Quick answer: The RFN Warrior SX-E700 is generally suitable for confident riders aged around 4–8 years old and approximately 100–120cm tall.
Most important: the SX-E700 is the highest-performance model in the RFN Warrior Kids range. Rider confidence, throttle control and braking ability matter more than age alone.
What Age Is the RFN Warrior SX-E700 For?
The RFN Warrior SX-E700 is generally recommended for riders aged around 4–8 years old.
It is designed for children approximately 100–120cm tall and has a seat height of around 490mm, 14-inch wheels and a maximum recommended rider weight of approximately 50kg.
However, the SX-E700 is not simply an alternative to the SX-E500 for every rider within that age and height range.
It is the highest-performance model in the core RFN Warrior Kids range, with up to 700W peak power, hydraulic disc brakes and a top speed of approximately 21.5mph.
This means rider ability and confidence are particularly important.
A confident six-year-old who already has good throttle and braking control may be well suited to the SX-E700. A cautious child of the same age may progress more comfortably on the SX-E500.
RFN Warrior SX-E700 Age and Height Guide
SX-E700 rider guide
- Recommended age: around 4–8 years
- Recommended height: approximately 100–120cm
- Seat height: approximately 490mm
- Bike weight: approximately 20kg
- Maximum rider weight: approximately 50kg
- Wheel size: 14-inch front and rear
- Best rider type: confident or experienced young rider
- Previous model: RFN Warrior SX-E500
- Available versions: SX-E700 MX and SX-E700 SM
The SX-E700 has a similar broad physical size guide to the SX-E500, but it provides more power, a larger battery and hydraulic brakes.
The choice between those bikes should therefore be based primarily on riding ability rather than simply choosing the higher model for more room to grow.
Is the SX-E700 Suitable for a 4-Year-Old?
The SX-E700 may suit a particularly confident and suitably tall four-year-old, but it would not normally be our first recommendation for most riders of that age.
A four-year-old considering the SX-E700 should ideally:
- Be close to or above 100cm tall
- Already have strong two-wheel balance
- Understand twist-throttle control
- Be able to use both brakes correctly
- Have enough strength to support a 20kg bike
- Have previous electric-bike or dirt-bike experience
Although the bike can be restricted to approximately 9.5mph, its weight, acceleration and overall performance make it more suitable for an experienced rider.
For most four-year-olds, the SX-E400 or SX-E500 will provide a more manageable starting point.
Is the SX-E700 Suitable for a 5-Year-Old?
The SX-E700 can suit a confident five-year-old who already has experience on a smaller electric bike.
A five-year-old moving up from the SX-E400, SX-E500 or another electric dirt bike may be ready for the additional performance.
However, a child moving directly from a basic balance bike may still be better suited to the SX-E500.
Good SX-E700 Candidate
- Approximately 100–120cm tall
- Already confident using a twist throttle
- Comfortable using separate front and rear brakes
- Able to stop smoothly and on command
- Experienced on a smaller electric bike
- Ready for stronger acceleration and performance
If those points do not describe the rider, the SX-E500 is likely to be the better all-round choice.
Is the SX-E700 Suitable for a 6-Year-Old?
The SX-E700 is likely to suit many confident six-year-old riders, provided they fall within the height guide and already have good bike control.
At this age, riders who have progressed through smaller electric bikes may benefit from the SX-E700’s larger battery, stronger performance and hydraulic braking system.
A six-year-old who is completely new to throttle-controlled bikes should not automatically start on the SX-E700 simply because their height fits.
The SX-E500 may still provide a better platform for learning and progression.
Read our complete RFN Warrior SX-E500 vs SX-E700 MX comparison before deciding.
Is the SX-E700 Suitable for a 7-Year-Old?
The SX-E700 can be a very strong choice for a confident seven-year-old.
Many riders of this age will have the physical size and coordination needed to manage its 490mm seat height, 14-inch wheels and hydraulic brakes.
A seven-year-old with previous electric-bike or bicycle experience may be ready to use the SX-E700 in Eco mode before gradually progressing into the higher settings.
A smaller or cautious seven-year-old may still get on better with the SX-E500, particularly if they have limited throttle-controlled riding experience.
Is the SX-E700 Suitable for an 8-Year-Old?
The SX-E700 can suit an eight-year-old who remains within the approximate 100–120cm height range.
At this age, physical size is likely to be the main consideration.
A taller eight-year-old may find the SX-E700 compact, even if its performance remains suitable.
The rider should have enough room around the handlebars and footrests and should not appear cramped when seated or standing.
If the rider is significantly above 120cm tall, a larger youth electric bike may be more appropriate than any of the three core RFN Warrior Kids models.
Height and Ability Matter More Than Age
The SX-E700 and SX-E500 share a similar rider-height guide, but they suit different levels of experience.
This makes the SX-E700 unusual within the range: choosing it is not simply about being taller.
The rider should be approximately 100–120cm tall, but they should also be confident enough to manage stronger acceleration, a 20kg bike and a top speed of around 21.5mph.
| Rider Height | Likely Fit | What to Consider |
|---|---|---|
| Below 100cm | Likely too small | Consider the SX-E400 instead |
| 100–110cm | SX-E500 or SX-E700 | Choose based mainly on confidence and experience |
| 110–120cm | Strong physical fit | Confirm that the rider can safely manage the performance |
| Above 120cm | May feel too compact | Consider a larger youth electric bike |
How Important Is the 490mm Seat Height?
The RFN Warrior SX-E700 has a seat height of approximately 490mm.
This is similar to the SX-E500, so seat height alone does not explain the difference between the two models.
The SX-E700’s main upgrades are its motor performance, larger battery, hydraulic brakes and upgraded suspension components.
The rider should be able to sit naturally, reach the controls without stretching and support the bike safely when stopping.
Both feet do not necessarily need to sit completely flat on the ground, but the child should feel stable and in control.
Can the Rider Manage a 20kg Bike?
The SX-E700 weighs approximately 20kg.
Although this is only slightly heavier than the SX-E500, it remains considerably heavier than a traditional electric balance bike.
The rider should have enough strength to:
- Hold the bike upright when stationary
- Turn the handlebars at low speed
- Control the bike during slow manoeuvres
- Use both hydraulic brake levers correctly
- Recover if the bike begins to lean
- Move the bike when the motor is switched off
A child who fits the height guide but struggles with the bike’s weight may be better suited to a smaller or lighter model.
What Riding Experience Should the Child Have?
Previous two-wheel and throttle-controlled riding experience is strongly recommended before moving onto the SX-E700.
Useful previous experience may include:
- The RFN Warrior SX-E500
- The RFN Warrior SX-E400
- An electric balance bike
- Another small electric dirt bike
- A pedal bicycle combined with good braking skills
The ideal rider should already know how to accelerate smoothly, use both brakes and stop without panicking.
They should also understand instructions about riding areas, speed settings and when to stop.
Three Speed Modes for Different Ability Levels
The SX-E700 has three selectable speed modes, allowing parents to control how much performance is available.
SX-E700 speed modes
- Eco: approximately 9.5mph
- Standard: approximately 15.5mph
- Sport: approximately 21.5mph
Eco mode should normally be used when a rider first moves onto the bike.
Standard mode provides a meaningful increase in performance, while Sport mode should only be introduced once the rider consistently demonstrates safe throttle and braking control.
The adjustable modes are useful, but they do not automatically make the SX-E700 suitable for an inexperienced child.
Signs the SX-E700 Is the Right Size and Ability Level
The SX-E700 is likely to be suitable when the rider can:
- Reach the handlebars without stretching
- Reach and operate both hydraulic brake levers
- Support the bike when stationary
- Stand naturally on the footrests
- Accelerate smoothly without grabbing the throttle
- Stop safely and consistently
- Follow instructions from a supervising adult
- Control the bike confidently in Eco mode
The rider should look physically comfortable and remain calm when using the controls.
Signs the SX-E700 May Be Too Powerful
The SX-E700 may offer more performance than the rider currently needs when they:
- Are nervous about using the throttle
- Accelerate abruptly or lose control
- Forget to release the throttle when braking
- Cannot use both brakes correctly
- Struggle to stop on command
- Are frightened by the Eco setting
- Have no previous throttle-controlled riding experience
In these situations, the SX-E500 will normally provide a more manageable learning platform.
Signs the SX-E700 May Be Too Small
The SX-E700 may be physically too small when the rider:
- Is significantly taller than 120cm
- Looks cramped around the handlebars
- Has limited room when standing on the footrests
- Sits with excessively bent knees
- Has already physically outgrown other 14-inch bikes
In this situation, moving to a larger youth model may make more sense than choosing the SX-E700 purely for its performance.
RFN Warrior SX-E500 vs SX-E700 for Rider Age
| Feature | SX-E500 | SX-E700 |
|---|---|---|
| Age Guide | Around 4–7 years | Around 4–8 years |
| Height Guide | Approximately 100–120cm | Approximately 100–120cm |
| Seat Height | Approximately 490mm | Approximately 490mm |
| Best Rider | Confident beginner or developing rider | Confident or experienced rider |
| Top Speed | Approximately 18.5mph | Approximately 21.5mph |
| Battery | 36V 5.2Ah | 36V 7.5Ah |
| Brakes | Mechanical disc brakes | Hydraulic disc brakes |
The SX-E500 and SX-E700 have similar physical sizing, so age and height do not separate them clearly.
Choose the SX-E500 for a developing rider who still needs manageable performance.
Choose the SX-E700 for a rider who already has good throttle and braking control and will benefit from the stronger components.
Does the MX or SM Version Change the Age Guide?
No. The SX-E700 MX and SX-E700 SM share the same general rider age, height, seat height and weight guidance.
The main difference is the tyre configuration.
| Version | Best Terrain | Rider Fit |
|---|---|---|
| SX-E700 MX | Grass, dirt, fields and loose off-road surfaces | Around 4–8 years and 100–120cm |
| SX-E700 SM | Smooth, hard and prepared private surfaces | Around 4–8 years and 100–120cm |
Choose the version according to the rider’s terrain rather than their age.
Read our complete RFN Warrior SX-E700 MX vs SX-E700 SM comparison.
My Take as a British Motocross Rider
The SX-E700 is the clearest example of why you cannot choose a kids electric bike from age alone.
It has a similar physical size to the SX-E500, but it is aimed at a rider with more experience and better control.
A confident six- or seven-year-old who has already spent time on a smaller electric bike may be completely ready for it. A child of the same age who is new to twist throttles may be better starting on the SX-E500.
For me, the SX-E700 is the right choice when the rider fits the bike physically and has genuinely earned the step up in performance.
RFN Warrior SX-E700 Age FAQs
What age is the RFN Warrior SX-E700 for?
The SX-E700 is generally recommended for confident riders aged around 4–8 years old.
What height is the RFN Warrior SX-E700 for?
It is designed for riders approximately 100–120cm tall.
What is the SX-E700 seat height?
The seat height is approximately 490mm.
Is the SX-E700 suitable for a four-year-old?
It may suit an experienced and suitably tall four-year-old, but the SX-E400 or SX-E500 will normally be more manageable.
Is the SX-E700 suitable for a five-year-old?
It can suit a confident five-year-old with previous electric-bike experience and good throttle and braking control.
Is the SX-E700 suitable for a six-year-old?
Yes, many confident six-year-olds within the height guide may be well suited to the SX-E700.
Is the SX-E700 suitable for a seven-year-old?
Yes. It can be a strong option for a seven-year-old who already rides confidently.
Is the SX-E700 suitable for an eight-year-old?
It can suit an eight-year-old who remains within the approximate 100–120cm height guide. Taller riders may need a larger youth bike.
How heavy is the SX-E700?
The bike weighs approximately 20kg.
What is the maximum rider weight?
The maximum recommended rider weight is approximately 50kg.
Does the rider need previous experience?
Previous throttle-controlled electric-bike experience is strongly recommended.
What bike comes before the SX-E700?
The SX-E500 is the natural previous model for developing riders.
Can parents restrict the speed?
Yes. The SX-E700 has speed modes of approximately 9.5mph, 15.5mph and 21.5mph.
Does the MX or SM version change the age guide?
No. Both use the same general age and height guidance. The difference is the tyre setup and intended terrain.
Where can the SX-E700 be ridden?
It is intended for private land and suitable riding areas with the landowner’s permission.
Does the rider need protective equipment?
Yes. A correctly fitting helmet, gloves, suitable boots and protective clothing should be worn, with adult supervision at all times.
Still Unsure Which RFN Warrior Fits?
Our RFN Warrior Kids range explained guide compares the SX-E400, SX-E500 and SX-E700.
RFN Warrior SX-E400
Best for younger riders around 3–6 years and approximately 90–110cm tall.
Shop SX-E400RFN Warrior SX-E500
Best for developing riders around 4–7 years and approximately 100–120cm tall.
Shop SX-E500RFN Warrior SX-E700
Best for confident riders around 4–8 years who are ready for premium performance.
Shop SX-E700Shop the RFN Warrior SX-E700 in the UK
The RFN Warrior SX-E700 is generally best suited to confident riders aged around 4–8 years and approximately 100–120cm tall.
It combines a 490mm seat height and 14-inch wheels with up to 700W peak power, three adjustable speed modes, a larger removable battery and hydraulic brakes.
Because its physical dimensions overlap with the SX-E500, the deciding factor should be rider confidence and ability rather than age alone.
For a child who has progressed beyond smaller electric bikes and is ready for stronger performance, the SX-E700 is the premium model in the RFN Warrior Kids range.