woom Original 4 vs woom Up 6

Fuel	Hybrid	Hybrid
Motor	--	Fazua evation propulsion system 250 watt motor power 250 Wh battery capacity 55 Nm torque Assistance up to 20 km/h three support levels Removable motor-battery unit (3.3 kg), down tube cover available separately from Fazua Adjustment of various settings via the Fazua Rider app
Drivetrain	- Lightweight, forged 110 mm aluminium cranks with narrow Q-factor - Narrow-wide chainring with 28 teeth - Cassette with 11-28 teeth - Narrow, flat platform plastic pedals - Sealed cartridge	light, forged aluminum cranks with a length of 150 mm and small pedal spacing (Q-factor) Narrow wide direct mount chainring 28T Cassette with 11 to 42 teeth Fiber reinforced nylon platform pedals with Cr-Mo axle and sealed industrial ball bearings
Riding Modes	7 speeds	--
Frame	- Frame material: light, high-quality AA 6061 aluminium with butted tubes - 20″ wheels - Agile yet easy handling: low entry, very low sitting position and forgiving steering geometry to provide good control and more riding fun	Frame material: lightweight, high-quality machined 6061-T6 aluminum with butted and hydroformed tubes 26″ wheel size sporty handling: low entry, low center of gravity and long wheelbase ensure safe handling as well as good balance and great driving pleasure
Stem	- Lightweight stem made out of forged aluminium - Adjustable height and reach mean the Vario stem offers an optimal riding position as the child grows. - Handlebars attached via two clamps and fixed with two 5 mm hex bolts	forged aluminum CNC processed Handlebars attached with two clamps +/-15° flip-flop design to adjust handlebar height Length: 50mm
Handle Bar	- Wide, ergonomically adapted and lightweight aluminium bars for more control - Sandblasted and anodised in black - Width: 540 mm	Wide, ergonomically adapted and light aluminum handlebars for better control over the bike sandblasted and silver anodized Width: 680mm Rise: 20mm
Fork	- Light unicrown fork made out of aluminium - 1″ shaft - Generous trail angle for easy handling	Hydraulic air suspension fork with adjustable compression and rebound damping and lockout function, 90 mm spring travel 1 1/8″ – 1″ baby taper shank Thru axle 100 x 15 mm Postmount mount for disc brakes
Seats	--	made of aluminium secured against twisting
Seatpost	Anodised aluminium seatpost with insertion marks that indicate the minimum insertion depth	27.2x300mm anodized aluminum seat post with display of the maximum permissible extension
Grip	- woom Ergogrips, child-friendly thanks to small diameter - Ergonomically formed gripping surface - Handlebar ends with extra large diameter for greater protection - Screw-in grips for secure attachment to handlebars	--
Shifters	MicroSHIFT MS29 twist shifter	SRAM NX trigger shifter
Saddle	- Ergonomically designed to fit children's pelvis - Side protection to lean against walls	ergonomically adapted to the child's pelvic bones lateral protection for leaning against house walls
Headset	- Fully-integrated 1″ headset - Sealed industrial-grade bearings - Integrated ahead clamp	--
Derailleur Rear	MicroSHIFT M21SS derailleur	SRAM NX rear derailleur

Front	- 20 x 1.4″ Schwalbe Little Joe folding tyres – woom edition - High-quality, lightweight tyres for good shock absorption, low rolling resistance and maximum grip - Car-type valves for easy filling at any service station - Reflective stripes on the sides of the tyres for optimal visibility even in low-light conditions	26 x 2.35″ Schwalbe Rocket Ron with ADDIX SPEED rubber compound high-quality MTB tires with low rolling resistance, maximum grip, good cushioning and durability Car valves for easy filling at any gas station
Rear	--	--
Wheel / RIM	- Ultralight SOOPA DOOPA HOOPS aluminium rims - Aluminium hubs with sealed bearings and mount for woom click-on fenders - Quick-release skewers for easy installation and removal - 20 lightweight, super strong stainless steel spokes, double-crossed spoking	super light woom OFF DISCO TEC double chamber aluminum rims Aluminum hubs with sealed cartridge bearings Thru-axles for maximum rigidity (100 x 15 mm at the front / 135 x 12 mm at the rear) 20 G14 spokes, double crossed aluminum nipples

Front	- Two independently operated V-brakes with braking power adapted for children - Ergonomically adapted brake lever with reach adjustability - High-quality Jagwire cables for reduced friction and smooth performance	Promax hydraulic disc brakes Disc diameter front/rear: 160/140 mm Ergonomically fitting brake lever for small children's hands
Rear	--	--

Front	--	--
Rear	--	--

Colors

woom red sunny yellow woom green sky blue purple haze

Electric blue

Length	--	--
Weight	8 kg	17 kg

Features	- Superlight aluminium frame - Easy-to-operate microSHIFT twist shifter	- Smooth drive system - Ultra-light aluminum frame - High-quality suspension fork - Easily adjustable disc brakes - Smooth shifting enables smooth shifting
Accessories	--	4 mm Allen key for stem and seat clamp 8 mm Allen key for front wheel and pedals