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Ships within 48 hours · Estimated delivery Jul 4 - Jul 9
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Description
folding bike fixed gear Hummingbird Carbon Folding BikeThe Single Speed Hummingbird is the lightest folding bike in the world, handmade in UK. Our single gear hub is a ultra light and smooth design with a carefully balanced gearing to ensure effortless riding. The ultimate purist bicycle simple, fun and easy to use. Specification: WEIGHT: 6. 9kg 15 Pounds GEARING: 60 gear inches, 4. 80 meters development Gearing Combinations: 60 Gear Inches Easy (Standard, 65 Gear Inches Medium, 72 Gear Inches Fast Brake
The Single-Speed Hummingbird is the lightest folding bike in the world, handmade in UK.
Our single gear hub is a ultra light and smooth design with a carefully balanced gearing to ensure effortless riding. The ultimate purist bicycle - simple, fun and easy to use.
Specification:
- WEIGHT: 6.9kg - 15 Pounds
- GEARING: 60 gear inches, 4.80 meters development
- Gearing Combinations: 60 Gear Inches - Easy (Standard, 65 Gear Inches - Medium, 72 Gear Inches - Fast
- Brake Levers: Aest CNC ultralight
- Cables: Jagwire ultra-slick cables with polished stainless steel inner cables
- Seatpost: Full Carbon with Titanium hardware
- Seatclamp: CNC design, diameter: 41mm
- Crankset: Shimano Alfine Hollowtech 170mm crank arm length
- Chainring: 48 teeth with integrated CNC chain guard
- Pedals: Quick release with sealed bearings
- Wheelset: Ultra-light aluminium alloy with butted spokes and sealed bearings ISO 349 mm wheel size
- Rear Sprocket: 13 teeth 9 spline design
- Grips: Ultra light EVA foam
- Handlebars: Full Carbon 520mm wide with a 50mm rise to allow adjustment of reach
- Seat: Ultra light Carbon rails with a 130mm width, high density padding and ergonomic cut-out for better comfort
- Brake calipers: Tektro R539 dual pivot design with quick release tabs for easier wheel removal
- Bottom Bracket: Shimano Ultegra Press Fit sealed bearing unit
- Chain: YBN super light hollow pin design, nickel plated for longer service.
- Tyres: High performance Schwalbe Kojak with Kevlar bead, puncture protection and reflective band for high visibility 16" 32-349 tyre size
- Approximate Folded Dimensions: 117x60x20 Centimeters - 46x23x8 Inches
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- 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
4.8 ★★★★★
Based on 1983 reviews
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Product Reviews
★★★★★ 4
Heavy-Duty That Works!
Material Type: 157mil Closed Cell Foam, Style: 157 mil 36 SqFt
This extreme sound deadening mat performs well for reducing road noise and vibration. It feels dense and adheres securely when properly applied. Once installed, it noticeably improves interior quietness.
Overall, it’s a strong choice for more serious sound insulation projects.
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Reviewed in the United States on May 12, 2026
★★★★★ 5
Good product, quite sticky I must say.
Material Type: 157mil Closed Cell Foam, Style: 157 mil 36 SqFt
Worked for my van insulation
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Reviewed in the United States on June 1, 2026
★★★★★ 5
Good stuff
Material Type: 157mil Closed Cell Foam, Style: 157 mil 36 SqFt
Good stuff, easy to use, self adhesive backing contours around curves easily and works great.
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Reviewed in the United States on April 29, 2026
★★★★★ 5
Works amazingly, but only if you install it correctly.
Material Type: 157mil Closed Cell Foam, Style: 157 mil 36 SqFt
If you purchasing Siless Liner 157 mil (4 mm) Sound Deadening mat, to block unwanted sounds in your car, this is what you need to buy. But wait! It's not the only thing you need to buy if you want to "actually" deaden sound.
By itself, it will definitely block a noticeable amount of sound, and, most likely, that's all you realistically need. But... But... If you want the Siless Liner Sound Deadening Mat to really help you take it up a few notches, to get the best sound almost bordering on soundproofing, listen up.
You will have to install traditional butyl rubber first. Doesn't have to be the Siless brand, but I'm sure they would love to sell both to you, I used both Killmat (80mil) and Noico (50mil).
I have a Honda S2000. It's a two-seater convertible sports car if you don't know what this car is, and it's loud when I'm driving above 60mph. I also happen to have a sound system installed as well. Other than that, the car is stock. I first installed the butyl rubber on the car's interior sheet metal. I went all out and covered everything I could. I didn't need to but I wanted to. I was extremely impressed with the results. But I wanted to go further. Not because I needed to but because just wanted to see what it would be like.
So I bought Siless Liner 157 mil (4 mm) 36sqft Sound Deadening mat to go on top of the butyl rubber mats. I put this over every area I installed the butyl rubber. I had to be careful of clearance issues since I added a significant amount of underlayment, and you should too.
If you put butyl rubber sound-deadening materials in 50% of the total interior area, you'll hear a noticeable improvement. If you put butyl in about 80% of the total area, you'll be even more amazed at the improvement, compared to before.
I originally did all the above myself, so that's my experience and so your mileage may vary.
I then installed the Siless Liner Sound Deadening mat over every place I could even going further than I could with the butyl rubber. I used the Siles Liner in areas where butyl rubber would not have been effective, such as the roll bar hoop area and large empty cavities or holes.
I covered everything I could, firewall, doors, floor pan, transmission tunnel, trunk, trunk lid, fuel tank area, rear quarter panels, and rear-wheel tunnels, in Siless Liner Sound Deadening Mat.
WOW!! The Siless Liner Sound Deadening Mat was the icing on the cake! Let's not forget, this car is a convertible sports car so it will never be a quiet ride, ever. But I can now actually have a conversation with a passenger at a normal-ish volume! This also means I can now have a normal hands-free phone call without having to plug one ear to block out the noise! My sound system sounds so much better! Just by going through the install process, I looked for any vibration, rattle, squeak, and noise-prone areas to either eliminate or reduce unwanted noise production. If you forget this step, the inside and outside of your car will rattle and buzz. I skipped this step the first time around. But did it right before I installed more butyl rubber and the improvement was impressive, especially inside the car. Outside the car, I didn't notice a difference until I put the last layer of Siless Liner Sound Deadening Mat. The sound deadening mat works both ways from what I can tell. If I turned up my music, as loud as I occasionally do, parked in the attached garage to the house, with the garage door closed, I would be barely able to tell the car was playing music in the garage. It sounds like it is another car, just a little bit down the street, with a very loud base. If you stand 20 feet away outside the car, the sound system is noticeable, but not obnoxious by a long shot.
Get a 3 piece wood/metal roller set as well, which makes quick work of large areas.
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Reviewed in the United States on December 23, 2021
★★★★★ 5
Better than Kilmat
Material Type: 157mil Closed Cell Foam, Style: 157 mil 36 SqFt
Great adhesion, and you can immediately see the sound difference when you rap the area and compared it to another area without it. Also, very easy to cut and apply. Once on, you may not be able to peel it and reposition it, so be sure where you want it.
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Reviewed in the United States on March 2, 2026