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USA
- USA
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- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 9 - Jul 14
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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
4.4 ★★★★★
Based on 2098 reviews
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Product Reviews
★★★★★ 3
Love it, nice for tough chewers, split in half during play
Size: X-Large, Color: Textured Ring, Size: X-Large, Color: Textured Ring
LOVE THIS PRODUCT, would’ve gotten 5 stars but i threw it for my dog and it split in half on contact with the floor. It had lasted us well over 5 months, it’s not his favorite toy but he’ll pick it sometimes, i wouldn’t say it’s unsafe in half just don’t give the smaller parts!
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Reviewed in the United States on December 18, 2025
★★★★★ 5
Dogs love them
Size: X-Large, Color: Textured Ring
Great for aggressive chewers . hold up well
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 26, 2026
★★★★★ 5
Great for power chewers
Size: Large, Color: Bundle
Nothing beats Nylabone!!! Our lab has destroyed everything else… even the extra durable black kongs. Finally a chew toy that is super durable and great size.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 12, 2026
★★★★★ 5
My dogs loved this toy!
Color: Orange & Blue
My dogs absolutely loved these! The quality is actually good and the price for two of them is fair! Surprisingly the durability is more than I expected my aggressive chewer hasn’t completely destroyed it!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 23, 2026
★★★★★ 5
Tough toys!
Color: Orange & Blue
We have 2 deogs, a large Aussie and a small terrior. The little guy is very hard on toys. Few last a full day. We have thrown away hundreds of $ worth of toys, We have had these for a few months, and he has not managed to destoy them yet. They get played with a lot because he has very few toys. I keep trying to find toys which will survive this dog. He hjas even destroyed Kong toys which are pretty tough, but has not destroyed these. I wrote this review as I cam back to order more toys from this company, because it is great to have some which can stand up to his abuse.
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Reviewed in the United States on December 1, 2025