Woom OFF 4 Mountain Bike for Kids

Minimal weight. Maximum fun.

The next-generation woom OFF 4 is an ultralight, super capable mountain bike for kids aged six and up, designed to introduce your child to a world of off-road adventure and help them take their bike skills up a gear. The ergonomic design, child-specific geometry and premium components provide total control and added safety.

Specifications

Frame

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

Gears

9-speed gearing
SRAM X5 trigger shifter
SRAM X5 rear derailleur

Fork

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

Wheels

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

Headset

Fully integrated 1 1/8″ – 1″ headset
Sealed industrial-grade bearings

Tires

20 x 2.25" Schwalbe Rocket Ron
ADDIX SPEED rubber compound and Tubeless Easy technology
Tubeless-ready
Presta valves

Stem

Forged aluminum
CNC-machined
Handlebars attached via two clamps
+/-15° flip-flop design to adjust handlebar height
Length: 50 mm

Saddle

MTB-specific saddle
Trail-ready design
Ergonomic and age-appropriate design to fit the rider's pelvis
Side protection for leaning against walls

Handlebars

Wide, lightweight aluminum bars with tapered ends
Width: 570 mm
Rise: 20 mm

Seatpost

27.2 x 250 mm
Anodized aluminum seatpost with minimum insertion mark

Grips

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

Seatpost clamp

Quick-release aluminum seatpost clamp
Extra-long quick-release lever, easy to operate requiring only minimal strength
No risk of turning and/or twisting

Drivetrain

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

Brakes

Hydraulic disc brakes by Promax
Rotor diameter front/back: 140/140 mm
Ergonomic brake levers designed for children's hands

Included tools

4 mm hex key for stem
8 mm hex key for front wheel and pedals

Colors

black
terra coppa

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