woom GO 4: Fully Equipped

woom GO 4: Fully Equipped

The superlight, versatile children's bike with 20″ wheels, a safety-conscious design, BMX-style bars, and seven easy-to-operate gears for kids aged 6 and up. Fully equipped models include a set of BEAM Bike Lights, SNAP Click-On Fenders, the GLUG Stainless Steel Bottle and bottle cage, the VIENNA Bell, and our best-selling POP Kids' Bike Basket. Kickstand included.

Be aware that the bike and accessories may arrive in two separate deliveries.

In stock & delivered in 2-3 business days
woom GO 4 US (Gen. H)
color: vibrant yellow
POP Kids' Bike Basket TOY
color: bubble gum blue
Price:$770.00list price $802.70

  • Lightweight for Easy Learning
  • Quick and Simple Assembly
  • Worry-Free 30 Day Returns
  • Built for Kids and Built to Last
Size: 20″
Weight: 17.2 lb
Top features: Child-specific shifting, ergonomic saddle, protective handlebar grips, BMX-style bars, handy quick-release skewer

Age: 6 – 8 years
Height: 45 - 51 in

Ready for New Adventures!

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
  • woom LEGGIE Kickstand pre-installed

Gears

  • 7 gears with a child-friendly gear indicator
  • Twist shifter: microSHIFT Ds45
  • Rear derailleur: microSHIFT M21SS

Fork

  • Lightweight aluminum unicrown fork
  • 1″ steerer tube
  • Generous trail angle for easy, well-balanced handling

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

Headset

  • Fully integrated 1″ headset
  • Sealed industrial-grade bearings
  • Integrated Ahead plug

Tires

  • 20 × 1.4″ Schwalbe Little Joe
  • High-quality, lightweight tires with low rolling resistance for maximum safety with minimum effort
  • Schrader (car-type) valves allowing the tires to be pumped up at gas stations
  • Reflective stripes for side visibility

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

Saddle

  • Ergonomic design
  • Durable, waterproof and weather-resistant material

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

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

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

Seatpost clamp

  • Made of aluminum
  • 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 mini V-brakes requiring minimal strength for maximum braking power
  • Ergonomic brake levers designed for small hands with short fingers and little strength
  • High-quality Jagwire Bowden cables with low friction for smooth performance

Included tools

  • 15 mm wrench for pedals
  • 4 mm hex key for stem

Colors

woom red, vibrant yellow, hot pink, metallic turquoise, metallic blue, powder pink

Weight

  • 17 lbs 3 oz

Weight limit

  • 155 lbs (70 kg)

Shipping dimensions

  • 42.1" x 33.5" x 9.4" (107 × 57 × 24 cm)

Sizing Chart

Model

Inseam

Height

woom GO 110"-14.4"31" - 40"
woom GO 1 PLUS14.8″ - 18.5″37″ - 43″
woom GO 216″ - 19.1″37″ - 43″
woom GO 319.1″ - 25.2″41″ - 47″
woom GO 422.1″ - 27.9″45″ - 51″

Unsure how to measure inseam? Can't decide between two sizes? Check out our What Size is Right?article.

Geometry

Product Variations

If you spot a difference between the product page and what you received, it’s likely due to a change in our supply chain. Our Customer Experience team is always here to answer any questions that you may have.

Assembly Instructions

You can set up your bike within 5 minutes. Ready? Let's go!

This video is your guide to assembling the woom GO 4 and making sure it's ready to roll for your child, including the tools you need.

Instructions for use

Find more information in our FAQ section.

Warranty Guarantee

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.

We have full confidence in our bikes, which is why we offer a 10-year warranty on the aluminum frames, rigid forks, bars and stem once you've registered online.

Register now!

Returns

30-Day Return Policy

If you buy a product directly from us that does not meet your expectations for any reason, you can return it within 30 days of the purchase. 

We will refund the full cost of the product and pay to have it shipped back to woom (US orders only). The refund for the cost of the product and return shipping cost will be processed within 5-10 business days of receiving the shipment.

Please note: We cannot refund the original shipping cost when you first purchased the product. Additionally, orders being returned from Canada will have to be shipped at the customer's expense.

To initiate a return and generate a return label, click here.

Product Variations

If you spot a difference between the product page and what you received, it’s likely due to a change in our supply chain. Our Customer Experience team is always here to answer any questions that you may have.

Frequently Bought Together:

READY Kids' Helmet
READY Kids' Helmet

Our bike helmet comes in 3 sizes for kids aged 1 to 14. The innovative design guarantees the perfect fit, all-round protection, and ease of use. It's also ideal for roller skating and scooters.

46–50 cm (XS) | 50–53 cm (S) | 53–57 cm (M)

18.2 - 19.6" (XS) | 19.7 - 20.8" (S) | 20.9 - 22" (M)

$89.90
BING Bell
BING Bell

Loud things come in small packages! Small but surprisingly powerful, this bicycle bell is the perfect way for kids to make themselves heard in traffic.
See our video in the image gallery for assembly tips.

$20.00
GLUG Stainless Steel Bottle
GLUG Stainless Steel Bottle

Clean taste, glug after glug. Meet GLUG, our bicycle water bottle made of premium toxin-free stainless steel. Each GLUG also comes with our unique kid-friendly side-loading bottle cage which fits all standard diameter bike bottles.

$24.00
SNAP Click-On Fenders
SNAP Click-On Fenders

Kids aren’t known for avoiding puddles, and now they don’t have to! Avoid mud-splattered shirts with the woom SNAP Click-On Fenders. These fenders are easy to install and are the perfect companion for wet roads and rainy commutes. Not only do they hug the radius of the tires, but also feature coverage of the tire sidewall for optimal splash protection. Compatible with all EXPLORE models, and GO and ORIGINAL models starting with woom 2.

$30.00
TENS Bike Gloves
TENS Bike Gloves

Our breathable cycling gloves designed to be easy for kids to put on, ensuring maximum grip on the handlebars and providing optimum protection for delicate little hands.
Sizes: 11,5 cm (5) | 13,5 cm (6) | 14 cm (7)

$19.90
POP Kids’ Bike Basket
POP Kids’ Bike Basket

The versatile, lightweight bike basket made from BPA-free, flexible material easily pops onto the handlebars. Designed exclusively for woom GO bikes (1 PLUS, 2, 3, and 4).

$39.90

Ratings & Reviews

4.70Based on 75 reviews
We love our WOOM bike

My son received a woom 4 as a gift for his 5th birthday. That was after he had learned to ride a bike without training wheels, his first more expensive bike. woom was recommended to us by friends because it is very light, has a great gear shift for learning how to shift gears and is also easy to resell in the end. These were the arguments that convinced us to buy. Unfortunately, my son grew so fast that we bought a woom 5 after just 10 months. We were sold the woom 4 very quickly at a good price and bought the woom 5 from a retailer in Hildesheim. All in all, we are very satisfied with everything and my son loves his blue woom 5.

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Great bike - super weight and quality

Our child loves the Woom 4 Go! The bike is super light, rides great and the switch to the gear shift was surprisingly quick. You can see the high-quality workmanship, and it's really fun even on longer trips. We would buy again anytime.

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A bike with no frills that does what it should!

The Woom GO 4 impresses us with its optimal geometry and resulting ergonomics for our children. It is easy and intuitive to use. The bike is pleasantly light and has a simple, functional design that is very appealing.

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Just Woom

Our son learned to ride a bike with Woom and since then he only wants a Woom bike.

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Best bike ever!

Without a doubt the best children's bike ever. It's stable, light and beautiful!

This review was written in exchange for a reward, such as a discount. The incentive was offered regardless of the rating or sentiment of the review.
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Our child loves his Woom GO 4

We have the Woom GO 4 and are very satisfied so far. The switch to the larger wheel size worked without any problems. We particularly like the low weight, which makes it easy for our child to handle the bike themselves. Even longer trips are fun because it is pleasant to drive. The workmanship makes a high-quality impression and the circuit is easy for children to use. The price may not be low, but the quality and driving pleasure justify it for us. Overall, a clear recommendation.

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Bye bye balance bike...

... and off you go for the first real bike! Our son is more of a “couch potato” type, but he has actually discovered cycling for himself. Until then, he didn't want to part with his balance bike, but switching to this bike actually worked — as you often hear! He has learned to ride a bicycle in less than ten minutes and would like to go on a trip every day. :D Clear purchase recommendation!

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Super bike but unfortunately no chain guard

It is a really good bike. We have already bought 5 Woom bikes and are always very satisfied. Unfortunately, this size does not have a chain guard, making other pants or skirts oily quickly.

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Absolutely top

Our “little one” can handle your 4-way zoom perfectly. She gets along great and has no problems with the corridors.

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Super stylish, lightweight and functional

Our daughter (7 years old) is absolutely delighted with her Woom bike. The color is beautiful and unisex, the gears are easy to use and the bike is relatively lightweight, which was particularly important to us as we live on the mountain. Our daughter goes all the way up the hill with it and has already been asked by passers-by if she had an engine, because it looks so effortless We would choose a Woom again and again (both children have been riding Woom bikes since the start of their cycling career) and can also recommend it.

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Great lightweight bike

We've been using woom right from the start. Our older daughter is very delicate. In the beginning, we had a heavier bike and therefore learning to ride was difficult. On recommendation, we bought woom and stuck with it. The bikes are lightweight and easy to ride. The children quickly learn how to handle everything correctly. We also really like the colors. Anytime again.

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Traveling with pleasure, our experience with the Woom 4

I absolutely love Woom 4! It is super robust, yet surprisingly light and easy to drive. Before that, my daughter had problems with other well-known bikes that were too heavy and cumbersome. Since we switched to Woom, she has really enjoyed cycling and doesn't want anything else. A clear recommendation for all parents who want to offer their children an easy, safe and fun bike. The customer service also deserves 5 stars. And lastly, it should not be forgotten that you can resell the Woom Super, which makes the high purchase price more than worthwhile

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A TOP bike for kids

Our grandson had wanted it for a very long time, after much deliberation, we granted him the wish and he received it. He was really happy, sat down on it and he did it super fast with the gearshift and likes to drive with it because it is also very easy. The little brother is already asking when he can ride a bike and is looking forward to the day when he gets it ☺️

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World championship five stars

My daughter had difficulty riding the balance bike she always wanted to, but it didn't work out. That's when I heard about Wurm. I bought her the balance bike and what can I say she got on and off that was five years ago. Since then, it's hard to imagine life without a worm wheel. We now drive the Wurm Vier on normal off-road routes and even on the pump track. My daughter loves it. I wouldn't buy anything else.

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Light and robust

Great lightweight children's bike, yet sturdy and sturdy. Our 6-year-old child is doing very well with it and thanks to the gearshift, you can go on really great bike rides. A rather expensive bike, of course, for which you have to buy accessories such as bells, stands, lamps separately. But overall very satisfied.

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