woom OFF Air 4 Complete Mountain Bike - Kids' 2025
Model Info
woom OFF Air 4 Complete Mountain Bike - Kids' 2025
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Product Info
The progressive woom OFF Air 4 Complete Mountain Bike is built for young riders ready to push past the basics and chase real adventure. With a confidence-boosting front suspension fork, lightweight yet tough components, and tubeless-ready wheels, this bike is made to keep up with every daring move. From flowy singletrack to gravel paths to after-school pavement sessions, the OFF Air 4 delivers a stable, responsive ride that grows with your rider’s skills.
Product Details
Key Features
Age – 4 - 6 years
Rider Height – 46" - 51"
Green Rear Brake
Ergonomic Saddle
Protective Handlebar Grips
BMX-Style Handlebars
Chainguard
Steering Limiter – Flexible rubber ring linking the fork and frame to stabilize steering.
Specs
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Biking Type:
Mountain
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Biking Type
Mountain Mountain bikes are built for tackling rough terrain with frames made of durable materials like aluminum or carbon fiber, ensuring stability and maneuverability. They feature suspension to absorb impacts from rocks, roots, and drops, providing a smoother ride.
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Used For:
Trail
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Used For
Trail Trail bikes are the quintessential “mountain bikes.” If you’re heading into the woods expecting to do it all on two wheels – climbing, technical sections, AND fun descents – you’re looking for a trail bike.
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Suspension:
Hardtail
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Suspension
Hardtail As the name suggests, hardtail bikes feature a rigid frame with front suspension only. This means that the rear wheel lacks any form of suspension, hence the term "hardtail."
Hardtail mountain bikes are renowned for their efficiency in transferring power from the pedals to the rear wheel, making them excellent choices for climbing and maintaining speed on smoother trails or paved surfaces.
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Frame Material:
Aluminum Alloy
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Frame Material
Aluminum Alloy Aluminum is the second lightest material per cubic inch, after carbon, but it is significantly more affordable. It offers versatility, strength, and durability that works well in all trail disciplines.
- Gearing: 1 x 9
- Water Bottle Mounts: 0
- Fork: 6061 Aluminum Rigid
- Fork Travel (mm): 60
- Shifters: SRAM X5 Trigger Shifter
- Rear Derailleur: SRAM X5, 9-Speed
- Crankset: Alloy, 28t
- Pedals: Platform
- Brake Levers: Promax
- Brake Calipers: Promax Disc
- Rotors: 140mm Front / 140mm Rear
- Headset: Fully Integrated 1–1 ⅛″, Sealed Industrial Bearings
- Stem: Forged CNC Aluminum, 50 mm, +/-15° Flip-Flop Design, Height Adjust ±0.47″
- Saddle: Ergonomically Designed Kids MTB Saddle
- Seatpost: Alloy 27.2mm
- Hubs: Aluminum, Sealed Industrial Bearings, Thru-Axle (100 x 15 mm Front, 135 x 12 mm Rear)
- Rims: Alexrims, Tubeless-Compatible
- Spokes: 20 G14, Double-Crossed, Aluminum Nipples
- Tires: Schwalbe Rocket Ron ADDIX SPEED, 20 x 2.25″, Tubeless-Ready
- Warranty: 10-Year Warranty on Frame, Fork, Stem, and Bars With Registration
| Size | 4 |
| Rider Height | 46"–51" |
| Effective Top Tube (mm) | 457 |
| Head Tube Angle (°) | 68 |
| Seat Tube Angle (°) | 70 |
| Wheelbase (mm) | 838 |
| Complete Weight (lbs) | 21.7 |
| Wheel Size | 20" |