woom GO 4 20-Inch Kids Bike Lightweight 7-Speed for Ages 6-8
- 20 inch wheels, 7 speeds
- 17.2 pounds, without pedals or kickstand
- 155 pound rider limit
- Twist shifter
- Two mini V-brakes, kid-sized levers
- Aluminum frame
- Ages 6 to 8
- Saddle height 22.4 to 28.7 inches
Last refreshed Jun 21, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A superlight geared beginner bike for children with kid-sized rim brakes and a twist shifter. It is sized for a narrow height band, so measure the child first.
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ASIN: B0FMRSJ7B2Model: GO 4Category: Kids' Bikes
Overview
Two independent mini V-brakes with kid-sized levers and a twist shifter on the gears form the controls of this lightweight beginner kids bike. The frame is aluminum with BMX style high rise bars.
Low weight, easy to reach brakes and a gear range make it forgiving to learn on. The limits are rim brakes rather than discs and the narrow fit window, which a growing child can pass quickly.
Who it's for
Families with a child building skills on two wheels and ready for gears fit this bike. Parents of taller children, or those wanting disc brakes, should choose a different size or model.
Pros and cons
- Superlight aluminum frame
- Kid-sized brake levers
- Twist shifter easy to use
- BMX style high rise bars
- Rim brakes only
- Narrow height range
- Weight excludes pedals and kickstand
- Included items not listed
Performance notes
Low weight makes the bike easy for a child to lift, steer and balance, and the upright position gives a clear view ahead. Two independent brakes let the child control each wheel, and a twist shifter changes gears from the grip.
Where it stands among kids' bikes
- #10 most-searched brand and model of the 22 kids' bikes lines we track (by search demand, not sales).
From the specs of the 156 kids' bikes we list; not a test result.
Specifications
| Brand | woom |
|---|---|
| Model | GO 4 |
| Dimensions & fit | |
| Wheel Size | 20 incheshigher than 62% of 142 kids' bikes |
| Weight | 17.2 pounds without pedals or kickstandlower than 100% of 49 kids' bikes |
| Maximum Weight Recommendation | 155 pounds |
| Rider height | 45 to 51 inches |
| Saddle height | 22.4 to 28.7 inches |
| Capacity & performance | |
| Number of Speeds | 7higher than 91% of 138 kids' bikes |
| Bicycle Gear Shifter Type | Twist |
| Age Range Description | 6 to 8 years |
| Construction & materials | |
| Frame Material Type | Aluminum |
| Other details | |
| Brake Style | Two mini V-brakes (rim brakes) |
| Rider inseam | 22.1 to 27.9 inches |
| Handlebar | BMX style high rise |
Closest rivals on specs
Frequently asked questions
What size child fits the woom GO 4?
The listing gives heights from 45 to 51 inches and inseams from 22.1 to 27.9 inches. The saddle adjusts from 22.4 to 28.7 inches.
Does the 17.2 pound weight of the woom GO 4 include pedals?
No. The listed weight is without pedals or kickstand.
Is the woom GO 4 geared?
Yes. It has seven speeds with a twist shifter.