Birdy JK11 Gravel | 11-Speed | Performance Foldable Bike
Specially customised for adventurous riders
A special collaboration between Mighty Velo and Joseph Kuosac, the JK11 Gravel features a 18” carbon wheelset with inherent damping properties to absorb bumps and vibrations, providing a smoother and more comfortable ride. Its Brooks C19 carved, waterproof saddle and Brooks cambium rubber grips are made for comfort under all conditions, while its Shimano Ultegra 11-speed derailleur allows the bike to overcome uneven surfaces and climb smoothly. The JK11 Gravel is a versatile bike designed to tackle adventures over almost any terrain.
Joseph Kuosac Wheelset with Billy Bonkers Tyres
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. For the JK11 Gravel, this wheelset has been paired up with Billy Bonkers tyres with closely positioned blocks for grip on dusty and sandy ground, equipping it for uneven terrains and leisurely rides over gravel.
Shimano Ultegra Derailleur
The Ultegra CS-R8000 rear derailleur offers a sleek appearance and optimized shifting performance that's both smooth and silent. The shifter offers clear contact with balanced rigidity, weight, and stopping power, while stabilizers between axles reduce deformation and improve braking efficiency.
Juin-Tech Cable Actuated Hydraulic Disc Brake
The R1 brake system mimics the powerful performance of traditional hydraulic brakes, but its cable-actuated design makes it a more versatile choice for those who prefer a variety of control options.
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 48T NW Chainring, Shimano Hollowtech II compatible
Chain
Shimano 105 11-Speed Chain
Cassette
Shimano Ultegra CS-R8000 11-Speed Cassette 11-32T
Derailleur
Shimano Ultegra R8000 11-Speed Short Cage Rear Derailleur
Shifter
Shimano RS700 11-Speed Flat Bar Shifter
Brakes
Brakes
Juin-Tech GT 4-Piston Brakes (Black)
Disc Rotor
Shimano 6-Bolt 160mm
Brake Lever
Shimano Deore BL-T610 Brake Levers
Wheels
Tyre
18″-355 Schwalbe Billy Bonkers (Black)
Rim
18″-355 Joseph Kuosac C38C Carbon Rim (White Labels)
Hub
Joseph Kuosac Front 24 / Rear 24 Disc Brake Hubs
Cockpit
Head Sets
Semi integrated 1-1/8″
Grips
Brooks Cambium Rubber Grips (Black/Copper)
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
Brooks Cambium C19 Carved All Weather Saddle (Black)
Accessories
Pedals
DMR V12 MTB Flat Pedals (Black)
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
10.7kg (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.