Woom OFF AIR 4
Details
The ultralight and durable 20" mountain bike with front suspension, 9 gears, and disc brakes is designed for children aged 6 years and over.
Rare AIR
The newly upgraded 20" woom OFF AIR 4 will take its Rider beyond the beginning stages of their mountain biking journey. Stable, responsive, and equipped with a high-performance front suspension system, durable components, and tubeless-compatible rims and tires, it provides best-in-class value in its category. Off-road capable and kid-tested, this mountain bike was ergonomically designed for growing bodies and developing abilities. The woom OFF AIR 4 is more than capable on cross-country trails yet uncompromising on gravel, pavement, or wherever the spirit leads your Rider.
| Model | Inseam | Height |
|---|---|---|
| woom OFF 4 | 22.8" - 28.7" | 46" - 51" |
| woom OFF 5 | 27.8" - 33.7" | 50" - 57" |
| woom OFF 6 | 30.3" - 37.8" | 55" - 65" |
| woom OFF AIR 4 | 22.8" - 28.7" | 46" - 51" |
| woom OFF AIR 5 | 28.3" - 34.3" | 50" - 57" |
| woom OFF AIR 6 | 30.7" - 38.2" | 55" - 65" |
| Tire/wheel size | 20" |
|---|---|
| Handlebar height | 31.5" |
| Steering angle | 68° |
| Horizontal top tube length | 18.1" |
| Wheelbase | 33.5" |
| Seat tube angle | 70° |
| Minimum saddle height | 22.8" |
| Max. saddle height | 28.7" |
| Crank arm length | 4.3" |
| Handlebar adjustment | Angle +/-15°, Height +/-0.47" |
Specs
| 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 |
|---|---|
| Fork | RST SPEX hydraulic air suspension fork with 60 mm travel, adjustable compression, and rebound damping, plus lock-out 1 – 1 1/8" 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 |
| 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 |
| Crankset | 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 |
| Shifters | 9 speeds, SRAM X5 trigger shifter |
| Rear Derailleur | SRAM X5 rear derailleur |
| Brakes | Hydraulic disc brakes by Promax Rotor diameter front/back: 140/140 mm Ergonomic brake levers designed for a child’s hands |
| 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 |
| Tape/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 |
| 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 |
| Headset | Fully integrated 1 – 1 1/8" headset Sealed industrial bearings |
| Seatpost | 27.2 x 250 mm Anodized aluminum seatpost with insertion marks that indicate the minimum insertion depth Quick-release seatpost clamp |
| Saddle | Ergonomically designed to fit a child’s anatomy Streamlined, mountain-bike-specific saddle design Side protection to lean against walls |
* Subject to change without notice.
Part Numbers
| Option | UPC | MPN | Store SKU |
|---|---|---|---|
| Black / 20-inch | 09120083727098 | 100015-0063-8001 | WOO276812584 |