Woom Bike Size Chart
Size chart and fit guide for 2026
Continue researching this bike brand
Woom uses a proprietary numbered sizing system (Woom 1 through Woom 6) based on precise height ranges rather than traditional frame sizes. The lineup is now sold under the GO label (formerly Original), with the off-road EXPLORE series for advanced young riders. Every component - from crank length to brake lever reach - is scaled specifically for each size, ensuring proper fit and proportional ergonomics at every stage of growth.
Woom Size Charts by Category
Woom Kids Bike Size Chart
| Size | Height Range | Inseam Range |
|---|---|---|
Woom 1 (12") | 2'8" - 3'3"(82 - 100 cm) | 11.8" - 15.7"(30 - 40 cm) |
Woom 2 (14") | 3'1" - 3'7"(95 - 110 cm) | 14.6" - 18.1"(37 - 46 cm) |
Woom 3 (16") | 3'5" - 3'11"(105 - 120 cm) | 16.9" - 20.5"(43 - 52 cm) |
Woom 4 (20") | 3'9" - 4'3"(115 - 130 cm) | 19.7" - 23.2"(50 - 59 cm) |
Woom 5 (24") | 4'1" - 4'9"(125 - 145 cm) | 21.7" - 26.0"(55 - 66 cm) |
Woom 6 (26") | 4'7" - 5'5"(140 - 165 cm) | 24.8" - 29.9"(63 - 76 cm) |
Popular Woom Models & Sizing Notes
Specific sizing recommendations for Woom's most popular bike models. Geometry measurements shown for reference size (typically M or 54cm).
Woom Woom Wow
🧒 Kids Bike • 202512-inch balance bike for ages 9 to 36 months (height 27"-39"). No-pedal design with a 6 lb aluminum frame, self-centering steering, and silent gliding wheels. Saddle 10.5". Includes a Buddy plush toy.
Woom Woom GO 1
🧒 Kids Bike • 202512-inch balance bike for toddlers 18 months to 3.5 years (inseam 10.0"-14.4", height 31"-40"). Weighs 6.4 lbs. Saddle 10.4"-14.4". Hand brake teaches early stopping; steering limiter prevents oversteering.
Woom Woom GO 1 Plus
🧒 Kids Bike • 202514-inch balance bike for ages 3 to 4.5 years - taller toddlers ready for a balance bike a little later than the GO 1. Lightweight aluminum frame with hand brake and steering limiter.
Woom Woom GO 2
🧒 Kids Bike • 202514-inch single-speed pedal bike for ages 3 to 4.5 years. Smooth transition from balance bike to pedaling. Color-coded brake levers (green rear, red front) teach proper braking technique.
Woom Woom GO 3
🧒 Kids Bike • 202516-inch single-speed pedal bike for ages 4 to 6. Saddle 19"-25.1". Color-coded brake levers (green rear, red front). The renamed Woom Original 3.
Woom Woom GO 3 AUTOMAGIC
🧒 Kids Bike • 202516-inch bike for ages 4 to 6 with a 2-speed automatic hub that shifts gears around 7.5 mph - no shifter needed. Same kid-optimized geometry as the GO 3.
Woom Woom GO 4
🧒 Kids Bike • 202520-inch 7-speed bike for ages 6 to 8. Lightweight aluminum frame (~17.2 lbs). Easy twist shifter and V-brakes with kid-sized levers. The renamed Woom Original 4.
Woom Woom Explore 4
🧒 Kids Bike • 202520-inch all-terrain bike for confident riders ages 6 to 8 with hydraulic disc brakes (160/140 mm rotors), 7-speed microSHIFT shifter, and grippy all-terrain tires. Built for road and light trail.
Woom Woom Explore 5
🧒 Kids Bike • 202524-inch all-terrain bike for ages 7 to 11 (inseam 22.1"-27.9", height 49"-57"). 8-speed microSHIFT, hydraulic disc brakes, 20.8 lb aluminum frame, saddle 27.2"-33.1". Rider weight limit 155 lbs.
Woom Woom Explore 6
🧒 Kids Bike • 202526-inch all-terrain bike for ages 10 to 14 (inseam 22.1"-27.9", height 55"-65"). 8-speed microSHIFT, hydraulic disc brakes, 22.2 lb aluminum frame, saddle 29.9"-38". Rider weight limit 175 lbs.
Woom Woom OFF
🧒 Kids Bike • 2025Woom's off-road kids' MTB family in 20" (OFF 4), 24" (OFF 5), and 26" (OFF 6) wheel sizes. Hydraulic disc brakes, 1x9 SRAM drivetrain, lightweight aluminum frame around 19-22 lb. Designed for kids 6+ ready for real trails; riders 45"-65" tall.
Woom Woom Original
🧒 Kids Bike • 2025Woom's long-running lightweight kids' line: Woom 1 (12" balance), Woom 2 (14"), Woom 3 (16"), Woom 4 (20"), Woom 5 (24"), Woom 6 (26"). Butted aluminium frame with kid-specific geometry at roughly half the weight of typical big-box kids' bikes. Woom has replaced sizes 1-4 with the woom GO and covers sizes 5-6 with the woom EXPLORE, so the Original is available while stock lasts - size the equivalent GO or EXPLORE the same way, and 2020-onwards Original accessories still fit.
As an Amazon Associate we earn from qualifying purchases. Purchases made through these links help support our free calculators.
Woom Sizing Tips
How to Measure
- • Height: Stand barefoot against a wall and measure from floor to top of head
- • Inseam: Stand barefoot with feet 6 inches apart, press a level book firmly upward, and measure from the floor to its top edge
- • Arm Reach: For road bikes, measure from shoulder to fingertips
When Between Sizes
- • Comfort priority: Choose the larger size
- • Performance priority: Choose the smaller size
- • Long torso: Size up for better reach
- • Long legs: Size down for better standover
Woom Sizing FAQ
Accessories for Woom bikes
Helmets, saddles, lights and locks that fit any Woom build.
Bell
Bell Nomad 2 MIPS
This ASIN is Small/Medium 52-57 cm. Check the selected Amazon size/color before checkout.
Avasta
AVASTA Kids Bicycle Saddle
Standard saddle rail spacing fits most kids' seatpost clamps. Designed primarily for 12-20" wheel kids' bikes; larger riders may prefer a wider adult saddle.
Bell
Bell Lumina 300 Headlight
Tool-free handlebar mount; check bar space around computers, bells, and baskets.
Abus
ABUS Granit X-Plus 540
Inner dimensions: 5.5" x 8" (14 x 20cm). Premium size for frame + wheel security. Heavy-duty for high-theft areas.
Bivo
Bivo Duo 25 oz Stainless Bottle
Fits most major cages, but the 77 mm maximum diameter is a touch larger than a standard plastic bottle. Check tight side-load cages on very small frames.
Giro
Giro Register MIPS
S 51-55 cm, M 55-59 cm, L 59-63 cm
Woom Comparisons & Guides
Compare Woom Bikes
View all comparisons →Find Your Woom Size
Use our free calculators and guides to determine your ideal Woom frame size.
Best next guides
Where to go from your Woom sizing
Turn your measurements into a confident buy.