Woom GO 4 metallic blue
The Woom GO 4 is a superlight bike with 20″ wheels and a safety-conscious design for kids aged 6 years and up.
The time has come for your child to get to grips with the gears... yay! Shifting is so smooth on the Woom GO 4 that bike life is about to get even better.
From now on, you and your child will be able to set off on longer-than-ever expeditions with uphill or downhill stretches. 7-speed gears in combination with an easy-to-operate twist grip shifter expand the bike's range of use and increase the child's mobility.
Weighing in at only 7.8 kg (without pedals), the Woom GO 4 is a real lightweight.
A whole world full of new and exciting adventures awaits!

Innovative frame
A superlight aluminum frame is the heart of the bike. Its smart geometry with low entry and upright riding position allows your child to get on, ride and get off again safely. The long wheelbase and forgiving front-end geometry provide them with stability and guarantee a smooth ride.
Superlight = Superfun!

Child-specific brake levers
Your child won't struggle to bring their Woom GO 4 to a stop even if their hands aren't very strong. That's down to high-quality Jagwire Bowden brake cables, ergonomic brake levers and small (but mighty) barrel adjusters that you can use to set the right distance between the brake lever and the handlebar grip.

Protective handlebar grips
Woom's high-quality handlebar grips have a narrow diameter and an ergonomic design so your child can comfortably hold on with a good grip. The special material and extra large outer diameter keep your child safe, reducing the risk of them getting injured if they do happen to fall.

Ergonomic cranks with narrow Q-factor
The length of the high-quality cranks and the distance between the pedals have been perfectly adapted to fit with children's bodies. This results in an optimum stance and natural movements that feel good, so there's no risk of your child getting their trouser leg caught thanks to the chainring guard.

Twist shifter for intuitive shifting
Your child will get to grips with the gears in no time thanks to the easy-to-use twist shifter and the child-friendly gear indicator. They can shift to the next highest gear by twisting the shifter forward. The little rider on the gear indicator will move towards the hare to show that your child is going faster. A twist back will shift the gear down again and the little rider will move towards the tortoise to show that your child is slowing down – perhaps because they're tackling a climb.

Handy quick-release wheel skewer
A quick-release mechanism on the front wheel axle makes fast and easy work of dismounting and mounting the front wheel, so you can transport the Woom GO 4 by car with no trouble at all. Quick removal and installation of a wheel is also super helpful if you get a flat tyre.

Ergonomic saddle
The saddle has a major influence on the feel of the ride as it is one of the most important points of contact between the child and the bike. That's why Woom has carefully designed their saddle to suit the pelvis of children in the relevant age group and unlock ultimate comfort. Your child's ride couldn't be more comfortable!

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, ready, go!

All-round capable tyres
Tyres have a major influence on how a bike rides. This is why Woom has chosen Schwalbe Little Joe tyres. These high-quality, lightweight tyres are so grippy that your child can ride effortlessly and safely on any surface. They can confidently cover gravel, tarmac and dirt, riding in a straight line or taking corners along the way, due to their superior grip. A reflective stripe on the tyre sidewall ensures that your child is clearly visible, even in low-light conditions.

Bike fit guide on handlebars and seatpost
A-B-C markings on the handlebars and seatpost make it easier for you to precisely adjust the Woom GO 4 so the bike can grow with your child. Start by moving the saddle up or down so that your child can touch both feet to the floor and pedal comfortably. Match the handlebar marking to the seatpost and your child is good to go. How easy is that?
- Frame: Aluminium alloy / AL 6061 series / Butted tubes
- Fork: Aluminium alloy / Straight & slightly tapered leg
- Headset: Fully integrated threadless 1" alloy A-head / Industrial-grade sealed bearings
- Shifter: microSHIFT DS45 twist-grip / 1x7 speed
- Rear Derailleur: microSHIFT M21SS
- Freewheel: Cassette / 11-28T / 7 speed
- Chain: KMC
- Chainset: Woom 28T narrow-wide chainring / Woom forged 110mm alloy crank arms / Small-pitch Q-factor
- Chainguard: Single-sided aluminium
- Pedals: Woom non-slip narrow flat platform with reflectors
- Bottom Bracket: 3-piece crank system / Square taper / Sealed cartridge bearings
- Rims: Woom 'Soopa-Doopa-Hoops' superlight aluminium / 20H
- Front Hub: Woom 'HubCore' hollow alloy / Sealed bearings / Quick-release / 20H
- Rear Hub: Woom 'Hub 'N' Roll' hollow alloy / Sealed bearings / 5mm Allen hex bolt internal fixing / 20H
- Spokes: Stainless steel 14G
- Tyres: Schwalbe Little Joe Addix compound / 20" x 1 ⅜" / black with reflective stripe
- Front Brake: C-Star alloy linear pull V-type / Jagwire Bowden cables
- Rear Brake: C-Star alloy linear pull V-type / Jagwire Bowden cables
- Brake Levers: Alhonga junior alloy/resin with adjustable reach
- Handlebar: Sandblasted anodized aluminium / 560mm wide / Hi-rise BMX style / 22mm diameter / A-B-C markings
- Grips: Ergonomic design / Ultra-slim diameter / Targeted comfort zone / Oversized ends / Integrated lock-on anti-twist clamp
- Stem: Forged alloy A-head / 2-bolt recessed clamp bolts / 40mm extension / 15° rise
- Saddle: Ergonomic design / Waterproof and weather-resistant / Integrated GoPro mount
- Seatpost: Integrated anodized aluminium / Quick-release / 25.4mm diameter / 260mm length / Anti-scratch shim / A-B-C markings