From 15 Feb to 30 April, enjoy free overseas shipping within Southeast Asia for all Birdy orders!
Birdy JK11 Gravel | 11-Speed | Performance Foldable Bike
¥648,100
¥583,300
Birdy JK11 Gravel | 11-Speed | Performance Foldable Bike
¥648,100
¥583,300
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 C17 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 Groupset
The Ultegra R8000 series features a low profile and single tension construction. It does not hit the chainstay even in rough riding conditions, providing smooth and silent performance. 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 Flat Bar 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)
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.
Related products
Subscribe for latest news
Sign up for our mailing list to receive new product alerts, special offers, and event news.