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Ships within 48 hours · Estimated delivery Jul 29 - Aug 3
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Description
woom mountainbike WOOM OFF/ OFF AIR 4 20Woom 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 28 reviews
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Product Reviews
★★★★★ 5
Gentle, Soothing, and Truly Calming
Size: 1.47 Ounce (Pack of 1)
Gentle, Soothing, and Truly Calming
This is a wonderfully gentle bath treatment and one I’m very glad to have on hand. It dissolves easily in the bath and creates a soft, soothing soak that feels calming and comforting to the skin.
It’s fragrance-free, which makes it especially nice for sensitive or easily irritated skin, and it leaves the skin feeling soft rather than dry or tight. The experience is quiet, simple, and effective — exactly what you want from a product designed to soothe.
A great staple for anyone who values gentle care and a calming bath ritual.
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#BathRitual #GentleCare
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WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 15, 2025
★★★★★ 5
Amazing relief
Size: 1.47 Ounce (Pack of 1)
This is the best soak for my eczema skin. Yes, it does clump so I add the packet to a large measuring cup, add some water, and whisk vigorously until clumps are gone, then pour while whisking into the running bath water. Once I started doing this method there were no more clumps and I was able to get the benefits of the product. Definitely a soothing soak for anyone with a skin condition that causes itching.
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Reviewed in the United States on May 13, 2026
★★★★★ 5
works great
Size: 1.47 Ounce (Pack of 1)
It is soothing and effective on dry skin. Great to keep on hand.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 1, 2026
★★★★★ 4
Helps skin
Size: 1.47 Ounce (Pack of 1)
Clumped in the bottom of the tub. Worked better when I mixed it with water and poured in. Did help soothe skin so that’s a positive
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 15, 2026
★★★★★ 5
Pre-Portioned Sachets That Calm Itch and Hydrate
Size: 1.47 Ounce (Pack of 1)
These individual sachets make it incredibly easy to prepare a soothing oatmeal bath when your skin is dealing with itching, dryness, or reactivity. I recently had an allergic reaction that left me with intensely itchy hives across my body, and I was willing to try anything that might help. I picked this up because it was reasonably priced, and it ended up being a great decision.
The powder sprinkles smoothly into running bath water and begins to work quickly to calm the skin. Even though it is a powder, it forms only minimal clumps, and any that do appear are easy to break apart with your fingers. My skin felt noticeably more hydrated and far less irritated after soaking, and I was pleasantly surprised that it didn’t leave any residue behind in the tub.
The pre-portioned sachets make the whole process simple and mess-free, which is especially helpful when you’re already uncomfortable. I’ll definitely be keeping these on hand for times when my skin needs extra TLC.
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Reviewed in the United States on March 10, 2026