Woom GO 4
Ready for new adventures! Are you ready to introduce your child to the world of gears? The woom GO 4 makes shifting unbelievably smooth, so biking will become even more fun. With this bike, you and your child can conquer...
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Ready for new adventures!
Are you ready to introduce your child to the world of gears? The woom GO 4 makes shifting unbelievably smooth, so biking will become even more fun. With this bike, you and your child can conquer longer and more thrilling routes, including challenging uphill and downhill sections. Get ready for a whole new world of excitement!
Specifications
Frame
Lightweight, high-quality AA 6061 aluminum with butted tubes
20″ wheels
Agile and easy handling: low entry, very low riding position and forgiving front-end geometry resulting in good control and more grins
Headset
Fully integrated 1″ headset
Sealed industrial-grade bearings
Integrated Ahead plug
handlebars
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
Drivetrain
Lightweight, forged 110 mm aluminum cranks with narrow tread (Q-factor)
Narrow-wide chainring with 28 teeth
Cassette with 11–28 teeth
Narrow, flat platform plastic pedals
Sealed cartridge
Gears
7 gears with a child-friendly gear indicator
Twist shifter: microSHIFT Ds45
Rear derailleur: microSHIFT M21SS
Tires
20 × 1.4″ Schwalbe Little Joe
High-quality, lightweight tires with low rolling resistance for maximum safety with minimum effort
Car-type valves allowing the tires to be pumped up at petrol stations
Reflective stripes for side visibility
Brakes
Weight Limit
70kg
Fork
Stem
Grips
Wheels
Ultralight aluminum rims
Lightweight aluminum hubs with sealed bearings
Front: fast installation and removal thanks to quick-release skewer
Rear: installation and removal with 5 mm hex key
20 lightweight, super strong stainless steel spokes, double-crossed spoking
Saddle
Ergonomic design
Durable, waterproof and weather-resistant material
Seatpost
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
Seatpost clamp
color
woom red, vibrant yellow, hot pink, metallic turquoise, metallic blue
Pickup & returns
Ride it through work
Employees and self-employed can lease bikes through o2o, Cyclis, b2bike, Lease a Bike or Joule. It's up to 40% cheaper than buying.
Questions
Riding in Brussels? Here's what people ask us most. Something else? Ask us.
Can I test ride before buying?
Yes. Come by the shop in Laeken, Tuesday to Saturday, and try the bikes we have in stock. Book a test ride to make sure your model and size are ready.
Which bike handles Brussels' hills and cobbles?
Brussels is hillier than it looks. For daily climbs, choose an e-bike with a mid-drive motor and wider tyres that cope with cobbles and tram rails. Tell us your route and we'll suggest the right motor, battery and gearing, then you can try it on a test ride.
How do I protect my bike against theft in Brussels?
Use two good locks, for example a frame lock plus a solid U-lock or chain attached to something fixed. Register your frame number with MyBike, and at home look for a secure bike box or bike parking in your commune. Ask us about locks and theft insurance when you buy.
Can I lease this bike?
Yes, through your employer or as self-employed via o2o, Cyclis, b2bike, Lease a Bike or Joule. It's up to 40% cheaper than buying. How leasing works.
Do I get a bike allowance for cycling to work?
Most employees who cycle to work are entitled to a bike allowance from their employer, electric bikes included. In 2026 it is tax-free up to €0.37 per km, capped at €3,690 a year. Your sector or company sets the exact amount.
What's the difference between an e-bike and a speed pedelec?
An e-bike assists you up to 25 km/h: no number plate, no licence, helmet recommended. A speed pedelec assists up to 45 km/h and needs a number plate, insurance, a helmet and an AM driving licence (a car licence includes it). Not sure which suits your commute? Ask us.
Is the bike ready to ride when I pick it up?
Yes. Our workshop assembles, checks and adjusts every bike to your size before you collect it at the Laeken shop.
Who services my bike after I buy it?
Our in-house workshop in Laeken. Bring your bike in for a check-up, repair or warranty question, and we deal with the brand for you.
Can I return my bike?
Yes, within 14 days. Read our returns policy.
Are pedals included?
We provide pedals so you can hit our test track right away. Need help finding the right pair? Foldable, griptape, freeride or clip-in: we've got them all.
Can I change parts or customize the paint?
Saddle, bars, tyres, wheels or a full custom paint job: bring your ideas and we make it happen.
Can I get a special offer, bundle or trade-in?
Ask us for a tailored offer, including a sweet deal on accessories or a trade-in of your old bike.
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