woom OFF 4
The ultralight, durable 20" mountain bike (model year 2021, first gen) with a carbon fork, 9 gears and disc brakes designed for children aged 6 years and over.
Endless off-road fun!
The first-generation woom OFF 4 (model year 2021) gives children aged six years and older a superlight and durable mountain bike for their first go on the pump track and easy cruising through forests and fields. The kink in the top tube makes it easy to get on and off quickly in any situation, thereby giving kids greater safety out and about on the trails. The perfect introduction to mountain biking.
Frame
- Frame material: lightweight, high-quality 6061 T6 aluminum with butted and hydroformed tubes
- 20″ wheels
- Confidence-inspiring handling: low entry, low center of gravity and long wheelbase provide good balance and make for a fun, safe ride
Gears
- 9 gears
- SRAM X5 trigger shifter
- SRAM X5 rear derailleur
Fork
- Lightweight carbon fork
- 1 1/8″–1″ baby taper steerer tube
- 100 x 15 mm thru-axle
- Post mount for disc brake
Wheels
- Superlight woom OFF DISCO TEC double-chamber aluminum rims
- Aluminum hubs with sealed industrial-grade bearings
- Thru-axles for maximum torsional strength (100 x 15 mm front/135 x 12 mm rear)
- 20 G14 spokes, double-crossed spoking
- Aluminum nipples
Headset
- Fully integrated 1 1/8″–1″ headset
- Sealed industrial-grade bearings
Tires
- 20 x 2.25″ Schwalbe Rocket Ron with ADDIX SPEED rubber compound
- Quality MTB tires with low rolling resistance, maximum grip, good shock absorption and excellent durability
- Car-type valves allow the tires to be pumped up at petrol stations
Stem
- Forged aluminum
- CNC-machined
- Handlebars attached via two clamps
- +/-15° flip-flop design to adjust handlebar height
- Length: 50 mm
Saddle
- Ergonomically designed to fit children's pelvises
- Side protection for leaning against walls
Handlebars
- Wide, ergonomically adapted and lightweight aluminum bars for more control
- Sandblasted and anodized in silver
- Width: 580 mm
- Rise: 20 mm
Seatpost
- 27.2 x 250 mm
- Anodized aluminum seatpost with minimum insertion mark
Grips
- Child-friendly thanks to small diameter
- 100% silicone for maximum grip
- Screwed-in end plugs
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 11–32 teeth
- Platform pedals made from fiber-reinforced nylon
- Cr-Mo axle and sealed industrial-grade ball bearings
Brakes
- Hydraulic disc brakes by Promax
- Rotor diameter front/back: 140/140 mm
- Ergonomic brake levers designed for children's hands
Included tools
- 4 mm hex key for stem and seatpost clamp
- 8 mm hex key for front wheel and pedals
Weight
7.8 kg (without pedals)
Weight limit
80 kg
Colors
- Black
Shipping dimensions
- 112 x 64 x 23 cm
Your OFF-road adventure can begin shortly!
In just a few steps, your woom OFF will be ready for its first ride. Check out this video to find out exactly what to do.
Assembly instructions
Instructions for use
Find more information in our Service & Info area.
woom Frame
The superlight aluminum frame with butted hydroformed tubes has impeccable MTB genes with modern geometry, a long wheelbase and a slack head tube angle.
The kink in the top tube makes it easy to dismount quickly in any situation.
woom Carbon Fork
Superlight and super stylish – the carbon fork offers maximum stability with minimum weight. Multidirectional carbon fibers ensure plenty of torsional strength when steering and braking. That makes the bike strong and stable even on the roughest terrain.
Brakes
The easy-to-modulate disc brakes ally with the special brake levers designed for children's hands to increase safety and control in all situations, including on rough terrain and in wet conditions.
Stem
Specially developed from forged aluminum, the stem pairs the ultimate stiffness with the lowest possible weight.
Thanks to its flip-flop design, there’s the option to raise the height of the bars simply by inverting it.
woom 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 is why we have designed our saddle to fit the pelvis of children and give them a slightly stretched riding position. Perfect for getting the most out of their ride!
During a redesign of our products, the security seatpost clamp shown here was replaced with a quick-release seatpost clamp. The result: quick and easy saddle height adjustments – no tools required.
Gears
Smooth shifting comes courtesy of our precise and easy-to-operate transmission. The SRAM X5 drivetrain has nine gears and a wide range 11–32T cassette combined with a 28T chainring up front.
Tires
Built with the ADDIX SPEED rubber compound, the valued Schwalbe mountain bike tires deliver the ultimate performance, uniting a low rolling resistance with superior grip, cushioning and durability.
Trigger shifter
The easy-to-operate SRAM trigger shifter makes light work for children’s thumbs by shifting efficiently through the nine gears with precision.
Sticker Set
Ride in style! Every woom OFF is delivered complete with a set of stickers in four colors. Personalize your rims and top tube to ride in your unique style!
Our woom bikes don't come with any additional accessories. You can find useful extras, including kickstands and mudguards, in our online shop.
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.
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.