An ultralight and durable 20" mountain bike with a carbon fork, 9 gears and disc brakes designed for children aged 6 years and over (115-130cm).
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.
Superlight frame
The superlight aluminum frame has capable off-road geometry with a long wheelbase and slack steering angle for improved stability and smooth, responsive handling. Extra confidence comes from the kink in the top tube, which makes it easy to dismount quickly in any situation.
Durable carbon fork
Superlight and super stylish – the carbon fork balances maximum stability with minimum 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
The age-appropriate MTB saddle and ergonomically profiled handlebar grips add comfort, while the hard-wearing platform pedals with metal pins provide the necessary grip for all-terrain riding.
Precise shifting
The precise and intuitive SRAM X5 rear derailleur has nine gears and a wide gear range thanks to the 28-tooth chainring up front and an 11–32 cassette at the rear. The easy-to-operate trigger shifter operates smoothly and reliably to make light work for children’s thumbs.
Reliable disc brakes
Easy-to-modulate disc brakes are teamed with child-specific, reach-adjustable brake levers to provide maximum stopping power and control in every situation including steep slopes and wet conditions.
Grippy tubeless-ready MTB tires
High-quality Schwalbe mountain bike tires combine low rolling resistance with superior grip and proven durability. With Tubeless Easy technology and tubeless-ready rims, it’s a straightforward transition to go tubeless and benefit from added comfort and grip.
Lightweight flip-flop stem
Specially developed from forged aluminum, the stem pairs the ultimate stiffness with the lowest possible weight. Thanks to its flip-flop design, there’s the option to raise the height of the bars simply by inverting it.
| Frame | - | Frame material: lightweight, high-quality 6061 T6 aluminum with butted and hydroformed tubes; 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 |
| Wheel size | - | 20" |
| Gears | - | 9 (1x9) |
| Suitable for length | - | 115-130 cm |
| 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 |
| Brake system | - | Hydraulic disc brakes by Promax; Rotor diameter front/back: 140/140 mm; Ergonomic brake levers designed for children's hands |
| Rear derailleur | - | SRAM X5 |
| Shifters | - | SRAM X5 |
| Crankset | - | Lightweight forged aluminum 110 mm cranks with narrow Q-factor; Narrow-wide chainring with 28 teeth |
| Cassette | - | 11-32T |
| Stem | - | Forged aluminum; CNC-machined; Handlebars attached via two clamps; +/-15° flip-flop design to adjust handlebar height; Length: 50 mm |
| Headset | - | Fully integrated 1 1/8″ – 1″ headset; Sealed industrial-grade bearings |
| Handlebar | - | Wide, lightweight aluminum bars with tapered ends; Width: 570 mm; Rise: 20 mm |
| 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 |
| Wheels | - | Lightweight, tubeless-ready aluminum rims from Alexrims; 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 |
| Tyres | - | 20 x 2.25" Schwalbe Rocket Ron; ADDIX SPEED rubber compound and Tubeless Easy technology; |
| Saddle | - | MTB-specific saddle; Trail-ready design; Ergonomic and age-appropriate design to fit the rider's pelvis; Side protection for leaning against walls |
| Seatpost | - | 27.2 x 250 mm; Anodized aluminum seatpost with minimum insertion mark |
| Seat 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 |
| Pedals | - | Platform pedals made from fiber-reinforced nylon with metal pins for added grip; Cr-Mo axle and sealed industrial-grade ball bearings |
| Weight | - | 8,1 kg |
*Because of ongoing problems in the delivery chain, the bike can be delivered with modifications.
