Birdy JK11 Ace | 11-Speed | Performance Foldable Bike
The ultimate in premium components for the most discerning cyclists
A special collaboration between Mighty Velo and Joseph Kuosac, the JK11 Ace features a carbon wheelset that enhances its acceleration, responsiveness, and overall speed. It also makes use of the highest quality components available, such as the advanced Shimano Dura-Ace derailleur, Ergon SMC Gel Saddle, and Ergon GP2-L grips. These components allow it to attain the pinnacle of performance and comfort, with top-of-the-line gear shifting and braking, while not sacrificing portability.
Joseph Kuosac C38C Wheelset
The Joseph Kuosac C38C carbon wheelset uses far lighter material than aluminium, with increased lateral and radial stiffness and improved aerodynamics. This results in a noticeable improvement in responsiveness and acceleration. Whether you’re out the saddle on a climb, attacking a descent or sprinting for the line, carbon road wheels give a sharp, responsive feel.
Shimano Dura-Ace Groupset
The Shimano Dura-Ace is the pinnacle of road cycling performance. Renowned for its precision, efficiency, and reliability, this top-tier groupset delivers unrivaled shifting and braking performance, even under heavy load or in challenging conditions. With advanced technologies, lightweight construction, and exceptional durability, the Dura-Ace is the choice of professional riders seeking the ultimate cycling experience.
Juin-Tech Cable Actuated Hydraulic Disc Brake
The Juin-Tech hydraulic disc brakes provide smooth and responsive braking thanks to non-corrosive and high-stability mineral oil within. They are also easy to adjust to the right state, resulting in more durable rotor and disc pads. Enjoy the greatest braking power on the road.
Specifications
Frame
Frame
Birdy G3 Monocoque 7005-T6 Aluminium
Fork
Hydroformed Front Suspension Fork w/ Disc Brake Mount
Rear Suspension
95D PU Elastomer
Drive Train
Bottom Bracket
Driveline Shimano Hollowtech II compatible threaded 68mm
Chainwheel
Driveline ZELE-A11-OS BCD110 Crankset with 52T NW Chainring, Shimano Hollowtech II compatible
Chain
Shimano 105 11-Speed Chain
Cassette
Shimano Ultegra CS-R8000 11-Speed Cassette 11-28T
Derailleur
Shimano Dura-Ace R9100-SS 11-Speed Short Cage Rear Derailleur
Shifter
Shimano RS700 11 Speed Flat Bar Shifter
Brakes
Brakes
Juin-Tech GT 4-Piston Brakes (Black/Blue/Purple/Gold/Green)
Disc Rotor
Shimano 6-Bolt 160mm
Brake Lever
Shimano BL-R780 Flat Bar Brake Levers
Wheels
Tyre
20″-406 Schwalbe ONE
Rim
20″-406 Joseph Kuosac C38C Carbon Rim / Black Labels
Hub
Joseph Kuosac Front 24 / Rear 24 Disc Brake Hubs
Cockpit
Head Sets
Semi integrated 1-1/8″
Grips
Ergon GP2-L Grips
Handlebar
Horizon AL6061T6 butted, 31.8x540mm 10D
Stem
New Birdy Double Lock, Telescopic 10 Degree Stem
Seat
Seat Post
Birdy SP61R.1 34.9mm AL7075 Hard Anodized w/ Laser Scale
Saddle
Ergon SMC Sport Gel Saddle
Accessories
Pedals
DMR V12 Magnesium Pedal (350g)
Chain Tensioner
PCI chain tensioner
Bell
Bell (Black)
Dimensions
Estimated Dimensions
Folded: 68cm(H) x 38cm(W) x 84cm(L)
Rider Height
145 – 185cm
Weight
Weight
10.9kg (incl. saddle & pedals)
Max Load
110kg (incl. rider & luggage)
Checks & Tuning
We provide complimentary bike checks and tunings for 6 months to all our bike customers*
*Terms and conditions apply
Warranty
All bikes purchased come with 1 year limited warranty on the frame and 6 months limited warranty on components*
*Terms and conditions apply
Foldable and packable
All our bikes are foldable and packable. Bring it with you anywhere you go. Enjoy your cycling anytime, anywhere.
Important notes
- Specifications can change without prior notice.
- Images are for illustration purposes only. Please refer to the specifications.
- International Buyers - Please Note: all import duties, taxes, and charges at the destination country are not included in the item price or shipping cost. These charges are the buyer’s responsibility.
- All bikes purchased cannot be returned, refunded, or exchanged.
- Warranty is non-transferrable.