Woom OFF

Name: Woom OFF
Brand: Woom

kids

Origin

Launched in 2019, the Woom OFF line entered a gap in the kids MTB market: genuine off-road geometry and components, but with the weight discipline woom applies to its whole range. The rigid carbon fork choice was deliberate — woom argued young riders benefit from feedback from the trail, not damped-out isolation.

Specifications

Frame: 6061-T6 aluminum with butted and hydroformed tubes — optimised for MTB stress loads while staying ultralight
Weight: kg
Drivetrain: 9-speed SRAM X5 with trigger shifter and rear derailleur; 28T narrow-wide chainring; 11–32/36T cassette; kid-specific crank lengths (110–150 mm by size)
Brakes: Promax hydraulic disc brakes; 140 mm rotors (OFF 4), 160 mm rotors (OFF 5/6); ergonomic child-size levers
Wheels: 20" (OFF 4), 24" (OFF 5), 26" (OFF 6) — all tubeless-ready

The verdict

+Strengths

Ultralight carbon rigid fork is a standout spec at this price and rider-age bracket
SRAM X5 9-speed and Promax hydraulic discs deliver adult-quality component performance
Schwalbe Rocket Ron tires provide genuine grip on trails, not just on pavement

−Weaknesses

Rigid fork transmits more trail chop than the OFF AIR with suspension — may fatigue younger/lighter riders on rough terrain
OFF AIR upcharge is significant if suspension becomes desired later
Heavy riders near the top of each size band may find 140 mm rotors (OFF 4) borderline for steep descents

Versions & builds

Every official build side by side — differences highlighted.

Versions & builds
Spec	Woom OFF 4 (20")	Woom OFF 5 (24")	Woom OFF 6 (26")
Drivetrain	SRAM X5, 9-speed, 11–32T cassette, 28T narrow-wide chainring, 110 mm cranks	SRAM X5, 9-speed, 28T chainring	SRAM X5, 9-speed, 11–36T cassette, 28T narrow-wide, 150 mm cranks
Brakes	Promax hydraulic disc, 140 mm rotors front and rear	Promax hydraulic disc	Promax hydraulic disc, 160/160 mm rotors