Find the perfect electric bike for your rider

Answer four quick questions — inside leg, age, riding style and experience — and we’ll match your child to the bikes that fit them best.

  • Fast UK delivery
  • Rated 5 stars by parents
  • Spare parts & expert support
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Bike finder

Step 1 of 4

What is your child’s inside leg measurement?

Measured from the floor to the top of their inner leg, without shoes. This tells us which seat heights let them sit with both feet flat on the ground. How do I measure this?

cm

Our full range

RFN Youth Warrior SX-E8 Electric Motorcross Bike

RFN Youth Warrior SX-E8 Electric Motorcross Bike

  • Age: 8–12 years
  • Seat height: 76.5–86.5 cm
  • Inside leg: 76.5 cm–86.5 cm
  • Wheels: 14/12"
  • Power: 8KW - 10HP / 270N.M

£2,895.00

Colour: Black/Grey

RFN Youth SX-e5000 Red/Blue side view

RFN Youth Warrior SX-E5 Electric Motorcross Bike

  • Age: 6–10 years
  • Seat height: 63.5–73.5 cm
  • Inside leg: 63.5 cm–73.5 cm
  • Wheels: 12/10"
  • Power: 5KW Peak / 7HP - 145N.M

£1,895.00

Colour: Red/Blue

RFN Warrior SX-E700 R

RFN Warrior SX-E700 R

  • Age: 4–8 years
  • Seat height: 51.0–61.0 cm
  • Inside leg: 51.0 cm–61.0 cm
  • Wheels: 14"
  • Power: 500W up to 21.5 mph

£799.00

Color: Red/Blue

A blue and red electric dirt bike with black tires and handlebars, shown from a three-quarters angle on a plain white background.

RFN Warrior SX-E500 Electric Bike

  • Age: 4–8 years
  • Seat height: 51.0–61.0 cm
  • Inside leg: 51.0 cm–61.0 cm
  • Wheels: 14"
  • Power: 350W up to 18 mph

£649.00

Color: Red/Blue

A small electric dirt bike with a blue, red, and black color scheme, featuring knobby tires and a central battery pack, shown on a plain white background.

RFN Warrior SX-E400 Electric Bike

  • Age: 3–6 years
  • Seat height: 48.0–58.0 cm
  • Inside leg: 48.0 cm–58.0 cm
  • Wheels: 12"
  • Power: 250W up to 15.5 mph

£499.00

Color: Red/Blue

NEW Revvi 24" New For 2026

Revvi 24" New For 2026

  • Age: 12+ years
  • Seat height: 77.0–94.0 cm
  • Inside leg: 77.0 cm–99.0 cm
  • Wheels: 24"
  • Power: 1000W up to 30 mph

£1,598.99

NEW Revvi 20" Plus New For 2026

Revvi 20" Plus New For 2026

  • Age: 10+ years
  • Seat height: 71.0–88.0 cm
  • Inside leg: 71.0 cm–93.0 cm
  • Wheels: 20"
  • Power: 1000W up to 27 mph

£1,399.00

Popular Revvi 20 Inch in black - future riders

Revvi 20" Electric Balance Bike

  • Age: 10+ years
  • Seat height: 68.5–86.5 cm
  • Inside leg: 68.5 cm–91.0 cm
  • Wheels: 20"
  • Power: 800W up to 22 mph

£1,098.99

Color: Black

Best Seller New Revvi 18 inch In Black Future Riders

Revvi 18" Electric Balance Bike

  • Age: 8+ years
  • Seat height: 66.0–84.0 cm
  • Inside leg: 66.0 cm–89.0 cm
  • Wheels: 18@
  • Power: 500W up to 20 mph

£848.99

Color: Black

NEW Revvi 16" XL Electric Balance Bike

Revvi 16" XL Electric Balance Bike

  • Age: 6+ years
  • Seat height: 61.5–66.5 cm
  • Inside leg: 61.5 cm–71.0 cm
  • Wheels: 16"
  • Power: 500W up to 17.5 mph

£734.99

Color: Blue/Black

Revvi 16 inch Plus In Blue Future Riders

Revvi 16" Plus Electric Balance Bike

  • Age: 5–9 years
  • Seat height: 44.0–53.0 cm
  • Inside leg: 44.0 cm–58.0 cm
  • Wheels: 16"
  • Power: 250W up to 12 mph

£558.99

Color: Black

Revvi 16 inch In Blue Future Riders

Revvi 16" Electric Balance Bike

  • Age: 5–8 years
  • Seat height: 43.0–50.0 cm
  • Inside leg: 43.0 cm–55.0 cm
  • Wheels: 16"
  • Power: 250W up to 12 mph

£448.99

Color: Black

Revvi 12 inch In Blue Future Riders

Revvi 12" Electric Balance Bike

  • Age: 2–5 years
  • Seat height: 36.0–39.5 cm
  • Inside leg: 36.0 cm–44.0 cm
  • Wheels: 12"
  • Power: 100W up to 10 mph

£324.95

Color: Blue/Black

NEW Amped A24 Comp

Amped A24 Comp

  • Age: 10+ years
  • Seat height: 77.0–87.0 cm
  • Inside leg: 77.0 cm–92.0 cm
  • Wheels: 24"
  • Power: 1500W up to 31.5 mph

£1,799.00

NEW Amped A20 Comp

Amped A20 Comp

  • Age: 8+ years
  • Seat height: 67.0–77.0 cm
  • Inside leg: 67.0 cm–82.0 cm
  • Wheels: 20"
  • Power: 1000W up to 28 mph

£1,299.00

Amped A20 Pro white

Amped A20 Pro

  • Age: 7–12 years
  • Seat height: 58.0–68.0 cm
  • Inside leg: 58.0 cm–73.0 cm
  • Wheels: 20"
  • Power: 800W up to 28 mph

£899.00

Color: White

Amped A20 in Black

Amped A20 - Electric Balance Bike

  • Age: 7–12 years
  • Seat height: 65.0–75.0 cm
  • Inside leg: 65.0 cm–80.0 cm
  • Wheels: 20"
  • Power: 300W up to 19.5 mph

£549.00

Color: Black

NEW Amped A18 Comp

Amped A18 Comp

  • Age: 7–11 years
  • Seat height: 65.0–75.0 cm
  • Inside leg: 65.0 cm–80.0 cm
  • Wheels: 18"
  • Power: 800W up to 24 mph

£1,099.00

Amped A16 Pro in white front side view

Amped A16 Pro 400w Electric Balance Bike

  • Age: 5–9 years
  • Seat height: 52.0–60.0 cm
  • Inside leg: 52.0 cm–65.0 cm
  • Wheels: 16"
  • Power: 400W up to 18 mph

£699.00

Color: Black

New Amped A16 in Black

Amped A16 - Electric Balance Bike

  • Age: 4–8 years
  • Seat height: 40.0–48.0 cm
  • Inside leg: 40.0 cm–53.0 cm
  • Wheels: 16"
  • Power: 320W up to 12.5 mph

£450.00

Color: White

Electric balance Bike - Amped A10 In White at Future Riders

Amped A10 - Electric Balance Bike

  • Age: 3–6 years
  • Seat height: 36.0–40.0 cm
  • Inside leg: 36.0 cm–45.0 cm
  • Wheels: 10"
  • Power: 150W up to 7 mph

£395.00

Color: White

Why the right size matters

A bike that fits builds confidence; a bike that’s too big knocks it. Your child should be able to sit on the saddle with both feet flat on the floor and reach the bars with a slight bend in their arms.

Resist the temptation to buy a size up “to grow into” — every bike here has an adjustable seat, so the right size today still has plenty of headroom for growth spurts.

Safety, speed modes & where to ride

Every bike in our range has selectable speed modes, so you decide how fast it can go — start in eco (walking pace on the smallest bikes) and unlock more speed as skills grow.

A properly fitted helmet is a must every ride; gloves, boots and long sleeves are a smart idea off-road. These bikes are designed for private land and off-road use with the landowner’s permission — they’re not road legal.

Batteries, charging & ride time

Every bike comes with one battery. Depending on the model, mode and terrain you’ll typically get 40–90 minutes of riding per charge.

Batteries are removable and swap in around 20 seconds, and can be charged on or off the bike — so a spare battery means one charges while the other is out riding.

How to measure your child’s inside leg

1. Ask your child to stand against a wall without shoes, feet slightly apart.

2. Place a hardback book between their legs, spine up, snug against their body.

3. Measure from the floor to the top of the book in centimetres — that’s their inside leg.

For a safe, confident fit the bike’s minimum seat height should be no taller than their inside leg, so they can sit with both feet flat on the ground.

Mascot showing inside leg measurements

Bike size chart

Bike Age Inside leg Seat height Wheels
RFN Youth Warrior SX-E8 Electric Motorcross Bike 8–12 years 76.5–86.5 cm 76.5–86.5 cm 14/12"
RFN Youth Warrior SX-E5 Electric Motorcross Bike 6–10 years 63.5–73.5 cm 63.5–73.5 cm 12/10"
RFN Warrior SX-E700 R 4–8 years 51.0–61.0 cm 51.0–61.0 cm 14"
RFN Warrior SX-E500 Electric Bike 4–8 years 51.0–61.0 cm 51.0–61.0 cm 14"
RFN Warrior SX-E400 Electric Bike 3–6 years 48.0–58.0 cm 48.0–58.0 cm 12"
Revvi 24" New For 2026 12+ years 77.0–99.0 cm 77.0–94.0 cm 24"
Revvi 20" Plus New For 2026 10+ years 71.0–93.0 cm 71.0–88.0 cm 20"
Revvi 20" Electric Balance Bike 10+ years 68.5–91.0 cm 68.5–86.5 cm 20"
Revvi 18" Electric Balance Bike 8+ years 66.0–89.0 cm 66.0–84.0 cm 18@
Revvi 16" XL Electric Balance Bike 6+ years 61.5–71.0 cm 61.5–66.5 cm 16"
Revvi 16" Plus Electric Balance Bike 5–9 years 44.0–58.0 cm 44.0–53.0 cm 16"
Revvi 16" Electric Balance Bike 5–8 years 43.0–55.0 cm 43.0–50.0 cm 16"
Revvi 12" Electric Balance Bike 2–5 years 36.0–44.0 cm 36.0–39.5 cm 12"
Amped A24 Comp 10+ years 77.0–92.0 cm 77.0–87.0 cm 24"
Amped A20 Comp 8+ years 67.0–82.0 cm 67.0–77.0 cm 20"
Amped A20 Pro 7–12 years 58.0–73.0 cm 58.0–68.0 cm 20"
Amped A20 - Electric Balance Bike 7–12 years 65.0–80.0 cm 65.0–75.0 cm 20"
Amped A18 Comp 7–11 years 65.0–80.0 cm 65.0–75.0 cm 18"
Amped A16 Pro 400w Electric Balance Bike 5–9 years 52.0–65.0 cm 52.0–60.0 cm 16"
Amped A16 - Electric Balance Bike 4–8 years 40.0–53.0 cm 40.0–48.0 cm 16"
Amped A10 - Electric Balance Bike 3–6 years 36.0–45.0 cm 36.0–40.0 cm 10"

Sizing & buying FAQs

Should I choose a bike by my child's age or their height?

Go by your child'sinside leg first, then use age as a rough guide. Two children the same age can be completely different sizes, so age alone is the least reliable way to choose. Our bike selector asks for their inside leg measurement so we can match them to bikes they can sit on with both feet flat on the floor— the golden rule for a confident fit. Measure their inside leg, pop it into the selector, and we'll do the rest.

How do I measure my child's inside leg?

Stand your child against a wall without shoes, feet slightly apart. Place a hardback book between their legs, spine up, snug against their body, then measure from the floor to the top of the book in centimetres — that's their inside leg. For a safe, confident fit, the bike's minimum seat height should be no taller than their inside leg, so they can sit with both feet flat on the ground. Enter the number in our bike selector (or check our How to Measure & Size Guide) and we'll show every model that fits.

What's the difference between an electric balance bike and an ordinary balance bike?

An ordinary balance bike has no pedals and no motor — your child pushes along with their feet to learn balance and steering. An electric balance bike(like the Revvi and Amped models we stock) works exactly the same way but adds a twist throttle and a motor, so once they've mastered balancing they can ride further and faster without tiring. Cleverly, several of our bikes can be ridden with the power off as a conventional balance bike first, then switched to the lowest speed setting as confidence grows — so one bike takes them from first wobble to full throttle.

Balance bike, stabilisers or electric — what should we start with?

For a first-timer under about 3, a simple balance bike is the best start: it teaches balance early, and children who learn this way usually skip stabilisers altogether and move to two wheels far more smoothly. Stabilisers keep a bike upright but don't teach balance, so many children have to relearn it later when they come off. If your child has already cracked balancing, an electric balance bike is a brilliant next step — the throttle keeps them motivated and riding for longer. Answer the "experience" question in our bike selector and we'll point you to the right starting point.

Should I size up so my child can "grow into" the bike?

We'd honestly advise against it. A bike that's too big is harder to control, knocks a child's confidence and can lead to falls — the opposite of what you want. Every bike we sell has an adjustable seat, so the right size today still leaves plenty of headroom for growth spurts. And if your child falls between two sizes, choose the smaller one: it's easier to learn on and control, and you'll usually see faster progress. Our bike selector factors all of this in automatically when it matches their inside leg.

Does the weight of the bike matter?

Yes — for younger riders it's one of the most important factors. A bike that's too heavy is tiring to control, harder to pick up after a tumble and simply less fun, which can put children off riding. As a rule of thumb, a child's bike should weigh well under a third of their body weight. Our electric balance bikes are built to be as light as possible for their class — the Revvi 12" weighs just 9kg (with a maximum rider load of 30–34kg) — so little riders can handle them with confidence. Each product page lists the exact weight so you can compare.

Are these electric bikes road legal in the UK?

No — the electric bikes we sell are designed for private land and off-road use only, with the landowner's permission. Under UK rules, you must be 14 or over to ride an electric bike on public roads(per GOV.UK's Riding an electric bike guidance), and these throttle-controlled bikes sit outside the standard "electrically assisted pedal cycle" rules anyway — so they aren't for roads, pavements or cycle paths. For private, off-road use they don't need registration, tax or insurance. Always supervise young riders, kit them out properly, and make sure you have permission for wherever you ride.

How fast do they go, and can I limit the speed?

Every bike in our range has selectable speed modes, soyou decide how fast it can go. Start beginners in the lowest/eco mode — walking pace on the smallest bikes — and unlock more speed as their skills and confidence grow. Top speeds vary by model: the Amped A10 tops out at around 7mph, the Revvi 12" offers a 5mph "slow" mode and a 10mph "fast" mode, and the larger Revvi, Amped and RFN bikes go quicker again. Each product page lists the exact modes so you can match the bike to your child's ability.

How long does the battery last, and can I get a spare?

It depends on the model, speed mode and terrain, but as a guide the Revvi 12" gives up to around 1 hour 15 minutes on low speed, or roughly 40 minutes on high speed per charge; larger bikes vary. The batteries are removable and swap in seconds, and can be charged on or off the bike — so a spare battery means one charges while the other is out being ridden. To keep the battery healthy, charge indoors at room temperature with the supplied charger, unplug once it's full, and store it part-charged over winter. We stock spare batteries and chargers for every brand we sell.

Do kids have to wear a helmet, and do you sell safety gear?

In mainland Great Britain there's no law requiring children to wear a cycle helmet— the Highway Code strongly recommends one but doesn't mandate it (note that helmetsarelegally required for children in Northern Ireland and Jersey). Whatever the law, we'd never let a child of ours ride without a properly fitted helmet — it's a must every single ride. For off-road riding, gloves, long sleeves and body protection are a smart idea too. We stock kids'helmets (including full-face MTB options), gloves, jerseys and body armour, and you can add them as a matching kit right inside the bike selector.

How much is delivery, and what are your returns, warranty and finance options?

Delivery is free to the UK mainland (England, Wales and Scotland), sent by tracked courier with a signature required, so please make sure someone's in to receive it. Revvi, Amped, RFN and BERG bikes arrive boxed and need some home assembly— we have step-by-step how-to-build videos on our YouTube channel to make it easy. You have 30 days to request a return if the item is unused and in its original packaging. Our bikes come with a 6-month manufacturer's warranty covering manufacturing defects on major parts (a parts-only warranty — it doesn't cover wear-and-tear items such as tyres, tubes, chains or cables), and you can spread the cost with Klarna at checkout. Not sure on any of it? Our friendly team is one message away.

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Future Riders Limited 

Company Number 15767488

VAT Number 482050411

Registered Office 5A Ack Ln E, Bramhall, Stockport SK7 2BE