Woom OFF 4 - Kid Mountain Bike (20")
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!
Size 20″ • 18.5 lbs
Age 6 - 8 years • 46 - 51″
Specifications
Frame
- Frame material: lightweight, high-quality 6061-T6 aluminum with butted and hydroformed tubes
- 20″ wheels
- Easy-access low top tube to assist dismounting
- Long wheelbase and low center of gravity to aid balancing
- Featuring woom-specific molded chainstay protector
Gears
- 9 speeds
- SRAM X5 trigger shifter
- SRAM X5 rear derailleur
Fork
- Light carbon fork
- 1 – 1 ⅛″ tapered steerer tube
- 100 x 15 mm thru axle
- Post mount for disc brake
Wheels
- Tubeless-compatible Alexrims wheelset
- Aluminum hubs with sealed industrial bearings
- Thru axles for maximum torsional strength (100 x 15 mm front and 135 x 12 mm rear)
- 20 G14 spokes, double-crossed spoking
- Aluminum nipples
Headset
- Fully integrated 1 – 1 ⅛" headset
- Sealed industrial bearings
Tires
- 20 x 2.25″ Schwalbe Rocket Ron with ADDIX SPEED rubber compound
- Quality mountain bike tires with low rolling resistance, maximum grip, good shock absorption, and excellent durability
- Presta valves, tubeless conversion ready
Stem
- Forged aluminum
- CNC-machined
- Handlebars attached via two clamps
- Rise/drop: +/-15° with flip-flop design to adjust the handlebar height
- Length: 50 mm
Saddle
- Ergonomically designed to fit a child’s anatomy
- Streamlined, mountain-bike-specific saddle design
- Side protection to lean against walls
Handlebars
- Wide, ergonomically adapted and lightweight aluminum bars for more control
- Tapered end to fit a child’s hand
- Sandblasted and silver anodized
- Width: 570 mm
- Rise: 20 mm
Seatpost
- 27.2 x 250 mm
- Anodized aluminum seatpost with insertion marks that indicate the minimum insertion depth
- Quick-release seatpost clamp
Grips
- Child-friendly because of a small diameter
- Single-clamp grip to prevent twisting
- Safety zone: extra rubber on the palm-facing portion of the grip for added comfort
- 100% silicone for maximum grip
Seatpost Clamp
- Quick-release seatpost clamp for easy adjustments
- Made from aluminum
Drive
- Lightweight, forged aluminum, 4.3" (110 mm), kid-specific cranks with narrow tread (Q-factor)
- Narrow-wide chainring with 28 teeth in the front
- Cassette with 11-32 teeth in the back
- Flat pedals made from fiber-reinforced nylon
- Chromoly axle and sealed, industrial ball bearings
Brakes
- Hydraulic disc brakes by Promax
- Rotor diameter front/back: 140/140 mm
- Ergonomic brake levers designed for a child’s hands
Enclosed tools
- 4 mm hex key for the stem and seatpost clamp
- 8 mm hex key for the front wheel and pedals
Weight
- Bike weight: 18.5 lbs
- Max weight: 110 lbs combined weight of the Rider and cargo
Weight limit
50 kg (maximum combined weight of bicycle, rider and cargo)
Colors
- Black
- Terra Coppa
Shipping dimensions
45 x 26 x 9”
Assembly Instructions
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
Guarantee
The woom 10-year warranty
Inspiring children to love riding their bikes is our mission at woom. That's why we guarantee the premium quality of every bike down to the last detail with innovative technology and long-lasting materials.
We have full confidence in our bikes, which is why we offer a 10-year warranty on the aluminum frames, rigid forks, bars and stem once you've registered online.