Woom

Woom OFF 4

Minimal weight. Maximum fun.

The woom OFF 4 (second generation, 2023 model) is an ultralight and durable 20" mountain bike, built for young riders aged 6 to 8 years and 118 - 130 cm tall. Weighing just 8.1 kg, it features a carbon fork for added strength and agility, 9 gears for tackling varied terrain, and disc brakes for maximum stopping power. Designed with child-specific geometry, an ergonomic saddle and grips, tubeless-ready wheels, and a flip-flop stem, the Woom OFF 4 gives kids total control and confidence on their off-road adventures.

Price
Regular price
€859,00 EUR
Sale price
€859,00 EUR
Regular price
Color
Available Out Of Stock
14 Days Return Policy
Woom OFF 4
Made for children, made for adventure

Bike life begins here

safety first

Very cool features

Specs

Product Specifications

Frame material: lightweight, high-quality 6061 T6 aluminum with butted and hydroformed tubes
20″ wheels
Confidence-inspiring handling: an easy-access low top tube, low center of gravity and long wheelbase provide good balance and make for a fun, safe ride
Hard-wearing plastic chainstay protector to prevent scratches
Fully integrated 1 1/8″ – 1″ headset
Sealed industrial-grade bearings
Wide, lightweight aluminum bars with tapered ends
Width: 570 mm
Rise: 20 mm
Lightweight forged aluminum 110 mm cranks with
narrow Q-factor
Narrow-wide chainring with 28 teeth
Cassette with 11–32 teeth
Platform pedals made from fiber-reinforced nylon with metal pins for added grip
Cr-Mo axle and sealed industrial-grade ball bearings
8.1 kg (without pedals)
9-speed gearing
SRAM X5 trigger shifter
SRAM X5 rear derailleur
20 x 2.25" Schwalbe Rocket Ron
ADDIX SPEED rubber compound and Tubeless Easy technology
Tubeless-ready
Presta valves
27.2 x 250 mm
Anodized aluminum seatpost with minimum insertion mark
Hydraulic disc brakes by Promax
Rotor diameter front/back: 140/140 mm
Ergonomic brake levers designed for children's hands
50 kg (maximum combined weight of bicycle, rider and cargo)
Lightweight woom carbon fork
Multidirectional carbon fibers for high torsional stiffness
1 1/8″ – 1″ baby taper steerer tube
100 x 15 mm thru-axle
Post mount for disc brake
Forged aluminum
CNC-machined
Handlebars attached via two clamps
+/-15° flip-flop design to adjust handlebar height
Length: 50 mm
Child-friendly thanks to small diameter
Ultra comfortable thanks to reinforced contact surface for palms
100% silicone for maximum grip
Lock-on design to eliminate twisting
Lightweight, tubeless-ready aluminum rims from Alexrims
Size: 20″
Aluminum hubs with sealed industrial bearings
Thru-axles for maximum torsional strength (100 x 15 mm front / 135 x 12 mm rear)
20 spokes, double-crossed spoking
Aluminum nipples
MTB-specific saddle
Trail-ready design
Ergonomic and age-appropriate design to fit the rider's pelvis
Side protection for leaning against walls
Quick-release aluminum seatpost clamp
Extra-long quick-release lever, easy to operate requiring only minimal strength
No risk of turning and/or twisting
black
terra coppa
tutorials

Assembly instructions

FAQ

Frequently Asked Questions

Woom bikes are designed for kids aged 18 months to 8 years. Check the product specifications to find the right size and recommended age.
We offer a standard 2-year warranty that applies automatically from the day you buy a new woom bike. You need to provide the purchase receipt to make a claim under the warranty. Make sure you keep it somewhere safe.
On a new bike, the Bowden cable is still pretty tight. It will stretch by itself after applying the brakes a few times. If the brakes are too tight, you can easily loosen them by turning the adjustment barrel on the Bowden cable. This will release the tension and open up the brakes. If only one brake pad is rubbing, you can adjust the spring tension on the brake. Our mechanic Tim explains exactly what you need to do in our video about adjusting the brakes.
Ready to upcycle your current woom bike that’s less than three years old? Visit our shop, and we’ll repurchase it for up to 40% of its original price, helping you size up to the next model.
reviews

Our happy clients

5/5

Pro and super friendly. Love the bikes!

Charles
5/5

This bike has been perfect for our 2 year old twin grand sons. It is just perfect for them to ride!

Tonya
5/5

The quality is outstanding and it was easy to put together. I love the look!

Kim
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