woom ORIGINAL 4
An innovative and ultralight 20" children's bike with adjustable stem and seven gears designed for all-round use by children aged six years and over.
Gear it up!
The woom ORIGINAL 4 introduces children from the age of six to the world of gear-shifting and even bigger grins. With seven gears and an easy-to-operate twist shifter, this bike has a broader range of use, which takes your child's mobility to the next level. Whether they want to ride their bike into the woods or up hills – the new-found freedom of gears means that longer adventures on two wheels are on the cards.
Please note: This product does not include a bike bell, front light, rear light or wide-angle Z reflectors. If your child plans on cycling on public roads and streets, their bike may need to meet certain standard requirements before it can be considered legal in your country of residence. In many countries, bikes must be equipped with a bike bell, front and rear lights, and reflectors. We strongly suggest checking the legal obligations and guidance for cyclists in your country to make sure that your child's woom bike complies with the relevant road traffic regulations.
Frame
- Frame material: lightweight, high-quality AA 6061 aluminum with butted tubes
- 20″ wheels
- Agile and easy handling: low entry, very low riding position and forgiving steering geometry result in good control and more grins
Gears
- 7 speeds
- microSHIFT MS29 twist shifter
- microSHIFT M21SS rear derailleur
Fork
- Lightweight aluminum unicrown fork
- 1″ steerer tube
- Generous trail angle for easy, well-balanced handling
Wheels
- Ultralight SOOPA DOOPA HOOPS aluminum rims
- Aluminum hubs with sealed bearings and mount for woom click-on mudguards
- Quick-release skewers for easy installation and removal
- 20 lightweight, super strong stainless steel spokes, double-crossed spoking
Headset
- Fully integrated 1″ headset
- Sealed industrial-grade bearings
- Integrated Ahead plug
Tires
- 20 x 1.4″ Schwalbe Little Joe folding tires – woom edition
- High-quality, lightweight tires for good shock absorption, low rolling resistance and maximum grip
- Car-type valves allowing the tires to be pumped up at petrol stations
- Reflective stripes on the sides of the tires for maximum visibility even in low-light conditions
Stem
- Lightweight stem made out of forged aluminum
- Adjustable height and reach of stem offering an optimal riding position as the child grows
- Handlebars attached to stem with two clamps and fixed with two 5 mm hexagon socket bolts
Please note that as we work with various suppliers, the actual stem on your woom bike may vary slightly from the description given here.
Saddle
- Ergonomically designed to fit children's pelvises
- Side protection to lean against walls
Please note that as we work with various suppliers, the actual saddle on your woom bike may vary slightly from the description given here.
Handlebars
- Wide, ergonomically adapted and lightweight aluminum bars for more control
- Sandblasted and anodized in black
- Width: 540 mm
Seatpost
- Anodized aluminum seatpost with minimum insertion mark
Grips
- woom Ergogrips with a small, child-friendly diameter
- Ergonomically formed gripping surface
- Handlebar ends with extra large diameter for greater protection
- Screw-in grips for secure attachment to handlebars
Seatpost clamp
- Made of aluminum
- Extra-long quick-release lever, easy to operate requiring only minimal strength
- No risk of turning and/or twisting
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
Brakes
- Two independently operated V-brakes with braking power adapted for children
- Ergonomically adapted brake lever with reach adjustability
- High-quality Jagwire Bowden cables with low friction for smooth performance
Included tools
- 15 mm spanner for pedals
- 5 mm hex key for stem
Colors
- woom red, sunny yellow, woom green, sky blue, purple haze
Weight
- 7.7 kg (without pedals)
Weight limit
- 70 kg
Shipping dimensions
- 104 x 55 x 22 cm
Here's how your bike will arrive – set a 5-minute timer and let's go!
This video has a step-by-step guide to assembling your woom ORIGINAL 4 and making sure it's tip-top for your child, including the tools you need.
Assembly instructions
Instructions for use
Find more information in our Service & Info area.
Our woom bikes don't come with any additional accessories. You need to add optional extras like kickstands and mudguards on our equipment page.
If your child plans on cycling on public roads and streets, their bike may need to meet certain standard requirements before it can be considered legal in your country of residence. In many countries, bikes must be equipped with a bike bell, front and rear lights, and wide-angle Z reflectors. As rules for cyclists and their equipment vary from country to country, find out about the regulations applicable to riding a woom bike in road traffic in your country or region, particularly regarding the use of lights, reflectors and other obligatory safety equipment.
Innovative frame
The superlight aluminum frame is the heart of the bike, ensuring a fun and safe riding experience. Its cleverly designed age-specific geometry offers good control over the bike and gives young riders maximum safety while exploring new horizons.
Child-specific hand brakes
The two V-brakes are easy to operate thanks to their ergonomically adapted brake levers with reach adjustability, which makes them perfectly suited to children's hands. They also require minimal force to bring the bike safely to a stop.
Individually adjustable stem
With the flexibility of the adjustable stem, you can change not only the height of the bike but also its length to suit the rider. This means the bike grows with your child to ensure an optimal riding position at all times.
Please note that as we work with various suppliers, the actual stem on your woom bike may vary slightly from the images shown.
Cranks with a narrow Q-factor
The crank length and distance between the pedals have been ergonomically adapted to fit children's bodies. This results in an optimum stance and natural movements. There's no risk of your child getting their trouser leg caught thanks to the chainguard ring.
Twist shifter for intuitive shifting
The easy-to-operate microSHIFT twist shifter requires minimal hand strength, enabling young riders to shift intuitively through the seven gears.
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 your child's bike by car with no trouble at all.
Ergonomically formed saddle
The saddle is one of the most important points of contact between the child and the bike. It significantly affects the feeling when riding. That's why our saddle is designed to be a perfect fit for the pelvis of children in this age group and optimized for a slightly stretched-out riding position. Perfect for getting the most out of their ride!
Please note that as we work with various suppliers, the actual saddle on your woom bike may vary slightly from the images shown.
Practical quick-release seatpost clamp
The quick-release seatpost clamp offers a simple, quick and tool-free way to adjust the saddle height. It's even easy enough to be operated by children. 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 for a broad variety of terrain for our bikes. Whether your child is riding on tarmac, gravel or dirt, our lightweight tires will ensure maximum grip in any weather and on any surface, whether in a straight line or cornering.
Seven gears
The precise and easy-to-use gearing makes riding more fun and enables your child to go on longer rides without feeling overwhelmed. The microSHIFT derailleur has seven gears in a wide range 11–28T cassette combined with a 28T chainring up front.
The woom 10-year warranty*
Inspiring children to love riding their bikes is our mission at woom. That's why we guarantee the premium quality of every bike down to the last detail with innovative technology and long-lasting materials. In fact, we're so confident in our quality promise that we're offering to extend our warranty on frames, rigid forks, handlebars, stems and cranks from the usual two years to a full ten years – for free.
We have full confidence in our bikes, which is why we offer a 10-year warranty on the aluminium frames, rigid forks, bars and stem once you've registered online.
WARRANTY TERMS AND CONDITIONS
woom offers a 10-year manufacturer's guarantee on aluminium frames, rigid forks, handlebars and stem.
The initial activation of the 10-year warranty requires customers to register on the woom website within nine weeks from the date of purchase of a new woom bike upon submission of proof of purchase.
Provided that the bike has been registered properly, claims under the warranty must always be made via an authorised woom dealer (ideally the dealer that originally sold the bike) or through direct contact with woom if the bike was purchased from the woom online shop. To make a claim directly, send us an e-mail at [email protected] with the frame number, proof of purchase, proof of service (only required for used bikes) and photos or videos clearly showing the defect.
If a claim is made under the warranty, woom may choose to repair or replace any faulty parts at its own discretion. If a part cannot be replaced because the type, size or colour is no longer available, woom can provide a part regarded as a next-generation part to satisfy the claim made under the warranty. If a part or product is no longer being made at all or if no suitable spare part is available, woom reserves the right to exclude the warranty claim woom is under no obligation to provide original spare parts. No further claims can be made except for items expressly covered by this warranty. The warranty does not cover compensation for direct or indirect consequential damage. The buyer must cover any costs incurred for labour and/or postage and packaging costs.
The warranty is not extended or renewed when a claim is made under the warranty.
The warranty applies only to private end consumers. The warranty does not apply to end consumers using the products for their work, e.g. at a nursery or playgroup.
The guarantee applies internationally and can be transferred since it is tied to the product and not a person.
Legal warranty rights remain unaffected.
What is covered by the warranty?
| Components/products | Warranty duration |
Material defects and production faults with the frame, rigid fork, handlebars, stem | Ten years from the date of purchase* |
E-mountain bike battery (woom UP) | Two years from the date of purchase |
KIDS' Helmet | Two years from the date of purchase |
What is not covered by the warranty?
- Damage caused by crashes or accidents
- Suspension forks or suspension elements
- Components susceptible to wear and tear like LEDs, dynamos, chains, tyres, rims, brake pads, grips, hubs, headset and bottom bracket bearings, and cranks
- Damage to the paintwork
- Damage caused by improper use, e.g. freestyling, stunts and any other overuse
- Damage due to lack of care
- Improper repairs performed by third parties who are not authorised woom dealers
- Bikes that have had their frame numbers changed, removed or made illegible
- Changes made to the original bike design and the addition of parts that are not approved for use with the bike
If you buy a woom product and are not 100% satisfied, or if you didn't order the right size, you have 30 days to send it back to us free of charge from within the EU for either a refund or an exchange.
This also applies to your new woom bike, even if your child has already ridden it.
We will cover the return shipping costs and either refund the full amount you originally paid or send you a new bike in the requested size.
Everything you need to know about our cancellation policy can be found here.