The superlight bike with 20″ wheels, a safety-conscious design, BMX-style bars and seven gears for kids aged 6 and up (115-130cm).
Ready for new adventures!
The time has come for your child to get to grips with the gears... yay! Shifting is so smooth on the woom GO 4 that bike life is about to get even better. From now on, you and your child will be able to set off on longer-than-ever expeditions with uphill or downhill stretches. A whole world full of new and exciting adventures awaits!
Innovative frame
The superlight aluminum frame is the heart of the bike. Its smart geometry with low entry and upright riding position allows your child to get on, ride and get off again safely. The long wheelbase and forgiving front-end geometry provide them with stability and guarantee a smooth ride.
Child-specific hand brakes
Your child won't struggle to bring their woom GO 4 to a stop even if their hands aren't very strong. That's down to the high-quality brake cables, the ergonomic brake levers and the small (but mighty) barrel adjuster that you can use to set the right distance between the brake lever and the handlebar grip for your child.
Protective handlebar grips
Our high-quality handlebar grips have a narrow diameter and an ergonomic design so your child can comfortably hold on with a good grip. The special material and extra large outer diameter keep your child safe, reducing the risk of them getting injured if they do happen to fall.
Ergonomic cranks
The length of the high-quality cranks and the distance between the pedals have been perfectly adapted to fit with children's bodies. This results in an optimum stance and natural movements that feel good. And there's no risk of your child getting their trouser leg caught thanks to the chainguard ring.
Intuitive twist shifter
Your child will get to grips with the gears in no time thanks to the easy-to-use twist shifter and the child-friendly gear indicator. They can shift to the next highest gear by twisting the shifter forward. And the little rider on the gear indicator will move toward the hare to show that your child is going faster. A twist back will shift the gear down again and the little rider will move toward the tortoise to show that your child is slowing down – perhaps because they're tackling a climb.
Handy quick-release skewer
The quick-release mechanism on the front wheel axle makes fast and easy work of dismounting and mounting the front wheel, so you can transport the woom GO 4 by car with no trouble at all.
Ergonomic saddle
The saddle has a major influence on the feel of the ride. And that's exactly why we carefully designed our saddle to suit the pelvis of children in the relevant age group and unlock ultimate comfort. Seriously – your child's ride couldn't be more comfortable!
Practical quick-release seatpost clamp
The quick-release seatpost clamp gives you – or even your child – a simple, quick and tool-free way to adjust the saddle height with perfect precision. On your pedals, get set, go!
All-round capable tires
Tires have a major influence on how a bike handles. That's why we've chosen tires that can be used on all kinds of terrain for the woom GO 4. Our lightweight tires will ensure maximum grip in any weather and on any surface so your child can confidently cover gravel, tarmac and dirt, riding in a straight line or taking corners along the way.
Bike fit guide on handlebars and seatpost
The ABC markings on the handlebars and seatpost make it easier for you to precisely adjust the woom GO 4 so the bike can grow with your child. Start by moving the saddle up or down so that your child can touch both feet to the floor and pedal comfortably. Match the handlebar marking to the seatpost and your child is good to go. How easy is that?!
| Frame | - | Lightweight, high-quality AA 6061 aluminum with butted tubes; Agile and easy handling: low entry, very low riding position and forgiving front-end geometry resulting in good control and more grins |
| Wheel size | - | 20" |
| Suitable for length | - | 115-130cm |
| Gears | - | 7 (1x7) |
| Fork | - | Lightweight aluminum unicrown fork; 1″ steerer tube; Generous trail angle for easy, well-balanced handling |
| Brake system | - | Two independently operated mini V-brakes requiring minimal strength for maximum braking power; Ergonomic brake levers designed for small hands with short fingers and little strengthHigh-quality Jagwire Bowden cables with low friction for smooth performance |
| Rear derailleur | - | microSHIFT M21SS |
| Shifters | - | microSHIFT Ds45 |
| Crankset | - | Lightweight, forged 110 mm aluminum cranks with narrow tread (Q-factor); Narrow-wide chainring with 28 teeth |
| Cassette | - | 11-28T |
| Headset | - | Fully integrated 1″ headset; Sealed industrial-grade bearings; Integrated Ahead plug |
| Stem | - | Superlight stem made out of forged aluminum; 40 mm/+15°; Recessed clamp bolts and sleek, rounded design making the stem extremely knee-friendly; Handlebars attached to the stem with two 5 mm hexagon socket bolts |
| Handlebar | - | Wide, ergonomic and lightweight aluminum bars for more control; BMX style with high rise for maximum adjustability; ABC marking for precise adjustment in relation to the saddle height; Sandblasted and anodized in black; Super narrow diameter grip, suitable even for very small hands; Width: 560 mm |
| Grips | - | Ergonomic design; Ultra slim, child-specific diameter to ensure good grip; Targeted comfort zone for ultimate hand-to-bar contact; Oversized ends for protection in the event of a crash; Lock-on grips with integrated anti-twist clamp |
| Rims | - | Ultralight aluminum rims |
| Front hub | - | Lightweight aluminum hubs with sealed bearings; fast installation and removal thanks to quick-release skewer; 20 lightweight, super strong stainless steel spokes, double-crossed spoking |
| Rear hub | - | Lightweight aluminum hubs with sealed bearings; installation and removal with 5 mm hex key; 20 lightweight, super strong stainless steel spokes, double-crossed spoking |
| Tyres | - | 20 × 1.4″ Schwalbe Little Joe; High-quality, lightweight tires with low rolling resistance for maximum safety with minimum effort; Reflective stripes for side visibility |
| Saddle | - | Ergonomic design; Durable, waterproof and weather-resistant material |
| Seat post | - | Anodized aluminum seatpost with visible minimum insertion mark; Integrated shim in the seat tube to stop scratching; ABC marking for precise adjustment of the saddle height in relation to the handlebars |
| Seat clamp | - | Made of aluminum; Long quick-release lever, easy to operate requiring only minimal strength; No risk of turning and/or twisting |
| Inner tubes | - | Car-type valves allowing the tires to be pumped up at petrol stations |
| Pedals | - | Narrow, flat platform plastic pedals; Sealed cartridge |
| Weight approx | - | 7,8 kg |
