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Cannondale’s Jekyll 29 1 is a high-performing full-suspension endurance machine that is surprisingly agile with all-mountain capabilities. This version comes with 29-inch wheels, helping you roll right over obstacles rather than having to find away around them. Maximum maneuverability and control is synonymous with the Jekyll thanks to a center to rear-biased weight distribution. This setup along with a short stem and wide handle bars give riders everything they need to dominate technical terrain.

The frame of the Cannondale Jekyll 29 1 is made with BallisTec carbon, giving it a lightweight and stiff feel without sacrificing its durability. The carbon frame is complimented by SmartForm Alloy swingarms which add to the overall strength and stiffness of the frame. Outstanding stability is achieved through a 65-degree head tube angle along with ultra-short chainstays which allow for uncanny agility. A steep seat angle promotes powerful pedaling, especially through tough climbs. The geometry of the Cannondale Jekyll has all your bases covered in a true all-mountain bike.

Fox Shox jumped in to co-develop the suspension system on this bike with Cannondale. The Gemini Shock gives you full freedom of your suspension, helping riders excel in all areas of the ride from technical terrain to climbs and flat sprints. You can choose “Hustle Mode” which shortens the travel to 120mm or “Flow Mode” which is good for 150mm of travel. The suspension mode is easy to change on the fly so you can quickly adjust to the terrain ahead. A single-pivot design link between the swingarm and shocks to keep the suspension active through braking. Flatmount disc brakes assure that stopping is always a confident endeavor in any weather.

The Jekyll is compatible with all shifting systems and is Di2 ready in case you want to switch to an electronic group. An internal battery mount is featured for a clean look while leaving clearance for an internal dropper post. This version features a SRAM X01 Eagle 12-speed groupset. Clean cable management securely houses all cables regardless of configuration. A water bottle mount is integrated into the frame in a way that keeps it safe from spray and mud while keeping it within an arm’s reach, topping off the convenience of this bike. If you are ready to tear up the most technical trails, the Cannondale Jekyll will be right there with you.


  • Frame: Jekyll 29”, 150mm travel, BallisTec Carbon front triangle, SmartForm C1 Alloy Swingarm, Ai offset drivetrain, ISCG05, PF30, flat mount brake, tapered headtube
  • Fork: Fox Float Factory 36, 150mm, FIT Grip2 Damper, Kashima coating, 15x110, tapered steerer, 42mm offset
  • Shock: Fox Float Factory DPX2 EVOL with Gemini dual mode air spring system (150/125mm), remote-actuated, 3-position adjustment
  • Headset: Integrated 1 1/8 – 1 1/2 “ sealed angular contact bearings
  • Seatpost: Fox Transfer dropper, internal routing, 31.6, 150mm (125mm for small)


  • Bottom Bracket Cannondale Alloy PressFit30
  • Brake Calipers SRAM Code RSC Hydro Disc
  • Brake Levers SRAM Code RSC Hydro Disc
  • Cassette SRAM XG-1295, X01 Eagle, 10-50, 12-Speed
  • Chain SRAM X01 Eagle, 12-Speed
  • Crankset Truvativ Stylo 7K, 30T, Ai Custom
  • Fork Fox Float Factory 36, 150mm, FIT Grip2 Damper, Kashima Coating, 15x110, Tapered Steerer, 42mm Offset
  • Grips Cannondale Locking Grips
  • Handlebar Cannondale C1 Riser, Carbon, 15mm Rise, 9° Sweep, 4° Rise, 780mm
  • Headset Integrated, 1-1/8 To 1.5", Sealed Angular Contact Bearings
  • Pedals Not Included
  • Rear Derailleur SRAM X01 Eagle
  • Rear Suspension Fox Float Factory DPX2 EVOL W/ Gemini Dual Mode Air Spring System (Flow Mode - 150mm / Hustle Mode - 120mm), Remote-Actuated, 3-Pos Adj.
  • Rotors SRAM Code RSC Hydro Disc, 200/180mm Centerline Rotors
  • Saddle Fabric Scoop Shallow Elite, Cro-Mo Rails
  • Seatpost Fox Transfer Dropper, Kashima Coating, Internal Routing, 31.6, 125mm (S), 150mm (M-XL)
  • Shifters SRAM X01 Eagle, 12-Speed
  • Stem Cannondale C1, 3D Forged 6061 Alloy, 1-1/8", 31.8, 0°, 35mm
  • Tires Maxxis Minion DHF 29 X 2.5" WT Front, DHR II 2.4" WT Rear, 3C Compound, Max EXO Puncture Protection, Tubeless Ready
  • Wheel - Front Stan's NoTubes Flow MK3 Rims, 32h, Tubeless Ready, SRAM 900 15x110, DT Swiss Competition Spokes
  • Wheel - Rear Stan's NoTubes Flow MK3 Rims, SRAM 900 Hubs
*Specifications are subject to change.


Bike Geometry
SizeSeat Tube (c-c)Seat Tube (c-t)Top Tube LengthHead Tube LengthChain Stay LengthSeat Tube AngleHead Tube AngleStand Over HeightWheel SizeStackReach
S 400 - 586 102 442 75.0 65.0 760 - 595 419
M 430 - 611 115 - - - 766 - 606 441
L 460 - 636 127 - - - 776 - 617 463
XL 520 - 664 140 - - - 788 - 629 488

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