Ready to ride
The bike is always professionally tuned and ready to go.
We will be happy to advise you
We provide expert advice on selection and configuration.
Free warranty inspection
Free warranty inspection after driving 200–500 km
Official TREK Store
Lifetime warranty on the frame, Crash Replacement, Carbon Care.
Durable and lightweight frame
The super-lightweight aluminum frame has a geometry specially designed for young cyclists with a low step-through and upright riding position. This makes it easy and safe for your child to get on and ride away. The longer wheelbase and tuned head tube angle provide excellent stability and guarantee a smooth ride.


Reliable brakes
Special ergonomic levers allow you to stop the bike safely with minimal effort. The distance between the brake levers and the handlebars can be adjusted using an adjustment screw.gt;
Rotary gear shift
The intuitive rotary gear shift with turtle and rabbit symbols makes it easier for children to transition to a bike with gears. The 7-speed derailleur allows children to handle riding on any terrain.


Grips with side protection
High-quality grips have a narrow diameter and ergonomic design. This ensures a firm grip even for small children's hands. The special material and extended outer ends protect the hands and reduce the risk of injury in the event of a fall.
Ergonomic saddle and quick-release saddle clamp
The saddle on the Woom GO 4 has been carefully designed to suit the size of children in the relevant age group, so your child can sit safely and comfortably. The practical quick-release clamp allows for easy and quick adjustment of the saddle height.


Easy seat adjustment
The seat post and stem are marked with the letters A, B, and C, making adjustment easy and precise so that the bike grows with your child. First, adjust the seat height, then adjust the angle of the stem so that the adjustment zone corresponds to the same letter on the seat post. It couldn't be easier!
High-quality tires
Lightweight Schwalbe tires can handle riding on gravel, asphalt, and light terrain. They have a reflective strip that makes your child visible even in low light.


Cleverly designed wheels
The Woom GO 4 comes with high-quality wheels that have been carefully designed down to the last detail – from smooth-running hubs to sturdy stainless steel spokes and lightweight aluminum rims.
Ergonomic cranks
The correct length of the high-quality cranks and the spacing between the left and right pedals are designed specifically for children's needs. The result is optimal posture and natural movement. Pedaling? A piece of cake!


Quick-release wheel mechanism
The quick-release mechanism on the front axle allows for quick and easy removal of the front wheel, so you can easily transport your bike by car.
Super lightweight children's bikes with many international awards.
A simple comparison illustrates how the weight of the bike is crucial to the enjoyment of riding: for a child to learn to ride a regular children's bike is the same as for an adult to learn to pedal and balance on a moped. We are convinced that it really isn't that simple.
- Front wheel: 20" ALU, industrial bearings, 20 spokes
- Rear wheel: 20" ALU, industrial bearings, 20 spokes
- Age: 6 - 8 years
- Frame: Woom GO 4, AA 6061
- Fork: Woom 20" ALU, 1"
- Cranks: Woom ALU Narrow, 110 mm, 28T
- Brakes: Woom V-brake
- Tires: Schwalbe Little Joe 20x1.4", reflective stripes on the sides
- Weight: 7.8 kg
- Pedals: Woom
- Cassette: 7-speed, 11-28
- Shifters: MicroShift Ds45, 7-speed, twist
- Rear derailleur: MicroShift M21SS, 7-speed
- Headset: Integrated, 1"
- Stem: Woom ALU, 40 mm, +15°
- Seat post: Woom ALU
- Saddle: Woom, ergonomic
- Handlebars: Woom ALU, 560 mm
- Grips: Extended ends, anti-rotation locks
- Child height: 115 - 130 cm
- Colors: Woom Red, Vibrant Yellow, Hot Pink, Metallic Turquoise, Metallic Blue
- Saddle height: 568 - 729 mm
- Weight limit: 70 kg
- Extras: Chainring guard
- Chain: KMC, 7-speed







