Gear it up!
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)
Shipping Details
- Box dimensions: 43.7” x 23.2” x 6.9”
Woom Kids' Bikes Size Information
Here's how to measure your child's inseam as accurately as possible:
- Have your child stand up straight against a wall wearing the shoes and pants likely to be worn while riding a bike.
- Take a hardcover book and place the spine of the book (facing upward) at your child’s crotch using the same slight pressure that would be applied by a bike saddle while riding.
- Mark the edge of the book's spine on the wall in pencil.
- Measure the distance from the floor to the marking as vertically as possible using a measuring stick or tape measure — this is your child’s inseam measurement in inches.
- Compare the measurement with the minimum inseam lengths in the table below.
| Model | Rider's Inseam Range (inches) | Rider's Height Range (inches) |
|---|---|---|
| Woom 1 | 10.0 - 14.4 | 31 - 40 |
| Woom 1 PLUS | 14.8 - 18.5 | 37 - 43 |
| Woom 2 | 16.0 - 19.1 | 37 - 43 |
| Woom 3 | 19.1 - 25.2 | 41 - 47 |
| Woom 4 | 22.1 - 27.9 | 45 - 51 |
| Woom 5 | 26.4 - 32.3 | 49 - 57 |
| Woom 6 | 29.5 - 37.4 | 55 - 65 |
| Woom OFF 4 | 22.8 - 28.7 | 46 - 51 |
| Woom OFF 5 | 27.8 - 33.7 | 50 - 57 |
| Woom OFF 6 | 30.3 - 37.8 | 55 - 65 |
| Woom OFF AIR 4 | 22.8 - 28.7 | 46 - 51 |
| Woom OFF AIR 5 | 28.3 - 34.3 | 50 - 57 |
| Woom OFF AIR 6 | 30.7 - 38.2 | 55 - 65 |
| Woom UP 5 | 28.0 - 33.5 | 50 - 57 |
| Woom UP 6 | 30.9 - 37.4 | 55 - 65 |
| Woom Now 4 | 22.1 - 27.9 | 45 - 52 |
| Woom Now 5 | 26.4 - 32.3 | 49 - 58 |
| Woom Now 6 | 29.5 - 37.4 | 56 - 66 |