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Ships within 48 hours · Estimated delivery Jul 27 - Aug 1
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Description
pedal bike mtb Woom Kids OFF 4 20in Mountain BikeWoom 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
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
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
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
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
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
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
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
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:
- 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
4.2 ★★★★★
Based on 17 reviews
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Product Reviews
★★★★★ 4
Great product
Material Type: Carbon Fiber Leather, Color: Black-3926
Very strong and reliable can't carry much cash but it is very handy
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Reviewed in the United States on March 16, 2026
★★★★★ 5
Great front pocket wallet.
Material Type: Leather, Color: Coffee-4338
This Wallet is great. It took some getting used to having the cards all in one slot, but since they pop up in a stair-step design as long as you keep your cards in the same order you’ll always reach for the right one. Materials are high quality and it feels good in the hand. I really like the look and weight of this wallet as well. I will likely purchase these as gifts for the other men in my life.
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Reviewed in the United States on May 26, 2026
★★★★★ 5
Rfid wallet
Material Type: Carbon Fiber Leather, Color: Black-3926
Just received the wallet. It does exactly what I expected it to do. Hold my cards securely and has a money clip, plus rfid blocker. Great price too.
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Reviewed in the United States on April 21, 2026
★★★★★ 5
As advertised...Quality
Material Type: Leather, Color: Black-6313
As advertised...Should have purchased sooner....quality and reasonable price...guaranteed
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Reviewed in the United States on May 21, 2026
★★★★★ 5
For the Back Pocket Carrier out there....
Material Type: Leather, Color: Forest Brown-4337
I think this wallet is awesome! I've been carrying for about a week and it is working out great. I usually don't carry cash but for the last week, I've actually had a little cash on me. Instead of using the clip on the back (that clip is pretty tight and I don't like the look of having cash there), I just put is under the ID flap and the magnetic closure holds it in place. I love the color, the trigger works great, and the cards are held securely even when it isn't completely full. I also like the size. It requires me to carry less, which is something I need. (I realized two weeks ago that I had been carrying an old debit card in my old wallet around that had expired in 2023 and it turned out that I didn't have an account at that bank! hahahahahaha. I must be getting old.).
This is important to me: I carry a wallet in my back pocket. I always have and that is what is comfortable to me. Front pocket carry feels weird to me. I've been carrying this wallet in my back pocket and sitting on it with no issues. I'm a big guy (300 lbs) and, so far, it's held up great. In all honesty, I do take it out of my pocket and put it in my console when I drive, but that's it. Everywhere else I go, and sit, it stays in my back pocket. I know it's only been a week, but I'm glad to see that I haven't crushed it, or deformed it, or anything.
Ultimately, it's been great and I'm glad I got this one.
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Reviewed in the United States on May 9, 2026