The woom GO 4 is designed for children who are ready to add gears to their riding and explore longer, more varied routes. Its lightweight aluminium frame and 20in wheels combine with a low riding position for agile, reassuring control.
Seven-speed microSHIFT gearing uses a child-friendly twist shifter and gear indicator, making it easier for young riders to learn when and how to change gear. Schwalbe Little Joe tyres keep rolling resistance low while retaining useful grip and reflective sidewalls for visibility.
Independent mini V-brakes, small-hand levers and slim ergonomic grips make the controls easier to manage. A quick-release front wheel, adjustable cockpit and clearly marked seatpost add practical convenience for growing riders and family transport.
Features & Benefits:
- Child-Friendly Seven-Speed Gearing: A microSHIFT twist shifter and clear gear indicator help young riders learn gear changes on climbs and varied terrain.
- Lightweight, Balanced Handling: The aluminium frame, low riding position and 20in wheels are designed for easy control as rides get longer.
- Easy-to-Use Braking: Independent mini V-brakes with ergonomic levers provide straightforward front and rear speed control for smaller hands.
Full Specification:
- Frame: Lightweight AA 6061 aluminium with butted tubes; 20in wheels
- Fork: Lightweight aluminium unicrown fork; 1in steerer
- Number of Gears: 7
- Gear Shifters: microSHIFT DS45 twist shifter with gear indicator
- Chainset: Forged 110mm aluminium cranks
- Chainrings: 28T narrow-wide
- Rear Cassette: 11-28T
- Rear Derailleur: microSHIFT M21SS
- Bottom Bracket: Sealed cartridge
- Pedals: Narrow flat-platform plastic pedals
- Rims: Ultralight aluminium rims; 20 stainless-steel spokes
- Front Hub: Lightweight aluminium hub with sealed bearings and quick-release skewer
- Rear Hub: Lightweight aluminium hub with sealed bearings
- Front Tyre: Schwalbe Little Joe 20 x 1.4in
- Rear Tyre: Schwalbe Little Joe 20 x 1.4in
- Brakes: Two independently operated mini V-brakes with ergonomic child-specific levers
- Handlebars: Lightweight aluminium BMX-style bars; 560mm width
- Grips or Bar Tape: Slim ergonomic lock-on grips with protective oversized ends
- Headset: Fully integrated 1in headset with sealed bearings
- Stem: Forged aluminium, 40mm, +15 degrees
- Saddle: Ergonomic, waterproof and weather-resistant saddle
- Seatpost: Anodised aluminium with adjustment marking
- Inside Leg or Age Range: 6–8 years
- Weight: 7.8kg without pedals
Manufacturers reserve the right to change specifications without notice based on availability at the point of assembly.
Information for woom kids' bike range:
Child-specific geometry – Lightweight frames, low riding positions and child-friendly geometry make woom bikes easy to handle, helping young riders feel stable and confident.
Child-specific cranks – Proportionally sized cranks and a narrow pedal position encourage a natural, comfortable and efficient pedalling motion.
Smaller grips – Slim ergonomic grips are designed specifically for smaller hands, providing comfortable and secure control.
Child-specific brakes – Easy-reach brake levers require little hand strength, making braking safer and easier for young riders.
Steering limiter [Selected smaller models] – Helps prevent the handlebars from turning too far, reducing the risk of over-steering while children develop their bike-handling skills.
Easy-to-use gears [Geared models] – Child-friendly shifting controls make changing gear simple and intuitive for developing riders.
Size Chart for woom Go Bikes
| Go 2 | Go 3 | Go 4 |
| Tyre/wheel size | 14" | 16" | 20" |
| Cockpit/handlebar height | 628mm (22.7") | 698mm (27.5") | 803mm (31.6") |
| Steering angle | 68º | 68º | 68º |
| Horizontal top tube length | 360.5mm (14.2″) | 407.1mm (15″) | 441.9mm (17.4″) |
| Wheelbase | 641mm (25.2″) | 711.2mm (28″) | 840mm (33.1″) |
| Seat tube angle | 68º | 68º | 72º |
| Minimum saddle height | 394mm (15.5″) | 482mm (19″) | 568mm (22.4″) |
| Max. saddle height | 489mm (19.3″) | 637mm (25.1″) | 729mm (28.7″) |
| Crank arm length | 80mm (3.2″) | 95mm (3.7″) | 110mm (4.3″) |
| Handlebar adjustment | +/-10° | +/-10° | +/-10° |
| Standover heigh | 350mm (13.8″) | 410mm (16.1″) | 490mm (19.3″) |
Warranty Information for woom:
woom offer a standard 2-year warranty that applies automatically from the day you buy a new woom bike. You need to provide the purchase receipt to make a claim under the warranty. Make sure you keep it somewhere safe.
Members of the woom Riders Club can extend the standard 2-year warranty on aluminum frames, rigid forks, handlebars, stems and cranks to 10 years for free. Log into the woom Riders Club here and register your woom bike within 9 weeks of buying it.
The 2-year and 10-year warranties can be transferred to you when you buy a used bike. The warranty period still applies from the date on which the bike was purchased as new.
Click here to find out more and to read the full warranty terms and conditions.