Quick answer: The Neo Outlaw 16" HP121E is ideal for ages 5–8, the Neo Outlaw Surge 18" suits ages 7–10, and the Neo Outlaw Surge 20" is best for ages 9 and up. Choosing the right size comes down to your child's age, height, and riding experience — and this guide covers all three models in detail.
Why Bike Size Matters
Buying an electric bike that's the wrong size is one of the most common mistakes parents make. Too small and your child will outgrow it within months. Too large and they'll struggle to control it safely, knocking their confidence before they've even got started.
The Neo Outlaw range is designed to grow with young riders — from first-time balance bike beginners right through to confident off-road adventurers. Each model is engineered for a specific stage of development, and choosing the right one makes all the difference to how quickly your child progresses and how much they enjoy riding.
This guide breaks down every Neo Outlaw electric bike size — the 16" HP121E, the Surge 18", and the Surge 20" — so you can make the right call first time.
Neo Outlaw at a Glance: Size Comparison
| Model | Wheel Size | Recommended Age | Motor | Max Speed | Range | Max Load | Price |
|---|---|---|---|---|---|---|---|
| Neo Outlaw 16" HP121E | 16" | 5–8 years | 250W | 20 km/h | 15 km | 50 kg | £329.99 |
| Neo Outlaw Surge 18" | 18" | 7–10 years | TBC | TBC | TBC | TBC | £599.99 |
| Neo Outlaw Surge 20" | 20" | 9+ years | TBC | TBC | TBC | TBC | £799.99 |
Neo Outlaw 16" Electric Balance Bike (HP121E) — Best for Ages 5–8
The Neo Outlaw 16" HP121E is the perfect entry point into electric riding. It's built as a balance bike — no pedals, no gears, just pure two-wheeled confidence-building — with a real electric motor to add excitement and progression.
Key Specs
- Motor: 250W 21V brushless
- Battery: Removable 21V 6Ah lithium-ion
- Wheel: 16" 2.4" pneumatic tyre
- Max Speed: 20 km/h
- Range: Up to 15 km per charge
- Charge Time: 4–5 hours
- Max Load: 50 kg
- Weight: 12.9 kg
- Dimensions: 125 x 55 x 65 cm
- Ground Clearance: 15 cm
- Max Climbing: 15°
- Recommended Age: 5 years and older
- Price: £329.99
Who Is It For?
The HP121E is ideal for children who are new to two-wheeled riding. The balance bike format means there are no pedals to worry about — your child simply sits, balances, and uses the throttle to move forward. The 20 km/h top speed is fast enough to be genuinely exciting, but manageable for younger riders with the rear-wheel holding brake providing reliable stopping power.
The removable lithium-ion battery is a standout feature — it pops out like a power tool battery for easy indoor charging, and the 15 km range means a full afternoon of riding on a single charge. The high-strength steel frame keeps weight low at just 12.9 kg, making it easy for parents to lift and transport.
Is the 16" Right for Your Child?
- ✅ Your child is aged 5–8
- ✅ They are new to two-wheeled riding
- ✅ They weigh under 50 kg
- ✅ You want a manageable, confidence-building first electric bike
- ✅ You want a removable battery for easy charging
Spare parts available: We stock a full range of Neo Outlaw 16" HP121E spare parts including replacement batteries, chargers, wheels, control modules, and throttles — so you can keep the bike running for years.
Neo Outlaw Surge 18" — Best for Ages 7–10
The Neo Outlaw Surge 18" is the natural step up from the 16" — designed for children who have outgrown their first electric bike and are ready for more power, more speed, and a bigger, more capable machine.
The larger 18" wheels provide better stability at speed and more confidence on uneven terrain, making this the ideal bike for children who want to start exploring off-road trails, grass, and light dirt tracks.
Who Is It For?
The Surge 18" suits children aged approximately 7–10 who have some riding experience and are ready to push their limits. The larger frame accommodates taller children who have outgrown the 16", and the increased wheel size delivers a noticeably more planted, stable ride — particularly at higher speeds and on rougher ground.
Is the 18" Right for Your Child?
- ✅ Your child is aged 7–10
- ✅ They have some experience on a balance or electric bike
- ✅ They've outgrown the 16" or are on the taller side for their age
- ✅ They want to ride on grass, gravel, or light off-road terrain
- ✅ They're ready for more power and speed than the entry-level model
View the Neo Outlaw Surge 18" →
Neo Outlaw Surge 20" — Best for Ages 9 and Up
The Neo Outlaw Surge 20" is the top of the Neo Outlaw balance bike range — a serious machine for serious young riders. With the largest wheel size in the lineup, this bike is built for older children and confident riders who want maximum performance and the most authentic dirt bike experience possible.
The 20" wheels deliver exceptional stability and roll-over capability on rough terrain, making this the go-to choice for children who want to tackle proper off-road riding — trails, dirt tracks, and open fields.
Who Is It For?
The Surge 20" is designed for children aged 9 and above who are confident, experienced riders looking for a genuine performance electric bike. The larger frame and wheel size suit taller children and those who have progressed through smaller models and are ready for the full off-road experience.
Is the 20" Right for Your Child?
- ✅ Your child is aged 9 or older
- ✅ They are a confident, experienced rider
- ✅ They want the most powerful and capable Neo Outlaw balance bike
- ✅ They plan to ride off-road on trails, dirt, or grass
- ✅ They've outgrown the 18" or are tall for their age
View the Neo Outlaw Surge 20" →
How to Choose: Key Factors Explained
Age vs Height — Which Matters More?
Age guides are a useful starting point, but height and inseam length are more reliable indicators of the right bike size. A tall 7-year-old may be better suited to the 18" than the 16", while a smaller 9-year-old might still be comfortable on the 18". When in doubt, size up slightly — children grow quickly, and a slightly larger bike will last longer.
Riding Experience
If your child has never ridden a two-wheeled bike before, start with the 16" regardless of age (within the recommended range). The balance bike format and lower speed make it the safest and most confidence-building starting point. Children who already have balance bike or bicycle experience can often move straight to the 18".
Where Will They Ride?
All three Neo Outlaw models handle garden riding and smooth paths well. For regular off-road use — grass, gravel, dirt tracks — the 18" and 20" are better suited thanks to their larger wheels and more capable suspension. If your child will mostly ride on flat, smooth surfaces, the 16" is perfectly capable.
Weight Limit
Always check the maximum load for the model you're considering. The Neo Outlaw 16" HP121E has a 50 kg maximum load. Check the product pages for the Surge 18" and 20" for their respective limits before purchasing.
The Neo Outlaw Range: Built for Adventure
Every bike in the Neo Outlaw lineup shares the same design philosophy: real performance, real style, and real off-road capability — scaled for young riders. From the first-time balance bike rider on the 16" to the confident trail rider on the 20", the Neo Outlaw range is built to grow with your child and fuel a genuine passion for riding.
Beyond the Neo Outlaw range, we also stock a full selection of kids' electric dirt bikes, kids' electric motorbikes, and kids' electric quad bikes and buggies for riders ready to take the next step.
Frequently Asked Questions
What age is the Neo Outlaw 16" suitable for?
The Neo Outlaw 16" HP121E is recommended for children aged 5 and older, with a maximum load of 50 kg. It's designed as an entry-level electric balance bike for younger or less experienced riders.
What is the difference between the Neo Outlaw 16", 18", and 20"?
The key differences are wheel size, frame size, and the power and speed each model delivers. The 16" is the entry-level model for younger riders (ages 5–8), the 18" is a step up for ages 7–10, and the 20" is the most capable model for ages 9 and above. Larger wheels provide better stability and off-road performance.
Can my child ride a Neo Outlaw off-road?
Yes — all three Neo Outlaw models are designed with off-road riding in mind. The 16" handles light off-road terrain such as grass and gravel well. The 18" and 20" Surge models are better suited to more demanding terrain including dirt tracks and trails, thanks to their larger wheels and more capable build.
How long does the Neo Outlaw 16" battery last?
The Neo Outlaw 16" HP121E has a range of up to 15 km per charge, with a charge time of 4–5 hours. The battery is removable for easy indoor charging. Check the product pages for the Surge 18" and 20" for their specific battery details.
Do you sell spare parts for Neo Outlaw bikes?
Yes — we stock a comprehensive range of spare parts for the Neo Outlaw 16" HP121E, including replacement batteries, chargers, wheels, control modules, and throttles. For other models, browse our full spare parts collection or contact us for assistance.
Is the Neo Outlaw a good first electric bike?
Yes — the Neo Outlaw 16" HP121E is one of the best first electric bikes available for young riders. The balance bike format removes the complexity of pedals, the 20 km/h top speed is exciting but manageable, and the removable battery makes charging simple. It's a well-built, well-specified bike at a competitive price point.
Which Neo Outlaw is best for an 8-year-old?
It depends on your child's height and experience. An average-sized 8-year-old who is new to electric bikes would suit the 16" HP121E well. A taller or more experienced 8-year-old may be ready to step up to the Surge 18". When in doubt, check the maximum load and frame dimensions on each product page and compare to your child's measurements.
Shop the Neo Outlaw Range
- Neo Outlaw 16" HP121E — from £329.99
- Neo Outlaw Surge 18" — View product
- Neo Outlaw Surge 20" — View product
- Full kids' electric dirt bike range
- Spare parts for all models
Need help choosing? Browse the full kids' electric motorbike collection or contact our team — we're happy to help you find the right bike for your child.
