SKU: 40471060471
woom bike mountainbike

woom bike mountainbike WOOM OFF/ OFF AIR 4 20" Pedal Bike – WeeBikeShop

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Ships within 48 hours · Estimated delivery Aug 15 - Aug 20

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Description

woom bike mountainbike WOOM OFF/ OFF AIR 4 20" Pedal Bike – WeeBikeShopWoom OFF 4 Get out and explore The 20" woom OFF 4 is the perfect first mountain bike for kids age 6 8 years and height 46 51 inches. Whether they're taking on the pump track or exploring forests and fields, this superlight and sturdy bike will help them progress in their mountain biking journey. With high quality components and tubeless compatible rims and tires, the woom OFF 4 offers exceptional value in its category. Don't miss out on this

Woom OFF 4

Get out and explore 

The 20" woom OFF 4 is the perfect first mountain bike for kids age 6-8 years and height 46-51 inches. Whether they're taking on the pump track or exploring forests and fields, this superlight and sturdy bike will help them progress in their mountain biking journey. With high-quality components and tubeless-compatible rims and tires, the woom OFF 4 offers exceptional value in its category. Don't miss out on this opportunity to inspire and empower your young rider!

Woom OFF Air 4 comes with front suspension, 9 gears and disc brakes designed for children aged 6 years and over.

Geometry:

Tire/Wheel  20"
Handlebar height   31.5"
Steering Angle   68°
Top Tube Horizontal    18.1"
Wheelbase   33.5"
Seat Tube Angle  70°
Minimum Saddle Height   22.8"
Maximum Saddle Height  28.7"
Crankarm Lenght  4.33"
Handlebars adjustability   Angle +/-15°; Height +/- 0.47″

Specification

Frame
Frame material: lightweight, high-quality 6061 T6 aluminum with butted and hydroformed tubes.
20″ wheels
Sporty handling: an easy-access low top tube, low centre of gravity and long wheelbase provide good balance and make for a fun, safe riding experience
Fork
Light carbon fork
1″ – 1 1/8″ baby taper shaft
100 x 15 mm through axles
Post mount for disc brake
Gears
9 speeds
SRAM trigger shifter
SRAM X5 derailleur
Headset
Fully integrated 1″ – 1 1/8″ headset
Sealed industrial bearings
Stem
Forged aluminum
CNC-machined
Handlebars attached via two clamps - +/-15° flip-flop design to adjust handlebar height
Length: 50 mm
Handlebars
Wide, ergonomically adapted and lightweight aluminum bars for more control
Sandblasted and silver anodised
Width: 580 mm
Rise: 20 mm
Grips
Child-friendly thanks to small diameter
100% silicon for maximum grip
Single-clamp grip to prevent twisting
Safety zone: extra rubber on the palm-facing portion of the grip for added comfort
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
assette 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 from Promax
Disc diameter front/back: 140/140mm
Ergonomic brake levers designed for children's hands
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
Saddle
Ergonomically designed to fit children's anatomy
Side protection to lean against walls
Seatpost
27.2 x 250 mm
Anodised aluminum seatpost with insertion marks that indicate the minimum insertion depth
Seatpost clamp
Quick-release seatpost clamp for easy adjustments
Enclosed tools
4 mm hex key for stem and seatpost clamp
8 mm hex key for front wheel and pedals
Bike Weight
Bike weight: 18.5 lbs | OFF Air Bike weight: 20.9 lbs.
Max weight: 110 lbs combined weight of the Rider and cargo
    Shipping Notes
    • Free Standard Shipping on $100+ Orders to the USA.
    • Except Preorder products are shipped in 48 hours.
    • Delivery to the USA:
    1. Standard Shipping : 3-10 business days
    • If time is of the essence, please consider selecting expedited delivery for faster service.
    Exchange/Return Notes
    • We offer a 30-day return/exchange service after receiving.
    • Final sale items are not eligible for returns or exchanges.
    • To process your return/exchange, please contact us at [email protected]
    • Please click here for more details>>> Return & Exchange Policy
    SKU: 40471060471

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    4.8 ★★★★★
    Based on 30 reviews
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    Verified Purchase
    Megan
    Charlottesville, US
    ★★★★★ 5
    Sturdy and Functional
    Color: White, Size: 4 Panel Basic
    I got this to replace a poor quality divider that I tried first, and this thing is the best! It is easily folded, stands sturdily, easy to assemble, and the fabric looks great. Very very happy with the quality for the price.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on March 17, 2026
    L
    Verified Purchase
    L. E. Morales
    Pawtucket, US
    ★★★★★ 1
    Arrived damaged
    Color: Black, Size: 4 Panel Basic
    Unfortunately, very cheaply made. It arrived with one of the connecting tubes cracked horizontally. Possibly due to bad welding. It is quite a headache to assemble. It was delivered on time but returned for a refund.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on April 8, 2026
    E
    Verified Purchase
    Elisabeth Baird Bennett
    Belleville, US
    ★★★★★ 3
    Not a great experience but a fine product
    Color: Black, Size: 4 Panel Basic
    not enough screws were included to make the wall. I was able to locate more screws to finish building-so I didn’t have to return the product- but it was a pain and I got lucky finding the pieces I needed but it could’ve been a fail and a returned product
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on January 12, 2026
    A
    Verified Purchase
    April Lehman
    Port Orchard, US
    ★★★★★ 5
    Useful, simple room divider
    Color: White, Size: 4 Panel Basic
    All the pieces were accounted for, and some even had extra pieces, maybe just in case they need changing. It was a bit like putting together a piece of IKEA furniture, though I went slower than usual so as not to make any mistakes. It wasn’t too hard to put together myself, and helps give my studio apt a feeling of space and privacy for my bed. I only wish it had a lovely Japanese design on it, but it does amazingly seem to match the wall color.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on March 3, 2026
    K
    Verified Purchase
    Kswain149
    Whiting, US
    ★★★★★ 4
    Multi purpose divider
    Color: White, Size: 4 Panel Basic
    I am excited this divider is being used to block off a portion of the dining room where I stored extra supplies. It looks nice!
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on October 1, 2025

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