woom OFF 4

The new 20” woom OFF 4 provides off-road capability in a lightweight package with ergonomics that are designed specifically for children.

Color:  terra coppa
18.5 lbs
child-specific geometry, carbon fork, ergonomic saddle, disc brakes, tubeless-ready wheels, flip-flop stem
6 - 8 years
46 - 51″

Better OFF

Take your young Rider beyond the beginning stages of their mountain biking journey with the new 20” woom OFF 4! Stable, responsive, and equipped with high-performance components and tubeless-compatible rims and tires, it provides best-in-class value in its category.

The woom OFF 4 is happiest venturing down a gravel path, up a dirt mountain road, or on the MTB trail but will hold its own on any urban playground or paved path. Off-road capable, kid-tested and ergonomically designed for growing bodies!

Lightweight Aluminum Frame

The ultralight aluminum frame with butted hydroformed tubes has a long wheelbase, sporty geometry, and a slack steering angle. The bend in the top tube makes it easy to dismount quickly in any situation. 

Carbon Fork

Superlight and super stylish, the carbon fork offers maximum stability with minimal weight. Multidirectional carbon fibers ensure plenty of torsional strength when steering and braking. That makes the bike strong and stable even on the roughest terrain.

Ergonomic Contact Points

Comfort is important for the riding experience, and that's why the contact points on our bike are made specifically for kids. woom’s custom-sized saddles are unique to each model and designed to accommodate the biomechanics of young Riders. The tapered handlebar ends and custom grips are ergonomically designed for kids’ hands, with off-road riding in mind. The pedals are durable, reflective, and feature slip-resistant pins for extra traction.

Easily Adjustable

Thanks to its flip-flop design, the stem can be turned over and mounted upside down to adjust the handlebar height, helping assure the perfect hand position and fit. The quick-release seatpost clamp allows the saddle to be adjusted with ease while remaining secure. 


The precise and easy-to-operate SRAM X5 gear system has nine gears suitable for a wide range of gradients thanks to 28 teeth in the front and an 11-32 cassette in the back. The easy-to-use SRAM trigger shifter allows Riders to shift smoothly and reliably through the gears using their thumb and index finger.

Innovative Braking System

With their excellent modulation combined with special brake levers designed for a child’s hands, the hydraulic disc brakes increase safety and control in all situations, including on rough terrain and in wet conditions.

High-Quality Tires

The high-quality Schwalbe mountain bike tires with ADDIX SPEED rubber compound offer an ideal combination of low-rolling resistance, maximum grip, good shock absorption, and excellent durability.  Together, the OFF rims and Schwalbe tires are compatible to be set-up as a tubeless system.

Your OFF-road adventure can begin shortly!

In just a few steps, your woom OFF will be ready for its first ride. Check out this video to find out exactly what to do.

Assembly instructions
Instructions for Use

Find more information in our service and help area.