woom ORIGINAL 4

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.

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  • Free Returns
  • Money Back Guarantee
  • Free Shipping €99+
  • Two-year Warranty
  • Award-winning Design
Size: 20″
Weight: 7,7 kg (16,9 lb)
Top features: Adjustable stem, smooth gear shifting, handy quick-release skewers, Ergogrips

Age: 6 – 8 years
Height: 115 - 130 cm (3,8 - 4,3 in)

Gear it up!

Specifications

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

Geometry

Assembly instructions

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.

What's in the box?

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.

Features & highlights

All components that have been specifically designed with safety in mind bear the KIDSAFE PLUS seal.

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.

Guarantee information

Our standard 2-year warranty applies to the frame and components automatically from the day you purchase your woom bike. Members of our woom Riders Club can extend the warranty on aluminum frames, rigid forks, handlebars, stems and cranks to 10 years for free by registering their bike within 9 weeks of buying it.

Click here to join the woom Riders Club.

Click here to find out more about our extended warranty and to read the full terms and conditions.

Legal right to cancel goods & services

If you buy a woom product and are not 100% satisfied, or if you didn't order the right size, you have 30 days (WOW 60 days) to send it back to us free of charge from within the EU for a refund.

This also applies to your new woom bike, even if your child has already ridden it.
We will cover the return shipping costs and refund the full amount you originally paid.

Everything you need to know about our cancellation policy can be found here.

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Ratings & Reviews

4.00Based on 187 reviews
Awesome!

We've had the Woom two, three and now four. I must admit, I had drafted a review on this bike in advance of my daughter fully using it, expressing my concerns about the shifter noted in other reviews. I will say though I am nothing but incredibly impressed by this bike. My daughter loves every aspect of it, including rifling through the gears with ease (her favorite gear is 5) and clinging the bell with a big smile on her face. What a machine! Nice job, Woom!

2 people found this helpful
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Woom should upgrade those who have the problematic shifter

Two, three and now four. Great bike, but the shifter....Woom should upgrade those who have the problematic shifter. Even just send the upgraded shifter for those that wish to install.

1 person found this helpful
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Woom original 4

Unfortunately, this is the second bike we have bought from Woom where the front break rubs again the tire constantly. The front tire is not straight, I tried to file a complaint online but when trying to submit it after downloading all the photos and video, the submit tab would not work. Extremely frustrated with this whole experience. I will not purchase another bike from WOOM.

1 person found this helpful
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Great bike, but why putting gears on it if you use twist shifter that are too difficult for a kid to twist

This bike is great overall... but the micro shift M29-7 twist shifters are horrible. I have a hard time twisting them with a stronger adult hand. who thought that was a good idea? Its not an adjustment or lubrication issue the shifters are just junk.

2 people found this helpful
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great!

My son learned to ride without assistance on this bicycle

1 person found this helpful
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Great bike

Great bike, light weight and fashionable

1 person found this helpful
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Received defective product. Also the gear shifting feedback is real.

I received a defective front wheel which I will be following up with separately. Want to second the feedback on gear shifting. My 7 year old son cannot shift to gears 1-3 unassisted, I find this unacceptable for a kids bike. I'll look into returning it.

Reply fromwoom

We truly appreciate your honest input —it helps us continually improve our bikes and create better riding experiences for families like yours. We’re happy to share that we’ve refined the shifting on our new woom GO 4 model. The new twist shifter is much easier for kids to actuate and even includes an intuitive gear indicator that makes it easy for kids to learn. Learn more here: https://woom.com/en_US/products/go-4-kids-bike?variant=woom-red

1 person found this helpful
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Great for learning to ride / no issues with shifting

This bike was perfect for my son when he learned to ride. Before this bike he only really wanted to scooter and when he did want to learn to ride we picked the Woom 4. He was 6.5 years old and it took him about 30 minutes to get riding. Some friends didn't have the same experience and I think it was easier for our son becuase the bike is so light and easy to ride. He is now 8 years old and still using the same bike which is really nice. I think he probably still has at least another summer that he can get out of it. There have been no issues with the shifter on our end.

1 person found this helpful
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A great first real bike

We chose this Woom bike after being introduced to Woom by neighbor kids who were loving theirs. Our daughter was comfortable on her strider bike, & she was ready to move up to pedals. Her new Woom bike is exactly the right step up! It’s solid & well-designed. The brakes & shifting work smoothly, & she has joyfully learned to use them.

1 person found this helpful
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She LOVES her bike!

This is our second WOOM bike and I love that it’s lightweight to carry when she’s tired and doesn’t wanna ride anymore. There’s nothing to complain about except for the micro shifter (she just turned 5 when we got the bike). She could not get the hang of it and I called Woom and spoke to their customer service department and they were awesome. We got switched out to an easier shifter and it seems to be working out a lot better.

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New micro shifter is terrible

Our family has the woom 2, 3, and we just purchased the 4. My 6-year-old rode his cousins woom 4 and was absolutely flying and loving the gears. But I didn't realize was they don't sell the old gearing system anymore and the replacement micro shifters are absolutely terrible. They don't budge for him going into lower gears. As an adult I'm able to twist them myself but they leave my hands hurting. Woom should not be selling this shifting system. It's actually hurting their brand at this point. The whole reason we purchased a Woom 4 (for $600!) is to just know that we are getting the best possible bike for our 6-year-old. That is no longer a safe assumption. Woom needs to address this immediately and head on and stop selling this version. Otherwise their brand will suffer. if I can't get this working for my 6 year old, then I will be returning the bike and looking at other options.

Reply fromwoom

We truly appreciate your honest input —it helps us continually improve our bikes and create better riding experiences for families like yours. We’re happy to share that we’ve refined the shifting on our new woom GO 4 model. The new twist shifter is much easier for kids to actuate and even includes an intuitive gear indicator that makes it easy for kids to learn. Learn more here: https://woom.com/en_US/products/go-4-kids-bike?variant=woom-red

1 person found this helpful
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Require an upgrade after purchase

As a happy ower of woom 3 bike. I was really looking forward to get the next model. It looked very promising with shifting gears... Once we received the bike we found that it's ABSOLUTELY impossible to change gears for 5 years old kid. I found an another type of shifter that is kids friendly and you change gears with you thumb and installed it. So the bike is great again. It's just I didn't expect that I'll have to improve it by myself

Reply fromwoom

We truly appreciate your honest input —it helps us continually improve our bikes and create better riding experiences for families like yours. We’re happy to share that we’ve refined the shifting on our new woom GO 4 model. The new twist shifter is much easier for kids to actuate and even includes an intuitive gear indicator that makes it easy for kids to learn. Learn more here: https://woom.com/en_US/products/go-4-kids-bike?variant=woom-red

1 person found this helpful
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Don't buy it

We loved our Woom 2, but the shifter on the woom 4 is too hard to my son or any child to change when riding. Its really frustrating that he has to stop before each hill, get off the bike, and change the gear. We took to a bike shop and they said there is nothing they can do and it is functioning as designed.This bike cost way too much money for them not to address this fundamental issue. This major flaw in the bike is causing my son to to not like bike riding with me as much anymore, don't buy the bike.

Reply fromwoom

We truly appreciate your honest input —it helps us continually improve our bikes and create better riding experiences for families like yours. We’re happy to share that we’ve refined the shifting on our new woom GO 4 model. The new twist shifter is much easier for kids to actuate and even includes an intuitive gear indicator that makes it easy for kids to learn. Learn more here: https://woom.com/en_US/products/go-4-kids-bike?variant=woom-red

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Woom family for years to come!

We have been a woom family for years and love them! My youngest took off on their innovative design before she was 3. She is 5 now and loves having gears. This summer has allowed our family to explore trails and hills like before having kids, but now the kids are leading the way.

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Don’t buy (it if you want to use the shifter)

We started on the woom 2 and 3 bikes and had a great experience. Buying a woom 4 was a no brainer but what a mistake. The day it came I thought it was broken. The shifter mechanism is so tight it takes a lot of effort for a grown man to move it through all the gears. My daughter stands no chance. The bike itself is good quality just like the 2 &3 but for the price and overall quality you expect it is absolutely not worth it. I reached out to woom the day it was delivered and they advised me to go get the shifter replaced and they would cover the cost up to a certain amount … maybe $100?Not impressed with the response or how they treat it like it’s my issue to get fixed, on my time, right out of the box.

Reply fromwoom

We truly appreciate your honest input —it helps us continually improve our bikes and create better riding experiences for families like yours. We’re happy to share that we’ve refined the shifting on our new woom GO 4 model. The new twist shifter is much easier for kids to actuate and even includes an intuitive gear indicator that makes it easy for kids to learn. Learn more here: https://woom.com/en_US/products/go-4-kids-bike?variant=woom-red

1 person found this helpful
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