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Description
Superlight First-Gears Bike with Easy Twist Shifting and BMX-Style Control
The woom GO 4 is built for young riders aged 6 and up who are ready to learn gear shifting and tackle longer adventures. At just 7.8 kilograms, this 20-inch bike delivers lightweight handling with easy-to-use twist shifting, so kids can focus on riding rather than struggling with complicated mechanics. Child-specific geometry with an upright riding position and forgiving steering gives riders the confidence to explore neighborhood streets, parks, and gentle trails.
Every component is purpose-designed for emerging gearshifters: BMX-style handlebars for confident control and a playful "rabbit and turtle" gear indicator that makes learning intuitive, a child-friendly saddle for growing riders, narrow grips that fit smaller hands, and lightweight mini V-brakes that require minimal force to stop. The open-bottom seat tube design allows extended saddle adjustability with ABC marking guides, so this bike grows with your child. Quick-release front wheel and practical seatpost clamp make adjustments and transport straightforward for parents and riders alike.
Ready to Learn Gears and Explore
- Lightweight at 7.8 kg for easy handling and confidence-building
- Child-specific geometry with low entry and upright riding position for natural control
- 7-speed microSHIFT Ds45 twist shifter with child-friendly gear indicator (rabbit for faster, turtle for slower)
- MicroSHIFT M21SS rear derailleur with 11–28 tooth cassette for smooth gear changes
- Two independently operated mini V-brakes requiring minimal hand strength for stopping
- Lightweight Schwalbe Little Joe tires with reflective sidewall stripes for visibility and low rolling resistance
- Aluminum frame with butted tubes for lightweight strength and precision handling
- BMX-style handlebars for intuitive control and confident handling
- Ergonomic saddle designed for the 6–8 age group, water-resistant and durable
- Narrow, ergonomic grips protect small hands and absorb impact
- Quick-release front wheel for easy removal and compact storage
- ABC marking guide on stem and seatpost for correct fit adjustments as the rider grows
- Sealed bearing headset and hubs for smooth, quiet operation in all conditions
- Pre-installed woom LEGGIE Kickstand included with base bike
- Compatible with woom accessories including SNAP Click-On Mudguards and PICKUP Rack
- Available in matte finishes: woom red, vibrant yellow, hot pink, metallic turquoise, and metallic blue
Details
Size Information
Finding the Right Size
The most accurate way to size a Woom is by your child's inseam — not their age. Here's how to measure:
Have your child stand straight against a wall in their riding shoes. Place a hardcover book between their legs, spine up, with gentle pressure like a bike saddle. Mark the top of the spine on the wall, then measure from the floor to the mark. That's the inseam in inches.
Woom Road & Street
| Model | Inseam (in) | Height (in) |
|---|---|---|
| Woom 1 | 10.0 – 14.4 | 31 – 40 |
| Woom 1 PLUS | 14.8 – 18.5 | 37 – 43 |
| Woom 2 | 16.0 – 19.1 | 37 – 43 |
| Woom 3 | 19.1 – 25.2 | 41 – 47 |
| Woom 4 | 22.1 – 27.9 | 45 – 51 |
| Woom 5 | 26.4 – 32.3 | 49 – 57 |
| Woom 6 | 29.5 – 37.4 | 55 – 65 |
Woom OFF (Mountain)
| Model | Inseam (in) | Height (in) |
|---|---|---|
| OFF 4 | 22.8 – 28.7 | 46 – 51 |
| OFF 5 | 27.8 – 33.7 | 50 – 57 |
| OFF 6 | 30.3 – 37.8 | 55 – 65 |
Woom OFF AIR (Full Suspension)
| Model | Inseam (in) | Height (in) |
|---|---|---|
| OFF AIR 4 | 22.8 – 28.7 | 46 – 51 |
| OFF AIR 5 | 28.3 – 34.3 | 50 – 57 |
| OFF AIR 6 | 30.7 – 38.2 | 55 – 65 |
Woom UP (E-Mountain)
| Model | Inseam (in) | Height (in) |
|---|---|---|
| UP 5 | 28.0 – 33.5 | 50 – 57 |
| UP 6 | 30.9 – 37.4 | 55 – 65 |
Woom Now (Urban)
| Model | Inseam (in) | Height (in) |
|---|---|---|
| Now 4 | 22.1 – 27.9 | 45 – 52 |
| Now 5 | 26.4 – 32.3 | 49 – 58 |
| Now 6 | 29.5 – 37.4 | 56 – 66 |
UPC / Part Numbers
| Option | SKU | UPC |
|---|---|---|
| Hot Pink | 100885-0000-4005 | 9120083729207 |
| Metallic Blue | 100885-0000-3010 | 9120083729191 |
| Metallic Turquoise | 100885-0000-2008 | 9120083729184 |
| Vibrant Yellow | 100885-0000-5007 | 9120083729214 |
| Woom Red | 100885-0000-1002 | 9120083729177 |
| Powder Pink | 100885-0000-4009 | — |
