The new, optimized woom OFF AIR 4 offers children aged six and over an ultra-light, robust and suspension mountain bike with which they are perfectly prepared for all their off-road adventures. The high-quality suspension fork and reliable disc brakes ensure maximum comfort and full control - whether on cross-country trails, gravel or asphalt.

Frame

Frame material: lightweight, high-quality 6061-T6 aluminum with butted and hydroformed tubes
20″ wheel size
Sporty driving behavior: low entry, low center of gravity and long wheelbase ensure safe handling as well as good balance and great driving pleasure
Robust chainstay protection made of plastic against paint damage

circuit

9 courses
SRAM X5 trigger shifters
SRAM X5 rear derailleur

Fork

Air suspension fork made of aluminum from RST
adjustable compression and rebound damping as well as lockout function
60mm travel
1 1/8″ – 1″ baby taper shaft
Thru axle 100 x 15 mm
Postmount mount for disc brakes

Wheels

Lightweight, tubeless aluminum rims from Alexrims
Size: 20″
Aluminum hubs with sealed industrial bearings
Thru axles for maximum rigidity (100 x 15 mm front / 135 x 12 mm rear)
20 spokes, laced double crossed
Aluminum nipple

tax rate

fully integrated 1 1/8″ – 1″ headset
sealed industrial bearings

Tires

20 x 2.25” Schwalbe Rocket Ron
with ADDIX SPEED rubber compound and Tubeless Easy technology
Conversion to tubeless set-up possible
Presta valves

Stem

forged aluminum
CNC processed
Handlebar attached with 2 clamps
+/-15° flip-flop design to adjust the handlebar height
Length 50mm

saddle

MTB saddle
sporty design
Ergonomically adapted to the child's pelvic bones of the respective age group
lateral protection for leaning against house walls

Handlebars

Wide, lightweight aluminum handlebars with conically shaped grip ends
Width: 570mm
Rise: 20mm

Seat post

27.2x250mm
Anodized aluminum seat post with display of the maximum permissible extension

Handles

child-friendly thanks to its small diameter
particularly comfortable thanks to the reinforced support surface in the metacarpal area
Made entirely of silicone for a secure hold
Handlebar ends secured against twisting with clamps

Seat clamp

Aluminum saddle quick release
Long clamping lever, can also be operated with little manual force
secured against twisting

drive

Lightweight, forged aluminum cranks
110 mm length and low pedal distance (Q factor)
Narrow-wide chainring with 28 teeth
Cassette with 11 to 32 teeth
Platform pedals made of fiber-reinforced nylon with metal pins for good grip
CrMo axle and sealed industrial ball bearings

Brakes

Promax hydraulic disc brakes
Disc diameter front/rear: 160/140 mm
Ergonomically fitting brake lever for small children's hands

Weight

9.2 kg (without pedals)
Weight limit

50 kg (max. total weight consisting of bike, rider and luggage)