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Measure their head.
- 1Use a soft tape measure or a piece of string and ruler.
- 2Wrap around the widest part of the head, just above the eyebrows.
- 3Keep the tape level and snug, but not tight.
- 4Use the cm measurement to choose a size in the helmet selector.
How the free helmet works
A free helmet with every YOMO bike. Here is exactly how to claim yours — it takes about a minute.
Everything you need to know
Balance first. Confidence follows.
Why YOMO 12 rides better
Proof-led details that help children ride with less effort, easier control and more confidence from the first push.
Looks can create the first smile. The right fit brings them back tomorrow.
Light weight, child-specific fit and easy control help confidence grow into more rides and a lasting love of cycling.
Lightweight build
At 3.6 kg, YOMO 12 keeps the ride manageable so your child can focus on confidence, not fighting the bike.
Scaled for children
From grips and levers to cockpit sizing, the details are chosen so the bike feels natural rather than oversized.
Glide-ready footrest
The integrated footrest supports the balance-bike stage properly, helping children build the movement pattern before pedals.
Controlled steering
The safety headset limits over-rotation, reducing sudden handlebar twists during early riding.
Sealed bearing hubs
Sealed bearing hubs help the wheels roll smoothly and keep maintenance low, with child-friendly hardware details.
Child-specific saddle
The saddle is chosen for children’s proportions so longer rides stay comfortable and confidence lasts beyond the first few minutes.
Rust-resistant details
Stainless spokes and rust-conscious hardware help the bike stay smarter for longer, especially through British weather.
A bike that feels light, natural and easy to control gives confidence room to grow.
YOMO balance bike
99% assembled and protected for delivery
YOMO all-in-one toolkit
Tools for final checks and setup
Easy assembly manual
Clear visual steps for parents
Bike manual
Care, safety and warranty guidance
Bell and reflectors
Safety essentials included
Frame set
Frame
6061 T6 Heat-Treated, Triple Butted Lightweight Alloy.Features Low Centre of Gravity, Child-Specific Geometry, and Internal Cable Routing. Seat tube 6.5’’
Fork
6061 T6 Heat Treated, Lightweight Alloy, 1’’ Alloy Steerer
Headset
1" Threadless; 130° Safety Headset for secure steering.
Seat Clamp
Quick-Release, 28.6mm
Cockpit & contact points
Handlebars
Alloy Butted 380mm Flat Handlebar: 6-Degree Backsweep, 25.4mm Bar Bore
Stem
Lightweight Aluminium, 28.6mm Steerer, 30mm Extension, 25.4mm Bar Bore, With Stem Cover
Grips
Velo ’Mushroom’ Design, Small Diameter, 82mm Length
Saddle
Velo Comfy Padding, Child-Specific Ergonomics, Adjustable Seatpost Angles (66° • 68° • 70° • 72°), L: 180mm x W: 108mm
Seatpost
Alloy, 25.4mm Dia, 200mm Length, Integrated with Saddle
Braking System
Brake Levers
Tektro JL352-RS, Aluminium, Reach Adjustable Mechanism, Tailored for Children’s Hands. Left Only.
Rear Brake
Alloy Mini V-Brake, Dual Linear Spring Tension Adjuster.
Wheelset
Rims
YOMO Lightweight Aluminium, 16H
Front Hub
Aluminium Hubs, Sealed Bearing, Narrow Lightweight Hub, 16H, with Allen Key Bolts(no ouchie edges!)
Rear Hub
Aluminium Hubs, Sealed Bearing, Narrow Lightweight Hub, 16H, with Allen Key Bolts(no ouchie edges!)
Spokes
Stainless Steel, 14G
Tyres
Lightweight Hybrid tyres, 12.5’’ x 1.75 (47-203), Low Rolling Resistance
Inner tubes
Schrader (American valve), Lightweight Tubes
What size child does this model suit?+
YOMO 12 is designed for riders aged approximately 18 months–3 years, with an inside leg of 32–42 cm and rider height of 83–109 cm. Age starts the search; inside leg confirms the fit.
How much assembly is needed?+
YOMO 12 arrives 99% assembled, with the front wheel already fitted. Remove the packaging on a clean, flat surface, check every component is secure and follow the included setup guide before riding.
How do I set the saddle height?+
Set the saddle so both feet rest flat on the ground with a slight bend in the knees. Raise it gradually as confidence grows, while keeping both feet able to reach the ground safely.
How do I adjust the brake lever position?+
Loosen the lever clamp bolt slightly, rotate the lever to a comfortable angle for the rider hand, retighten it securely and confirm the rear brake engages fully before riding.
What if the brake rubs?+
Check that the wheel is seated correctly and the brake pads sit evenly beside the rim. Use the brake-arm spring-tension screws only as shown in the setup guide, then confirm the wheel spins freely and the brake stops the bike securely.
How often should I service it?+
Check tyre pressure, brake operation, wheel security, steering and bolt tightness regularly. Arrange a yearly safety check by a qualified bike mechanic if the bike is ridden frequently.
Where is the serial number?+
The serial number is stamped on the underside of the frame. Take a clear photo after purchase for registration, warranty and support.
What is the maximum rider weight?+
The maximum total load for this model is 30 kg, including the rider and anything they carry. Staying within it keeps the frame, wheels and components working as designed.
What tyre pressure should I use?+
Use the permitted pressure range printed on the tyre sidewall. For a lighter rider, start in the lower part of that range and adjust for grip and comfort. Never exceed the maximum shown on the tyre.
What happens when my child outgrows it?+
YOMO BikeTrade lets you trade in an eligible YOMO towards the next size. The calculator gives an estimate; final credit is confirmed after inspection and depends on age, condition and the current programme terms.
What is the warranty?+
YOMO bikes include a 3-year frame and fork warranty as standard. Eligible bikes registered within 30 days receive lifetime frame and fork cover for the original purchaser. Other components are covered for 1 year against manufacturing faults. Normal wear, crashes, misuse, poor maintenance, incorrect assembly, modifications, improper repairs and cosmetic marks from use are not covered.
Can I return it if it is not right?+
Unused bikes can be returned within 30 days in their original condition, packaging and with all accessories included. Contact YOMO before returning the bike; collection costs may apply to unwanted returns.
Trusted by parents
Loved from the veryfirst ride.
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