Dahon K One 20inch Folding Bike FKA091
$3,180.00
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The Dahon K One (FKA091) is a 20-inch, 9-speed aluminium folding bike with disc brakes, for riders who want one folding bike for daily trips and weekend cycle-track rides. Dahon Hong Kong lists it at about 12.08 kg, folding to 87 cm long × 67 cm high × 41 cm wide.
At a glance
- Category: 20-inch folding bike, 9-speed, disc brakes
- Brand: Dahon; official product name DAHON K ONE (FKA091)
- Key feature: aluminium frame with 9 speeds and disc brakes; the new K One shown in Jollymap's video comes with an upgraded handlepost design
- Key figures: about 12.08 kg; folded 87 × 67 × 41 cm (L × H × W)
- Best for: city riders with some hills on their route who want more gears and disc brakes; if you take the bike on the MTR every day, a 16-inch folder is easier
What problem does it solve?
Small-wheel folders are easy to carry, but they can feel less settled on longer cycle-track rides. Jollymap's Dahon buying guide describes 20 inches as the size that balances pedalling stability, speed and portability, suiting cycle-track rides and commuting. The K One puts 9 gears and disc brakes on a 20-inch frame, so you have a suitable gear on the flat and on climbs, and it folds away to save space at home or in the office.
Who is it for?
The K One suits riders who mainly use cycle tracks and city roads, with some hills, and want a wider gear range. If you take the bike on the MTR every day or often carry it up and down stairs, its folded size and roughly 12 kg weight may not be ideal; consider the 16-inch Dahon K3 Plus 16-inch (305) Folding Bike KAA693 2nd gen V2 (9.8 kg per Dahon). Dahon Hong Kong does not publish a maximum load or rider height for the K One; Jollymap's K One introduction notes that the adjustable handlebar and saddle suit riders about 145–195 cm tall. If you are a heavier rider or near either end of that range, please contact us before ordering.
9 speeds with disc brakes
Dahon Hong Kong lists the K One as 9-speed with disc brakes. The official photos show a Dahon 9-speed rear derailleur and a trigger shifter with a gear indicator, and the brakes work on rotors at the hubs. Shift to an easier gear on climbs, with enough range for everyday riding.
Aluminium frame, about 12.08 kg
The K One uses an aluminium frame and weighs about 12.08 kg according to Dahon. Folded, it takes up less room than a regular 20-inch bike, which helps in small Hong Kong homes.
Practical stock fittings
The official photos show a kickstand and a guard ring around the chainring. Fittings may vary between production batches; please contact us before ordering if you need to confirm.
How to choose a Dahon 20-inch folding bike
| Model | Wheel size | Drivetrain | Brakes | Frame | Weight (approx.) | Folded size (L × W × H) | Best for |
|---|---|---|---|---|---|---|---|
| Dahon Dream D6 20 inch Folding Bike HAT061 | 20" | 6-speed | V-brakes (Dahon global site, archived) | High-carbon steel | 14.3 kg (Dahon official) | 80 × 28 × 65 cm | First-time folding bike riders, 150–180 cm tall |
| Dahon Dream D6 20 inch Folding Bike HAT060 | 20" | 6-speed | V-brakes (Dahon global site, archived) | High-carbon steel | 14.3 kg (Dahon official) | 80 × 28 × 65 cm | Riders 150–180 cm tall and up to 105 kg |
| Dahon KBA061 Super Light 20" Folding Bike | 20" | 6-speed (14–28T) | V-brakes (Dahon global site) | Aluminium alloy | 12.06 kg (Dahon official) | 82 × 35 × 66 cm | Everyday riding, mostly on flat routes |
| Dahon SUV D6 20inch Folding Bike HAA061 | 20" | 6-speed (14–28T) | V-brakes (Dahon global site) | Aluminium alloy | 13.1 kg (Dahon Hong Kong, archived) | 80 × 34.5 × 66.5 cm (Dahon Hong Kong, archived) | Leisure rides on city streets or along the waterfront |
| Dahon Boardwalk D7 20inch Folding Bike HAC072 | 20" | 7-speed | V-brakes (Dahon official product photo) | Chromoly steel | 11.9 kg (Dahon official) | — | Leisure riders who like a retro look and the comfort of a steel frame |
| Dahon ROUTE 7Speed Folding Bike PYA071 | 20" | 7-speed (Shimano Tourney rear derailleur) | V-brakes (Dahon UK site) | Aluminium alloy | 11.98 kg (Dahon UK site) | 80 × 34 × 66 cm (Dahon UK site) | Riders 145–190 cm tall for exercise, short tours or shopping trips |
| Dahon 40 Anniversary Speed P8 20inch Folding Bike KBC083 | 20" | 8-speed | V-brakes (Jollymap product data) | Chromoly steel | 12.8 kg (Dahon official) | 81 × 31 × 66 cm | Riders 150–180 cm tall who want the 40th-anniversary paint and a simple V-brake setup |
| Dahon Speed P8 20inch 8 speed Folding Bike KBC083 | 20" | 8-speed | V-brakes (Jollymap article) | Chromoly steel | 12.7 kg (Dahon official) | 81 × 31 × 66.5 cm | Riders 150–180 cm tall who want a simple V-brake setup |
| Dahon Launch 2000 20inch Folding Bike KAC082 | 20" | 8-speed | — | Chromoly steel | 12.5 kg (Dahon Hong Kong, archived) | 76 × 37 × 66.5 cm (Jollymap product data) | Riders 150–180 cm tall for leisure and city riding |
| Dahon Launch D8 (KBA083) 8 speed disc folding Bike (Jaws Hinge) | 20" | 8-speed (Dahon custom rear derailleur, 11–32T) | Disc brakes | Aluminium alloy; Jaws folding hinge | 12.1 kg (Dahon global site) | 82 × 39 × 62 cm (Dahon global site) | Riders who want a firmly locking hinge and disc brakes |
| Dahon Launch D8 (KBA083) 8 speed disc folding Bike | 20" | 8-speed (Dahon custom) | Disc brakes | Aluminium alloy; standard folding hinge | 12.1 kg (Dahon official) | 82 × 38 × 64 cm | Riders who want an aluminium frame with 8-speed gearing, disc brakes and the standard hinge |
| Dahon K One 20inch Folding Bike FKA091 (this page) | 20" | 9-speed (11–32T) | Disc brakes | Aluminium alloy | 12.08 kg (Dahon official) | 87 × 41 × 67 cm | Leisure and fitness riders about 145–195 cm tall (Jollymap article) |
| Dahon Vigor D9 9 Speed 20inch Folding Bike - ECA093 | 20" | 9-speed (53T, 11–32T) | Mechanical disc brakes (160 mm rotors front and rear) | Aluminium alloy frame and fork | 12.68 kg (Jollymap review, with pedals and kickstand) | 79 × 37 × 67 cm | Heavier riders, or anyone who wants a stiff frame and a solid ride feel |
| Dahon KAA014 20inch Folding Bike | 20" | 11-speed | V-brakes (Dahon official product photo) | Aluminium alloy | 10.8 kg (Dahon official) | 81 × 39 × 65 cm | Experienced riders who are more demanding about gearing |
| Dahon K One Super Light 20inch 451 18speed Folding Bike FDA083 | 20" (451) | 18-speed (53/39T double chainring) | Disc brakes | Aluminium alloy | 11.95 kg (Dahon official, with pedals) | — | Riders who want 451 wheels and a double chainring for a wider gear range |
Choose by what matters most:
- More gears and speed: Dahon K One Super Light 20inch 451 18speed Folding Bike FDA083 – the double-chainring K One with 20-inch 451 wheels, 18 speeds and disc brakes; 11.95 kg with pedals per Dahon.
- Also 9-speed disc, with a seatpost pump: Dahon Vigor D9 9 Speed 20inch Folding Bike - ECA093 – curved "dolphin" aluminium frame; the official photos show a pump inside the seatpost.
- Mostly flat routes, simple 6 speeds: Dahon KBA061 Super Light 20" Folding Bike – officially the Dahon Hit, aluminium frame, 12.06 kg per Dahon.
- Classic steel-frame looks: Dahon Boardwalk D7 20inch Folding Bike HAC072 – Cr-Mo steel frame, 7 speeds, 11.9 kg per Dahon.
- Steel frame with 8 speeds: Dahon Speed P8 20inch 8 speed Folding Bike KBC083 – Cr-Mo steel frame, 8 speeds, 12.7 kg, max load 105 kg per Dahon.
Further reading: Jollymap's 2026 Dahon folding bike buying guide and big wheels vs small wheels: 8 bikes tested from the Dahon K3 to a road bike.
Jollymap's advice
If you ride mainly on cycle tracks and city roads with a few hills, the K One's 9 speeds and disc brakes make things easier; if you mostly ride to the MTR or carry the bike often, a 16-inch folder is more convenient. Not sure which suits your height, storage space or daily route? Chat with us or message our Facebook page before ordering, with your height, weight and where you will store the bike.
Specifications
| Dahon K One (FKA091) | |
|---|---|
| Brand | Dahon |
| Model | FKA091 |
| Wheel size | 20 inch |
| Gears | 9-speed |
| Brakes | Disc brakes |
| Frame | Aluminium |
| Weight | About 12.08 kg |
| Folded size | 87 cm long × 67 cm high × 41 cm wide |
Specification source: Dahon Hong Kong official product page (dahon.com.hk). Measurements may differ slightly because of different measuring tools; pictures are for reference only and the actual product prevails.
FAQ
How much does the Dahon K One weigh?
About 12.08 kg, as published by Dahon Hong Kong. Actual weight may vary slightly by production batch and measuring tool.
What are the Dahon K One FKA091 specs?
According to Dahon Hong Kong, the K One (FKA091) has 20-inch wheels, 9 speeds, disc brakes and an aluminium frame, weighs about 12.08 kg and folds to 87 × 67 × 41 cm (L × H × W). Dahon does not publish a maximum load or rider height; please contact us before ordering if you need to check.
What is the difference between the K One FKA091 and the double-chainring K One FDA083?
Gearing and wheels. The FKA091 has a single chainring and 9 speeds; the K One FDA083 has 53/39T double chainrings, 18 speeds and 20-inch 451 wheels, weighing 11.95 kg with pedals per Dahon. Both have aluminium frames and disc brakes.
Dahon K One vs K3 Plus: which should I choose?
The K One has 20-inch wheels and rides more like a regular bike. The K3 Plus 16-inch (305) has smaller wheels, weighs 9.8 kg per Dahon, also has 9 speeds and disc brakes, and is easier to carry when folded. Choose the K One for longer rides and stability, the K3 Plus if you often carry the bike on public transport.
Dahon K One vs Speed P8: what is the difference?
The K One has an aluminium frame, 9 speeds and disc brakes, at about 12.08 kg; the Speed P8 has a Cr-Mo steel frame, 8 speeds and V-brakes, at 12.7 kg with a 105 kg maximum load per Dahon. Both have 20-inch wheels.
Is this K One an electric bike?
No. The K One (FKA091) on this page is a regular folding bike with no motor or battery. Dahon also sells an electric folding bike under the "K-One" name in some overseas markets, which is a different product.
Can I take the Dahon K One on the MTR or a bus?
Not necessarily. Based on the official folded size (87 × 67 × 41 cm), the three sides add up to about 195 cm, over the MTR limit of 170 cm for the total length, width and height of luggage. Franchised buses generally only allow items within 5 kg and 0.1 cubic metres (Public Bus Services Regulations, Cap. 230A, section 14), and minibuses are not guaranteed. Please check the latest rules with the MTR or bus operator before you travel.
Where can I buy the Dahon K One in Hong Kong?
It is available at the Jollymap online shop and store. To confirm colours or batch fittings before ordering, chat with us online or message our Facebook page.
Specifications and components follow the manufacturer's latest release and may change without notice. If in doubt, please contact us to confirm before ordering.
Last updated: October 2026
