SKU: 90040770567
foldable gravel bike

foldable gravel bike Birdy JK11 Gravel | 11-Speed | Performance Foldable Bike

Sale price$22.95 Regular price$25.50
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USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Nov 14 - Nov 19

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For Your Every Summer RSVP, with Code: SUMMER15

Description

foldable gravel bike Birdy JK11 Gravel | 11-Speed | Performance Foldable BikeSpecially 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

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 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)

 


 

Important notes

  1. Specifications can change without prior notice.
  2. Images are for illustration purposes only. Please refer to the specifications.
  3. 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.
  4. All bikes purchased cannot be returned, refunded, or exchanged.
  5. Warranty is non-transferrable.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 90040770567

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The Lymans
Alexandria, US
★★★★★ 4
Size down! But overall comfortable and cute and good quality
Size: Small, Color: Light Yellow
Overall it’s cute and comfortable, but my advice is to SIZE DOWN!!! I wish I would have, but I’ve already washed it so it’s too late. The straps are adjustable, but even so, I’ve had to tighten them as far as they’ll go. For reference, I am 5’1” and 125#, rectangle shaped/boxy body with a very small chest and I got a Small. The top gapes open on me and the dress is longer than I prefer for this style. Material/fabric is nice and good quality and it’s a perfect one-piece easy outfit for warm days. I like the yellow color too. It is tricky to find the right bra to wear with it, though. Got lots of compliments on it the first time I wore it.
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Reviewed in the United States on April 22, 2026
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Jessica R.
Birmingham, US
★★★★★ 5
Cute, Comfy & Flowy—Great for Plus Size!
Size: XX-Large, Color: Black
I really like this dress! It’s super comfortable and lightweight, and the material feels soft without being too thin. It has a nice flow to it, so it doesn’t cling to your body, which I really appreciate. For reference, I’m 5’4” with a 46” bust, and the dress fits well overall. The length is great, and I love that it has a relaxed fit—it’s easy to throw on and still look put together. The pockets are also a nice bonus and actually usable. The only thing to note is the top area can be a little more open on the sides, so I personally prefer wearing a sports bra or something cute underneath. It actually works really well styled that way and gives that “layered” look. Overall, it’s a really easy, comfortable dress that you can dress up or down. I’ll definitely be wearing this a lot!
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Reviewed in the United States on May 20, 2026
A
Verified Purchase
AHappyGirl
Port Orchard, US
★★★★★ 5
Great dress for running around town
Size: Large, Color: Coffee
I love this dress. I ordered this dress fist in a medium, then a large. I probably would have been fine in the large, but I just wanted a little more room and I wanted it to come to my knees so I ordered the XL and I love it. The material is a cotton knit type material similar to a t-shirt with a little stretch to it. I am 5'2", #170 and the XL gave me the fit I was looking for, being loose and comfortable. There is a second layer under the dress that has shorts and a tank top built in. Unfortunately, you must take the entire thing off to use the restroom but I am considering adding snaps to the crotch so that it is easier and I won't have to completely undress to use the restroom. The olive/army green is beautiful and I am planning to order the plum color dress as another addition to my summer wardrobe.
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Reviewed in the United States on May 15, 2026
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Emma Bitner
Whiting, US
★★★★★ 3
Cute Idea, But Fit Didn’t Work for Me
Size: Medium, Color: Coffee
The material was nice but also a little different than expected. It’s soft, just not quite the level of softness I was hoping for. I do think it’s worth the price overall, but it’s not something I would personally wear 24/7. I ended up returning it because the fit just wasn’t quite right for me. It was very loose up top but really tight around the bottom, which made the cut a little off for my body type.
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Reviewed in the United States on April 28, 2026
S
Verified Purchase
Sophie
New York, US
★★★★★ 5
Postpartum Certified!! :)
Size: Medium, Color: Black
I am currently a breast feeding mother who is only 5 weeks post partum. Heading into the summer I needed clothes that fit my changing body and gave me a little confidence that I’ve been lacking recently. This dress has completely done it!! The material is extremely comfortable and not too tight on my body. It’s long enough to give me the coverage that I’m comfortable with but still makes me feel cute. Without knowing how to shop for or what size my body is at after birth, I listened to the comments and got a medium when I was thinking I might be a large and it fits great! Definitely size down though! I will be getting more!!!
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Reviewed in the United States on May 20, 2026

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