Woom ORIGINAL 4
Details
An innovative and ultralight 20" children's bike with 7 gears designed for all-round use by children aged 6 years and over.
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 make longer adventures on two wheels child's play.
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
- %[woom]% 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
Colors
- woom Red, Sky Blue, woom Green, Sunny Yellow, Purple Haze
Weight
- 7.7 kg / 16.9 lbs (without pedals)
Weight limit
- 155 lbs (70 kg)
Tire/wheel size
20?
Handlebar height
770 mm (30.32")
Steering angle
68º
Horizontal top tube length
442 mm (17.4")
Wheelbase
840 mm (33.1")
Seat tube angle
72º
Min. saddle height
570 mm (22.4")
Max. saddle height
725 mm (28.5")
Crank arm length
110 mm (4.3")
Handlebar adjustment
Individually adjustable
Stand-over height
495 mm (19.5")
Safety-Focused Brakes
With climbing big hills come big descents. The woom 4 comes with independently operated front and rear V-brakes to ensure that whether your Rider is bombing down that big hill they conquered or making their first forays off the pavement, they can always control the bike safely. The two V-Brakes are easy to operate thanks to their ergonomically adapted brake levers with reach adjustability.
woom Crank
The crank length and distance between the pedals are ergonomically adapted to fit children's bodies. This results in an optimum stance and very natural movements. And thanks to the chain guard those days of getting your pant leg caught are over!
Lightweight Aluminum Frame
Geometrically designed for kids six and up and forged of sturdy superlight aluminum, the frame is the heart of the bike. The low standover makes getting on and off the bike easy. The light weight means your Rider can go further, faster, and higher than ever before.
Easy-to-Use Gearing
As your child moves up from a single-speed to a geared bike, they will shift into a new level of biking. The woom 4’s seven-speed gearing in combination with the easy-to-operate twist shifter allows any Rider to conquer the biggest hill in their neighborhood. A narrow-wide chainring ensures minimal chain slippage, provides more control, and will have your Rider confidently cruising down the block.
Tailor-Made Wheels
The woom SOOPA DOOPA HOOPS are specially designed for the child-specific geometry on the woom 4 and feature our smooth, frictionless hubs and double-walled rims. The rims come with a 20 stainless steel spoke design to offer a perfect balance of strength and lightweight.
Ergonomic Contact Points
Comfort is very important to the riding experience, and that's why the contact points on our bike are made specifically for kids. Our saddle is designed to accommodate the anatomy and the biomechanics of growing Riders. Our grips are ergonomically designed for kids' hands. The pedals are durable, reflective, and slip-resistant.
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!
High-Quality Tires
The high-quality Schwalbe Little Joe tires provide plenty of traction and durability. The 20” diameter, 1.4? width tires allow your Rider to traverse both pavement and dirt with plenty of control. The reflective sidewalls of the tires give them further visibility on darker rides.
Adjustable Vario Stem
Kids grow fast and need a bike that adapts to them. The Vario stem is constructed of lightweight forged aluminum, making it quickly and easily adjustable. Our Vario stem allows your Rider to optimize their riding position as they become taller. By extending the reach of the handlebars, the life of the bike is also extended.
Part Numbers
| Option | UPC | MPN | Store SKU |
|---|---|---|---|
| Woom Red | 9120083721362 | 100028-0063-1002 | WOO22989366D |
| Woom Green | 9120083721379 | 100028-0063-2005 | WOO24255688D |
| Sky Blue | 9120083721386 | 100028-0063-3006 | WOO23563629D |
| Purple Haze | 9120083721393 | 100028-0063-4001 | WOO2527695D |
| Sunny Yellow | 9120083721409 | 100028-0063-5002 | WOO25337557D |
| Atomic Neon |
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