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2018 Cannondale

Jekyll 1

A 27.5″ carbon frame full suspension enduro bike with ultra high-end components.
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Manufacturer Price

$7,750
FrameCarbon
SuspensionFull, 165 / 170mm
ForkFox Factory Float 36
ShockFox Float X Factory
Wheels27.5″ Carbon
Drivetrain1 × 12
GroupsetXX1 Eagle, Truvativ Descendant Carbon
BrakesSRAM Guide RSC Hydraulic Disc
SeatpostDropper
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Insights
Ride Feel

Based on frame geometry and build specs.

Terrain
easyextreme
Handling
nimblestable
Jekyll 1
Other Enduro bikes
Gearing

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Lowest gear

(climbing)

25 mph

Jekyll 1

26 mph

Similar Bikes

Highest gear

(descending)

Sizing
SM

5'2" – 5'8"

MD

5'6" – 5'11"

LG

5'10" – 6'3"

XL

6'1" – 6'7"

🐐 Estimated

Rider Fit Notes

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Reviews

Summary

The Cannondale Jekyll is a versatile enduro bike praised for its adjustable Gemini suspension system, offering a smooth, bottomless-feeling ride and efficient climbing. Its geometry and handling are optimized for both descents and climbs, though some reviews note a lack of confidence on steep terrains and a perched riding position. The bike's design and spec are generally well-received, with particular highlights on its suspension performance and value.

Pros
  • Adjustable Gemini suspension system for versatile performance

  • Smooth, bottomless-feeling rear suspension

  • Efficient climbing with excellent traction

  • Stable and grippy feel while descending

  • Good value for its versatility and performance

Cons
  • Lacks confidence on very steep terrains

  • Perched riding position may not suit all riders

  • Hefty weight for some models

  • Limited DIY tuning potential for the rear shock

  • Unbalanced handling noted in some reviews

Key Quotes
At $3,800, the Jekyll 29 3 is a bike that offers Swiss Army Knife versatility at an excellent value.
BIKE Magazine logoBIKE Magazine
The Gemini’s ability to reduce travel on the fly, without diminishing its sensitivity to bumps, is a huge advantage.
Bicycling
The Jekyll has two distinct personalities.
Bikerumor logoBikerumor

Feedback?

View all reviews

Loam Wolf
Review: Cannondale Jekyll 29-1

Sep 2019

Cannondale Jekyll 29-1   Action Photos by Trevor Lyden Definitely more Hyde than Jekyll, Cannondale’s newest iteration of their flagship enduro machine has been graciously updated for the modern trail rider. Cannondale has been at the forefront of shape shifting technology for many years, and the

Read Review

Pinkbike
Review: 2019 Cannondale Jekyll 29-1

Feb 2019 · Richard Cunningham

The Jekyll 29 marks the final step that Cannondale needed to bring their flagship enduro racer to its potential.

Highs
  • Ready-for-anything build

  • Great flow going up or down

  • Big wheel roll-over without big wheel sluggishness

Lows
  • May be too normal for vanguard riders

  • Fussy shock tune

  • Some may be put off by the Gemini remote

Read Review

Enduro Mountainbike Magazine
Cannondale Jekyll 29 1 in review

Sep 2018 · Christoph Bayer

Review: All of a sudden it just appeared out of nowhere: the Cannondale Jekyll 29! We quickly put one to the test on the trails.

Read Review

BIKE Magazine
Tested: Cannondale Jekyll 29 3

Sep 2018

The 29-inch Jekyll promised to offer the support and stability we wanted more of in its small-wheeled sibling. And it did, but in a decidedly conservative, trail-oriented package.

Read Review

Mountain Bike Action
Spotted - Cannondale's Prototype Jekyll 29er

Jul 2018 · McCoy

There were plenty of sweet bikes and products on display at Eurobike this year. Walking through the WTB booth we spotted Marco Osborne's Jekyll with

Read Review

MTB Mag
[Tested] Cannondale Jekyll 2

Jan 2018 · Ian Collins

I’ve got to admit…In the past, I was never really a big fan of Cannondale. It started out when I was a kid working at a bike shop that carried them. In my opinion, a great deal of their efforts were different purely for the sake of being different and standing out, not necessarily different because said efforts brought about measureable improvement. The brand has been behind some interesting innovations over the years, but past efforts such as 4-bolt brake rotors were just flat out stupid. But hey…maybe I’m just childish for holding a grudge and being apprehensive. Anyhow, fast forward almost two decades and I

Read Review

Flow Mountain Bike
Tested: Cannondale Jekyll 2

Sep 2017

Watch our full video review below:  So what’s new? Everything. Cannondale went right back to the fundamentals with this one, leaving a lot of previous development behind. We think it was the right call. Cannondale’s mountain bikes have been crying out for an injection of practicality and rider-first design, and with Jeremiah Boobar (the man …

Highs
  • Great geometry and handling for Enduro riding.

  • Simple and more user-friendly suspension.

  • Built to survive the toughest stages.

Lows
  • Suspension isn't supportive if you favour a plush setup with more sag.

Read Review

BikeRadar
Cannondale Jekyll 2 review

Aug 2017 · Guy Kesteven

Excellent geometry and kit plus unique shock create a crazy-fast enduro ripper. Buy if you want sorted shape, pert/plush performance with metal wheel toughness

Highs
  • Gemini shock system allows instant switching between super-plush speed or a tighter, more dynamic ride

  • Long-stretch/slack-head geometry, wide/short cockpit and XL front tyre create a massively confident front end

  • Excellent tough trail spec

Lows
  • Weight is pretty chunky for a medium-size £5k bike

  • Limited DIY tuning potential of the linear-feeling rear shock

Read Review

Geometry
Specs
Build
Frame

All-New Jekyll, 165mm travel, BallisTec Carbon Frame and Swingarm, carbon shock link, Ai offset drivetrain, ISCG05, PF30, flat mount brake, tapered headtube

BB StandardPF30, Press Fit

Fork

Fox Factory Float 36, 27.5, 170mm, HSC/LSC, 3-pos Adj. Kashima coating, 110x15, tapered steerer, 44mm offset

Travel170mm

Spring TypeAir

Shock

Fox Factory Float X EVOL w/Gemini remote-actuated dual mode air spring system, Flow Mode - 165mm / Hustle Mode - 130mm, Kashima coating, 3-Pos lever

Travel165mm

Bottom Bracket

Cannondale Alloy PressFit30

Headset

Integrated, 1-1/8 to 1.5", sealed angular contact bearings

Stem

Cannondale C1, 3D Forged 6061 Alloy, 1-1/8", 31.8, 0°, 35mm

Handlebar

Cannondale C1 Carbon Riser, 15mm rise, 4° up, 9° back, 31.8, 780mm

Saddle

Fabric Scoop Shallow Race with Titanium rails

Seatpost

RaceFace Turbine dropper, Internal Routing, 31.6, Travel - 125mm S / 150mm M-XL

TypeDropper

Pedals

Not included

Grips

Cannondale Locking Grips

Groupset
Rear Derailleur

SRAM XX1 Eagle 12-speed

Crank

Truvativ Descendant Carbon Eagle, BB30 w/ custom Ai offset, 30t

Shifters

SRAM X01 Eagle 12-speed, trigger

Cassette

SRAM XG1295 Eagle 10-50t, 12-speed

Chain

SRAM X01 Eagle 12-speed w/ PowerLink

Chain Guide

N/A

Brakes

SRAM Guide RSC hydro disc, Centerline rotors 200/180mm

TypeSRAM Guide RSC Hydraulic Disc

Brake Levers

SRAM Guide RSC w/ contact point adjust, cartridge bearing, reach adjust

Wheels
Rims

Cannondale HollowGram 30 Carbon, 30mm inner, Tubeless Ready 27.5"

Spokes

2.0/1.8/2.0 Stainless, Straight Pull

Front Hub

HollowGram 30 - 110x15 thru front / 148x12 thru rear w/Ai offset, Maxle Ultimate

Rear Hub

HollowGram 30 - 110x15 thru front / 148x12 thru rear w/Ai offset, Maxle Ultimate

Tires

Maxxis Minion DHF 27.5x2.5" front, DHR II 2.4" rear, 3C Compound, EXO puncture protection, folding, Tubeless Ready

Rider Notes
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First added February 20

Last updated October 10

Not listed for 2,429 days