Woom Bikes WOOM 4 Bike 20 inch 17lb
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The intro to gears!
The woom 4 is a dynamic bicycle that introduces children to gears! Our SRAM X4 8-gear shifter expands the possibilities for the rider. Whether they are out adventuring in an area with hills or going on a long commute in town, this 20" bike is as powerful as the growing child demands it to be.
Hassle-Free Assembly: All tools and easy-to-follow in-home assembly instructions are included.
The 20” woom 4 takes bike riding to the next level. Bike weight: 16.09 lbs; Designed for ages 6 to 9 years or overall height 45"-51”.
Bike: This all-terrain bike introduces kids to gears. With 8 gears and light Schwalbe off-road tires, it is perfect for exploring and longer rides
Shifting gears: The SRAM X4 8-speed shifters boost the joy of riding and expand the rider's range. The gear ratio is designed to handle any terrain, from steep climbs to long descents
Accessories: Kickstand is included for free. Bell and other accessories can be purchased separately.
Weight: 16.09 lbs
Age: 6 - 9 years
Height: 45" - 51"
Red / Blue / Green / Purple / Yellow
woom bikes are equipped with two individual V-brakes. The levers are suited to fit small hands. Safely stopping requires little braking effort.
All components that are specifically designed with safety in mind have the kidsafe PLUS seal. Click the icons to find out more.
Riding a bike is more than just fun in exercising. Discovering the world means expanding one's horizon.
Founder of woom
A Wheel / Tire size 20"
B Cockpit / Grip height 30.32"
C Steering angle 68°
D Horizontal toptube length 17.56"
E Wheelbase 32.48"
F Seattube angle 71.5°
G Minimum Seat Height 22.05"
H Maximum Seat Height 27.95"
I Crank length 4.33"
J Handlebar Adjustment individually adjustable
frame material: light, high quality Aluminum alloy 6061 with seamless tubes
20" wheels and easy handling: low entry and very low sitting position, a long wheel base and forgiving steering geometry to provide good balance and thus more riding fun
light unicrown fork made out of aluminum
self-aligning for easy stearing
fully-integrated 1" headset
sealed industrial bearings
integrated ahead clamp
our new Vario stem makes the bike not only higher but also longer. The bike grows with the child.
handlebar fixed with 2 clamps and bolted with 2 x 5 mm Allen-key
wide, ergonomic and lightweigt with a slight rise for more control
sandblasted / black anodized
580 mm width
reduced diameter suitable for tiny hands
screw in bar end plugs
light, forged 110 mm aluminum cranks with a narrow Q-factor (width between the pedals)
beginner gearing: 29 x 11-28T
plastic platform pedals
2 brake levers with reach adjustability to fit small hands
high-quality Jagwire cables for reduced friction and smooth performance
SRAM grip shifters
SRAM X4 derailleur
ultralight Soopa-Doopa-Hoops aluminium rims
aluminum hubs with sealed bearings
quick-releases to install and remove wheels
20 stainless spokes, 2 x laced
20 x 1.4" Schwalbe Little Joe– woom edition folding tires
low-resistance tires with good damping, low rolling resistance and good grip
car-type valve for easy filling at each service station
reflective strips for better visibility
age-specific ergonomic design
additional added protection to lean on walls
anodized aluminum post withinsertion marks that indicate minimal and maximal insertion depths
Seat Post Clamp
aluminum / quick-release
long lever that is easy to use
does not twist when tightened
5 mm hex key for stem
15 mm pedal spanner
16.09 lbs (without pedals)
woom red, sky blue, woom green, purple haze, sunny yellow
40.9" x 21.7" x 8.7"
Max weight: 154 lbs (70 kg). At woom bikes USA, we reserve the right to make changes to the information on our website at any time. Weights are based on time of information publication and are up-to-date. Weights may vary slightly, as we are always improving our bikes.