Java NEO 20 inch 9s Folding Bike

The Java NEO 20 inch 9s Folding Bike is a 20-inch (ETRTO 406) tri-fold bike with an aluminium frame and aluminium fork, a 9-speed single-chainring drivetrain and full hydraulic disc brakes; Java's official weight is about 10.2 kg. It is the alloy-fork standard version of the Java NEO 20" range (official model NEO-406AL), for riders who want a steadier ride than a 16" folder without paying for a carbon fork or electronic shifting.

Key Facts

• Category: 20-inch (ETRTO 406) tri-fold folding bike, aluminium fork, 9-speed mechanical version (official model NEO-406AL)
• Brand: Java (a brand of Shenzhen Chuangxinwei Bicycle Co., Shenzhen, China)
• Standout feature: 20" 406 wheels on a redesigned frame geometry, with the handlebar about 100 cm off the ground (Jollymap's measurement of the 20" version), about 7–8 cm higher than the 16"
• Key numbers: official weight about 10.2 kg, Shimano CUES 9-speed shifter and rear derailleur (11–40T), 50T hollow integrated crankset (170 mm), full hydraulic disc brakes, quick-release pedals
• Colours: Titanium, Black, White, Titanium Black
• Best for: taller riders who find 16" folding bikes too low at the bars, and commuters or weekend riders who cruise cycle tracks for longer stretches

What problem does it solve?

Space is tight in Hong Kong homes, so many people choose a folding bike — but a 16" folder can feel low at the bars for taller riders, and it is tuned more for agility than stability. The Java NEO 20" is not just a 16" frame with bigger wheels: in Jollymap's hands-on comparison, the fork, rear triangle, wheelbase and overall geometry have all been changed. The handlebar sits at about 100 cm (16": about 92 cm) and the wheelbase grows from about 107 cm to 109.5 cm, so the bike feels roomier and more confident on straight cruising. The tri-fold design and quick-release pedals still let it fit in a car boot, beside a desk or in a corner at home.

Who is it for?

• Taller riders: Jollymap's guide suggests the 20" for taller riders (for example over 180 cm) for a roomier riding position
• Weekend cycle-track cruising: the longer wheelbase and a bottom bracket about 26 cm off the ground keep the bike settled on longer rides along the Tuen Mun–Yuen Long or Tai Wai–Tai Mei Tuk cycle tracks
• A first 20" folding bike: hydraulic disc brakes and 9-speed mechanical shifting are intuitive and simple to maintain
• Less ideal for: riders who need the smallest fold for frequent MTR trips — see the Java NEO 9S 16" 349 9 Speeds Folding Bike; riders who want better vibration damping should look at the carbon fork versions (see "How to choose" below)

20" 406 wheels that shrug off rough pavement

The wheels use the 20" 406 standard, and Jollymap's hands-on look at the 20" found 1.5" wide tyres — fatter than the 16". On Hong Kong's paving bricks, joints and patchy surfaces, the ride feels more planted.

Frame geometry redesigned for 20"

The distance between the seat post and head tube is almost the same as the 16", but the triangle in the middle of the frame is clearly larger and the rear triangle has been re-proportioned. The bottom bracket stays at about 26 cm off the ground, keeping the lower frame closer to level for a steadier centre of gravity when pedalling. Crank length goes up from 165 mm on the 16" to 170 mm to suit the bigger wheels.

9-speed single chainring with full hydraulic discs

Up front is a CNC-machined 50T hollow integrated crankset with no front derailleur, so you only work the Shimano CUES 9-speed shifter, paired with a CUES rear derailleur. The hydraulic disc brakes give linear stopping power with a light finger pull; Java describes the NEO range's hydraulic brakes as controllable and able to stop steadily on wet, slippery roads.

Semi-internal cable routing and quick-release pedals

According to Java, the bike uses semi-internal routing with part of the cabling hidden inside the frame for a cleaner look, and the pedals have a quick-release design so they come off quickly for easier storage when folded.

How to choose a Java NEO model

This page is the alloy-fork 9-speed version in the Java NEO 20" range. Compared with its closest siblings:

• Want better vibration damping? The Java NEO 20 inch 9 Speed Carbon Fork Folding Bike shares this bike's frame, wheels and drivetrain (Shimano CUES 9-speed, 11–40T) — the difference is the carbon fibre fork. Jollymap's guide notes that a carbon fork filters out fine, high-frequency road buzz — most useful if you ride for more than an hour at a time.
• Want electronic shifting? The Java NEO 20 inch Electric Shift 12 Speed Folding Bike has Wheeltop 12-speed electronic shifting with an 11–40T cassette and a carbon fork.
• Want a smaller fold? The Java NEO 9S 16" 349 9 Speeds Folding Bike uses 16" 349 wheels and 165 mm cranks — quicker off the line and smaller when folded.

For the whole range, read Jollymap's articles Java Neo Folding Bike Family Guide and Java Neo 20: What to Know Before You Buy (both in Chinese). The table below compares wheel size, fork, drivetrain and weight across the Java NEO range:

Jollymap's Advice

This bike comes in one frame size. If you're not sure it suits your height, please chat with us or message our Facebook page before ordering, with your height and inseam. For easier parking, we carry the Mr TiParts Aluminum Kickstand for Java Neo 20 inch and the Mr TiParts Carbon Kickstand for Java Neo 20 inch.

Specifications

Brand	Java
Official model	NEO-406AL
Frame	Aluminium alloy (tri-fold)
Fork	Aluminium alloy
Wheelset	20" (406) aluminium alloy wheelset
Tyre width	1.5"
Shifter	Shimano CUES 9-speed
Rear derailleur	Shimano CUES 9-speed
Cassette	9-speed, 11–40T
Chain	9-speed, 108 links
Crankset	50T CNC hollow integrated, 170 mm
Bottom bracket	Threaded
Brakes	Full hydraulic disc brakes
Handlebar / seat post	Aluminium alloy
Saddle	Black
Pedals	Quick-release
Weight	About 10.2 kg (Java official figure)
Folded size	About 73 × 32 × 64 cm (without pedals; dealer figure for the Java 20" carbon fork version, for reference)
Colours	Titanium, Black, White, Titanium Black

Spec sources: Java official website (NEO-406AL product page), Jollymap's original listing and Jollymap's hands-on articles; folded size from Java's UK dealer Fold BikeOn. Our earlier listing stated a weight of about 11 kg, which differs from the official figure — possibly due to how it was measured (for example with or without pedals). If weight matters to you, please contact us to confirm before ordering.

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Bike configuration specifications are subject to the factory's final decision.

FAQ

What's the difference between the Java NEO 20" and 16"?

The main differences are wheel size, frame geometry and folded size. The 20" uses 406 wheels and 170 mm cranks, with the handlebar about 100 cm off the ground (16": about 92 cm) and a wheelbase of about 109.5 cm (16": about 107 cm), so it rides more steadily and suits taller riders or longer cruising. The 16" uses 349 wheels and 165 mm cranks, accelerates more quickly and folds smaller, which suits riders who often take the bike on public transport. They are not the same frame — see Jollymap's article Java Neo 20: What to Know Before You Buy (in Chinese).

How much does the Java NEO 20" 9-speed weigh?

Java's official figure for this alloy-fork version (NEO-406AL) is about 10.2 kg. Our earlier listing stated about 11 kg; the difference may come from how it was measured. For reference, Jollymap measured the 20" carbon fork version at about 10.5 kg.

What is the folded size — can I take it on the MTR or a bus?

Folded size is about 73 × 32 × 64 cm (without pedals, using the dealer figure for the 20" carbon fork version as a reference). According to the Transport Department's Cycling Information Centre, MTR luggage must not exceed 170 cm in total length, width and height, with no side over 130 cm. These dimensions add up to about 169 cm — right at the limit — and the pedals add width, so remove the quick-release pedals before entering the gates. On franchised buses, the Public Bus Services Regulations (Cap. 230A) section 14 only allow articles within 5 kg and 0.1 cubic metres, which a folding bike generally exceeds, so it is up to the bus company; minibuses are not guaranteed either.

Is the Java NEO 20" suitable for a 180 cm rider?

Generally, yes. Jollymap's guide suggests the 20" for taller riders (for example over 180 cm), since the handlebar sits about 100 cm off the ground — about 7–8 cm higher than the 16" — giving a roomier position. The bike comes in one frame size and Java does not publish a recommended height range, so please contact us with your height and inseam before ordering.

What's the difference between the alloy fork and carbon fork versions?

The fork material. The carbon fork version takes weight off the front end and filters out fine road vibration, so your wrists tire less on long rides; it also has mounting holes on the side of the fork for adding accessories later. This alloy fork version gives a more direct road feel and suits riders who mainly ride short trips and want to start with the range's entry spec.

What does "406" mean?

406 is the rim's ETRTO size code — a bead seat diameter of 406 mm, the common 20" size. The Java NEO 16" uses 349 wheels (349 mm bead seat diameter), so tyres are not interchangeable between the two.

Is 9-speed enough?

For flat roads and ordinary hills, yes. Jollymap's guide says the 20" 9-speed gearing is more than enough for flats and typical inclines. If you want closer gear steps, consider the 12-speed electronic Java NEO 20 inch Electric Shift 12 Speed Folding Bike.

How should I wheel it when folded?

Push it forwards. Jollymap's guide warns that pulling a folded Java NEO backwards turns the cranks and pedals, which can jam a pedal against the wheel or frame.

How should I look after it in Hong Kong's humid weather?

After riding in the rain, wipe down the frame, folding joints and chain, and lubricate the chain regularly so rust doesn't affect shifting; store the bike somewhere dry. If the hydraulic brakes feel soft or lose power, have them checked promptly.

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