Revvi 18 Seat Height & Rider Size Guide
The Revvi 18 is one of the strongest all-round progression bikes in the Revvi range. With an adjustable seat height of approximately 67–74cm, 18-inch wheels, full suspension and hydraulic brakes, it suits confident riders who have outgrown the smaller 16-inch models but may not yet need the larger Revvi 20.
Buying for a regular rider? The Revvi 18 riding gear and spare battery bundles are often the best-value way to complete the setup.
View Bundle OptionsHow tall is the Revvi 18 seat?
The Revvi 18 seat adjusts from approximately 67cm at its lowest position to 74cm at its highest. It is generally best suited to confident riders around 130–155cm tall and approximately 8–12 years old.
Measure vertically from level ground to the saddle
The 67–74cm seat-height range is measured from level ground to the top of the saddle. Start at a lower position while the rider becomes familiar with the bike, then raise it gradually as their height and confidence grow.
The correct setup should allow secure ground contact, relaxed arms and enough room to turn the handlebars comfortably.
Revvi 18 sizing specifications
The Revvi 18 is where the range starts to feel like a proper larger electric motorbike rather than a compact balance-style bike.
| Measurement | Revvi 18 | What It Means |
|---|---|---|
| Adjustable seat height | Approx. 67–74cm | A taller and roomier riding position than the 16-inch models. |
| Wheel size | 18 inches | More stability and physical space for growing riders. |
| Typical rider height | Approx. 130–155cm | Best suited to older or taller progressing riders. |
| Typical age guide | Approx. 8–12 years | Age is guidance only; fit and confidence matter more. |
| Bike weight | Approx. 20kg | The rider should be able to support and manoeuvre it confidently. |
| Motor | 36V 500W brushless hub motor | Strong step-up performance without moving to the Revvi 20. |
| Speed settings | Approx. 9.5 / 13.5 / 20mph | Three-stage progression for building control. |
| Brakes | Front and rear hydraulic discs | Consistent braking as speed and rider confidence increase. |
| Battery | 36V 5Ah removable lithium | Easy to remove, charge and swap when using a spare battery. |
Why the Revvi 18 is such a strong sweet spot
It gives a rider the bigger wheels, roomier chassis and proper suspension feel they need for progression, without immediately moving them onto the larger Revvi 20 platform.
Who is the Revvi 18 best suited to?
The Revvi 18 is ideal for a confident rider who has outgrown smaller Revvi models and now wants a more stable, grown-up electric motorbike feel.
Physical fit
The rider should reach the ground and controls without stretching or leaning the bike.
Previous experience
They should already understand throttle control, braking and basic off-road balance.
Bike control
They should be able to support and manoeuvre an approximately 20kg bike confidently.
Choose the Revvi 18 when:
- The rider is approximately 130–155cm tall
- They have outgrown a Revvi 16 or 16 XL
- They want more stability and physical room
- They are ready for hydraulic brakes and full suspension
- The Revvi 20 still feels unnecessarily large
- You want the strongest all-round Revvi progression option
Avoid the Revvi 18 when:
- The rider is still learning basic balance
- They cannot reach the ground securely
- The bike feels heavy or intimidating
- The Revvi 16 XL already provides enough room
- The rider is tall enough to need the Revvi 20
- You want maximum performance from an 18-inch bike rather than balanced progression
How to measure your child for a Revvi 18
Measure with the rider's normal footwear on a flat floor.
Stand naturally
Ask the child to stand against a wall with their feet slightly apart.
Use a book
Place a book between the legs and raise it gently to simulate a saddle.
Measure downward
Measure vertically from the top of the book to the floor.
Do not match inseam and seat height too tightly
The published figure is measured with the bike stationary. Saddle width, suspension sag, footwear and riding posture all affect real-world reach.
A progressing rider should still have enough ground contact to stabilise and stop the bike confidently.
Revvi 16 XL vs Revvi 18 vs Revvi 20
The Revvi 18 is the sweet-spot progression model between the compact, performance-focused 16 XL and the larger long-term Revvi 20 platform.
| Comparison | Revvi 16 XL | Revvi 18 | Revvi 20 |
|---|---|---|---|
| Typical rider | Smaller confident rider | Most progressing riders | Taller or older confident rider |
| Wheel size | 16 inch | 18 inch | 20 inch |
| Typical age | Approx. 6–9 | Approx. 8–12 | Approx. 10–14 |
| Motor | 24V 600W | 36V 500W | 36V 800W |
| Top speed | Approx. 17.5mph | Approx. 20mph | Larger, more powerful platform |
| Ride character | Compact and performance-focused | Stable, manageable and balanced | Bigger, more planted and longer-term |
| Best reason to choose | Maximum capability on 16-inch wheels | Best all-round progression step | More room and long-term headroom |
Our recommendation
Choose the Revvi 16 XL when the rider is confident but still physically better matched to a compact 16-inch platform.
Choose the Revvi 18 for the best balance of control, stability, capability and progression.
Choose the Revvi 20 when the rider is genuinely taller, older or ready for a larger long-term bike.
Complete the Revvi 18 with the right bundle
The Revvi 18 is likely to be ridden regularly, which makes both suitable protective equipment and spare battery capacity especially worthwhile.
Revvi 18 + Riding Gear Bundle
Best for: riders who still need a complete protective setup.
- Revvi 18 electric bike
- Revvi full-face helmet
- Revvi riding jersey
- Revvi long-finger riding gloves
- A saving compared with buying the items separately
This is the easiest option for a first complete setup.
Revvi 18 + Spare Battery Bundle
Best for: longer sessions, regular weekend use and keen riders.
- The bike's standard 36V 5Ah battery remains included
- A compatible spare battery is supplied as well
- Swap batteries instead of stopping to recharge
- More usable riding time during trips and practice days
- One of the most useful upgrades for this model
For a rider who already owns suitable gear, this is the bundle we would push hardest.
Which Revvi 18 bundle should you choose?
Choose the riding gear bundle when the child still needs a helmet, jersey and gloves.
Choose the spare battery bundle when protective kit is already covered and longer ride time matters most.
My view on Revvi 18 sizing
My take as a British motocross rider
The Revvi 18 is probably the sweet spot of the range for many progressing riders. It feels much more like a proper electric motorbike than the smaller models, but it is still manageable enough to build confidence.
I would choose it over the Revvi 20 for most riders moving up from a 16-inch bike. The biggest sizing mistake is usually going too large too early. The Revvi 18 gives a strong step forward without demanding that the rider immediately adapt to the biggest platform.
Revvi 18 seat height FAQs
What is the seat height of the Revvi 18?
What rider height is the Revvi 18 suitable for?
What age is the Revvi 18 for?
Is the Revvi 18 suitable for a beginner?
Should I choose the Revvi 16 XL or Revvi 18?
Should I choose the Revvi 18 or Revvi 20?
How fast is the Revvi 18?
What motor does the Revvi 18 use?
Does the Revvi 18 have hydraulic brakes?
How long does the Revvi 18 battery last?
Which Revvi 18 bundle is best?
Can the Revvi 18 be used on public roads or pavements?
Explore more Revvi 18 guides
Ready to choose the Revvi 18?
Shop the bike-only option or complete the setup with a riding gear or spare battery bundle for better overall value.
Off-road use only on suitable private land with the landowner's permission. Rider suitability should be assessed individually. Always use appropriate protective equipment and responsible adult supervision. Measurements are approximate and specifications may be updated.