT2 rear shock's travel adjust 95 - 160mm
    • ECS-TC system eliminates the subtle flex and play that occurs in crucial links and pivots connecting the front triangle and swing arm
    • The result of the ECS-TC system is unmatched stiffness, instantaneous response and improved terrain feedback
    • Trans-X Dropper seatpost delivers 120mm travel
    • Specs and images are subject to change


    This bike comes with Coast to Coast Support, which includes:
    • 1 year of free adjustments (see more below)
    • In-store bike assembly
    • Pickup in store or curbside
    • Bike experts available at 170+ bike shops
    REI Co-op Members get more:
    • Free flat tire repairs (labor only; parts not included)
    • 20% off shop services
    More about our free adjustments:
    New bikes go through a normal break-in period, after which they should be readjusted. All bicycles sold at REI include free adjustments for one year after purchase date—as many times as you need. Included: derailleur and brake adjustments, lateral wheel truing, hub and headset bearing adjustments, tire inflation and chain lubrication. Not included: replacement or installation of new components or accessories, any other services. Call your local REI Co-op Bike Shop for more information.

    View the Cannondale Jekyll Product LineView all Cannondale Full-Suspension Mountain Bikes
  • Technical Specs

    Best Use

    Mountain Biking

    Mountain Bike Style



    SmartFormed alloy

    Bike Suspension

    Full Suspension


    RockShox Pike RCT3 Solo Air, 160mm with 15mm thru-axle

    Fork Travel

    160 millimeters

    Rear Shock

    Fox DYAD RT2, 160/95mm adjustable travel


    Race Face Aeffect, 36/22

    Bottom Bracket

    Race Face BB30


    Shimano SLX

    Front Derailleur

    Shimano Deore

    Rear Derailleur

    Shimano XT, Shadow Plus

    Rear Cogs

    Shimano HG-50, 11-36, 10-speed

    Number of Gears

    20 gear(s)

    Brake Type

    Hydraulic Disc Brake


    Shimano SLX hydraulic disc

    Brake Levers

    Shimano SLX


    WTB Frequency Race i25, tubeless ready

    Front Hub

    Formula DC51, 15mm thru-axle

    Rear Hub

    DC360, 142x12mm

    Wheel Size

    27.5 inches


    Schwalbe Hans Dampf Performance, 27.5 x 2.35

    Tire Width

    2.35 inches

    Handlebar Shape

    Riser Bar


    Cannondale C3 alloy


    Cannondale C3 6061 alloy

    Seat Post

    Trans-X Dropper, 120mm travel


    WTB Silverado


    Sold separately


    Tange Seiki 1-1/8 to 1.5", integrated


    KMC X10

    Dropper Post



    31 lbs.

    Bike Weight

    Bike weight is based on median size, as sold, or the average of two median sizes.



  • Size Chart

    Effective Top Tube55.558.5
    Seat Tube Center-Top38.044.0
    Standover Height43.543.5
    Head Tube Length16.518.0
    Head Tube Angle (degrees)67.067.0
    Seat Tube Angle (degrees)73.073.0
    Bottom Bracket Height29.929.9
    Fork Offset4.64.6

    Sizing Notes

    Measurements are stated in centimeters unless otherwise indicated.

    How we measure bikes

    1. Standover Height Standover Height is a measurement from the ground to the top of the top tube, measured at the midpoint of the top tube.
    2. Reach Reach is the horizontal distance from the center of the cranks to the center of the head tube, measured at head tube level.
    3. Stack Stack is the vertical distance from the center of the cranks to the center of the head tube, measured to the top of the head tube.
    4. Effective Top Tube Effective top tube is the distance from the center of the head tube to the center of the seat tube/seat post, measured parallel to the ground.
    5. Seat Tube Center to Top Seat Tube length is the measurement of the seat tube, from the center of the cranks to the top of the seat tube.
    6. Head Tube Length Head Tube Length is measured from the bottom to the top of the head tube.
    7. Head Tube Angle Head Tube Angle is the acute angle between the head tube and the ground (measured towards the rear of the bike)
    8. Seat Tube Angle Seat Tube Angle is the acute angle between the seat tube and the ground (measured towards the rear of the bike).
    9. Bottom Bracket Height Bottom Bracket Height is a measurement taken vertically from the ground up to the center of the cranks.
    10. Wheelbase Wheelbase is the measurement from the center of the front axle to the center of the rear axle.
    11. Chainstay Length Chainstay Length is the measurement from the center of the cranks to the center of the rear axle.
    12. Fork Offset Fork Offset, or rake, is the distance from the front axle to a line drawn parallel to the center of the head tube or steering axis.
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