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Description
woom fahrrad 4 Woom Original 4 microSHIFT 20" BikeThe woom 4 introduces children aged six years to the world of gear shifting. The bike's seven speeds in combination with the easy to operate twist shifter expand the bike's range of use and increase the child's mobility. Whether they want to ride their bikes into the woods or up hills the new found freedom of gears makes longer adventures on two wheels child's play. An innovative and ultralight 20" children's bike with 7 gears designed for all round
The woom 4 introduces children aged six years to the world of gear-shifting. The bike's seven speeds in combination with the easy-to-operate twist shifter expand the bike's range of use and increase the child's mobility. Whether they want to ride their bikes into the woods or up hills – the new-found freedom of gears makes longer adventures on two wheels child's play.
An innovative and ultralight 20" children's bike with 7 gears designed for all-round use by children aged 6 years and over.
Age: 6 - 8 years
Height: 45 - 50″
Frame
- Made from light, high-quality AA 6061 aluminum material
- Geometrically designed with 20” wheels with agile and easy handling in mind
- Low entry, lower sitting position, and forgiving steering geometry provide control and comfort
- LEGGIE Kickstand pre-installed
Wheels
- Ultralight SOOPA DOOPA HOOPS aluminum rims
- Aluminum hubs with sealed bearings and mounts for woom click-on fenders
- Quick-release skewers for easy installation and removal
- 20 lightweight, stainless-steel spokes, double-crossed spoking
Tires
- 20 x 1.4″ Schwalbe Little Joe folding tires – woom edition
- High-quality, light tires for low rolling resistance and maximum grip
- Schrader (car-type) valves
- Reflective striping on tire sidewall for optimal visibility even in low-light conditions
Stem
- Lightweight stem made out of forged aluminum
- Adjustable height and reach mean the stem can be adjusted for optimal riding position as the child grows.
- Handlebars attached via two clamps and fixed with two 5 mm hex bolts
- Integrated headset bolt allows for easy compression adjustment
Handlebars
- Wide, ergonomically adapted, light aluminum bars offer more control
- Sandblasted and black anodized
- Width: 54 cm
Grips
- woom Ergogrip – designed specifically for kid’s hands
- Ergonomically formed gripping surface, non-toxic
- Handlebar ends with extra-large diameter for greater protection
- Screw-in grips ensure secure attachment to handlebars
Drive
- Lightweight, forged 4.3" (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
Gears
- 7 speeds
- microSHIFT MS29 twist shifter
- microSHIFT M21SS rear derailleur
Fork
- Light unicrown fork made out of aluminum
- 1″ shaft
- Generous trail angle for easy handling
Headset
- Fully integrated 1″ headset
- Sealed industrial bearings
- Integrated ahead clamp
Seat
- Ergonomically designed to fit children's pelvis
- Non-toxic
- Side protection to lean against walls
Seatpost
- Anodized aluminum seatpost
- Minimum insertion point marked, plus integrated guide in seat tube
Seatpost clamp
- Secure aluminum seatpost clamp eliminates risk of turning/twisting
- Extra-long quick-release skewer makes it easier for kids to release and close
Brakes
- Two independently operated V-brakes with braking power adapted for children
- Brake levers are ergonomically adapted, reach-adjustable, and suitable for kid’s hands
- High-quality Jagwire cables provide reduced friction and smooth performance
Enclosed tools
- 15 mm spanner for pedals
- 5 mm hex key for stem
Weight
- 7.7 kg / 16.9 lbs (without pedals)
Weight limit
- 155 lbs (70 kg)
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Exchange/Return Notes
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4.1 ★★★★★
Based on 523 reviews
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Product Reviews
★★★★★ 4
Missing some ToC Pages
Format: Paperback
Item shipped missing the first couple pages from the Table of Contents. Otherwise, it is as expected. Using as AD Services reference in Enterprise IT office for junior admins to reference.
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Reviewed in the United States on February 21, 2026
★★★★★ 5
A great read for those who want in depth knowledge about MS Active Directory & related services
Format: Paperback
Reviewer: 20 yrs training and consulting experience with Windows Server, Exchange Server, Active Directory, all major hypervisors, and cloud services. Active Directory along with all the related services and features are complex and many faceted topics. Books showing step by step examples are easy to come by, although not very useful since there’s plenty of Microsoft online help with the same info. What’s more important is to understand the features and related services and how to use them properly and securely.
This book covers in great detail Active Directory and the related services and features. There’s also plenty of information and expertise from a security perspective. With the move to cloud services and more employees are working from home there’s a whole new level of security issues to contend with. This book contains lots of in-depth explanations that allow you to understand why certain features and services exist and how to use them. This extra depth and the author’s experience is what makes this book special.
I would recommend this book for IT Professionals that already have some AD knowledge and experience. My only qualification is that I occasionally found some of the explanations confusing even after reading them over a several times.
I would highly recommend this book for those who wish to understand, configure and design an AD infrastructure along with associated services including OU design, group policy, object management delegation, ADFS, Certificate Services, etc. Although the book is not about Azure AD it does cover some aspects including integrating with on-prem AD.
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Reviewed in the United States on January 10, 2022
★★★★★ 5
Detailed coverage of Active Directory
Format: Kindle
I spent several years very close to active directory but haven’t followed developments in recent years. I was interested in this book as a refresher on what’s new in the last 8-10 years – and it did not disappoint.
The chapter on Advanced AD Management with PowerShell does a great job providing some background, setting the stage for why we’d want to know this, and providing some brief descriptions of various cmdlets that might be needed. My last experience with PowerShell/Active Directory required the Quest module, so seeing these native cmdlets is a nice change.
The chapter on AD FS is very detailed, providing a history of the functionality, deployment topologies and considerations, as well as details on configuring the required components. This is a topic I was not familiar with before seeing this book, and it did a good job bringing me up to speed on the feature.
I have not made it all the way through this book, but the sections I have completed are very good. If you are looking for a thorough reference guide on the current state of Active Directory, you should check out this book.
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Reviewed in the United States on December 8, 2021
★★★★★ 5
The book for designing and deploying Active Directory in your Organization
Format: Paperback
If you purchased an earlier release of this book and was wondering if this one is worth getting, the answer is yes!! The biggest change is this edition thoroughly covers the latest and greatest, Windows Server 2022. It walks through security issues, the differences between this and previous versions of Windows Server and how to design and deploy a functional and secure Server 2022 Active Directory. I enjoyed reading through this book and highly recommend it!
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Reviewed in the United States on February 4, 2022
★★★★★ 5
Comprehensive guide for IT Professionals interested in increasing their Active Directory Knowledge
Format: Paperback
Dishan Francis is a seasoned IT expert and six-time Microsoft MVP who has offered innumerable lessons learned through his experiences using Microsoft services. The Third Edition of Mastering Active Directory provides simple explanations of ideas accompanied by appropriate graphics to help the reader feel at ease while learning new concepts.
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Reviewed in the United States on January 31, 2022