Our warehouse clearout means 10% off all woom ORIGINAL bikes & KIDS helmets in sunny yellow & woom green!

woom OFF 4

An ultralight and durable 20" mountain bike (first generation, 2020 model) with a carbon fork, 9 gears and disc brakes designed for children aged 6 years and over.

Colour: black
incl. VAT plus shipping:
Size: 20″
Weight: 7.8 kg (17.2 lbs)
Top features: child-specific geometry, carbon fork, flip-flop stem

Age: 6 - 8 years
Height: 118 - 130 cm (3.87 - 4.3″)

No end of cycling fun

woom frame

The superlight aluminium frame with butted hydroformed tubes has a sporty geometry, long wheelbase and flat steering angle. The kink in the top tube makes it easy to dismount quickly in any situation.

woom carbon fork

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


The disc brakes with their excellent modulation combined with special brake levers designed for children's hands increase safety and control in all situations, including on rough terrain and in wet conditions.


The specially developed stem from forged aluminium guarantees maximum stiffness with minimal weight. Thanks to its flip-flop design it can be turned over and mounted upside down to adjust the handlebar height.

woom saddle

The saddle is one of the most important points of contact between the child and the bike. It significantly affects the feeling when riding. That is why we have designed our saddle to fit the pelvis of children and give them a slightly stretched riding position. Perfect for a unique riding experience!

During a recent redesign of our products, the security seatpost clamp shown here was replaced with a quick-release seatpost clamp. The result: quick and easy saddle height adjustments – no tools required. 


The precise and easy-to-operate gear system allows smooth shifting. The SRAM X5 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 high-quality Schwalbe mountain bike tyres with ADDIX SPEED rubber compound offer an ideal combination of low rolling resistance, maximum grip, good shock absorption and excellent durability.

Trigger shifter

The easy-to-use SRAM trigger shifter allows riders to shift smoothly and reliably through the nine gears using their thumb.

Sticker set

Pimp your bike! Every woom OFF is delivered complete with a set of stickers in four colours. Place them on your rims and top tube to personalise your bike!

Your OFF-road adventure can begin shortly!

Watch this video to find out how to assemble your woom OFF AIR, which tools you need, and how to set up the front suspension to suit your child.

Assembly instructions
Instructions for use

Find more information in our Service & Info area.