Quick answer: If you've been looking at a Revvi and want to know what else is out there, the closest Kubbi to each one is straightforward. The K4 is the alternative to the Revvi 12". The K7 Pro is the alternative to the Revvi 16". The K10 Pro covers the 16" XL and the 18". And the K22 is the alternative to the Revvi 20" — with more than twice the motor, for less money.
Below is the honest version: what you'd be swapping, what you'd gain, and what each brand does differently.
Just here for the bikes? See the whole range, sized by rider height rather than age. Browse the range →
Why do customers choose Revvi?
Mostly because they've heard of them. Revvi is a household name in kids' electric bikes, and when a name is the one you already know, it's the one you look at first.
That's a reasonable place to start. It isn't a reason to stop. A familiar name doesn't automatically make a bike the right size for your child, the right power for how they'll ride, or the best value on the shelf — and this page is here so you can check rather than assume.
What parents are actually comparing
When someone starts looking past the first brand they found, it's usually for one of four reasons.
Price. At every tier where the two ranges overlap, there's a gap — and it isn't small at the top end.
Warranty. How long you're covered for, and what "covered" actually means, varies a lot in this category. Worth reading before you buy, not after.
Sizing. Age ranges are a starting point, not an answer. Two eight-year-olds can be 20cm apart. What you want is a rider height and a seat height.
How long it lasts. The maximum rider weight is the number that quietly decides whether a bike is still right in two years, and almost nobody checks it.
Revvi and Kubbi, model for model
Prices and specifications below were checked on 10 September 2026. Both brands update, so check the current figures before you buy.
| Revvi model | Revvi price | Closest Kubbi | Kubbi price | The practical difference |
|---|---|---|---|---|
| Revvi 12" (ages 2–6) | £325 | K4 (ages 3–7) | £289.99 | 150W against 100W, and a 40kg rider limit against 30kg |
| Revvi 16" (ages 5–8) | £449 | K7 Pro (ages 6–10) | £399.99 | 300W against 250W, and a 60kg rider limit against 40kg |
| Revvi 16" XL (6+) | £735 | K10 Pro (ages 8–14) | £599.99 | 800W against 600W, £135 less |
| Revvi 18" (8+) | £849 | K10 Pro (ages 8–14) | £599.99 | 800W against 500W, £249 less |
| Revvi 20" (10+) | £1,099 | K22 (ages 14–18) | £999.99 | 2000W against 800W, and 55km/h against about 35km/h |
The pattern holds all the way up the range: more motor, a higher rider weight limit, and a lower price at every point where the two ranges meet. If you already know which Revvi you were looking at, our Kubbi v Revvi comparison lets you pick the size and see the two side by side.
Warranty: read this bit before you buy either
This is the difference most people don't find until they need it.
Kubbi gives you 12 months, covered by our warranty policy.
Revvi's published warranty is six months, and it's parts only. Their own warranty page describes it as "a parts only warranty! It does not include labour". It also states that the customer covers the cost of returning the item, that normal wear items — tyres, tubes, chains, sprockets, cables, bearings — are excluded, and that no extended warranty is offered.
One exclusion is worth reading twice. According to that same page, the warranty is void if the bike has been used in wet conditions.
For an off-road bike, in Britain, ridden by children. Don't take our word for any of this — every brand publishes its warranty terms, Revvi included. Whoever you end up buying from, find the warranty page and read it before you order rather than after something breaks.
The warranty and returns comparison is set out in full on our Kubbi v Revvi page.
The sizing problem nobody talks about
Revvi size their bikes by age. So do most brands in this category.
The trouble is that age tells you very little about whether a child can get their feet down. That's decided by inside leg against seat height, and it's the single most common reason a bike gets returned in January.
We publish a rider height range, a seat height and a maximum rider weight for every bike:
| Kubbi | Rider height | Seat height | Max rider | Bike weight |
|---|---|---|---|---|
| K4 | 80–115cm | 45cm | 40kg | 11.2kg |
| K7 Pro | 100–145cm | 58cm | 60kg | 17kg |
| K10 Pro | 120–155cm | 67cm | 90kg | 32kg |
| K22 | 128–179cm | 78cm | 100kg | 46kg |
How to use it at home. Measure your child's inside leg — floor to the top of the inner thigh — and compare it to the seat height. You want the balls of both feet down comfortably when they're sat on the seat. Flat feet is better still for a nervous first-timer. You don't need the bike in front of you, which matters when you're buying online.
There's a fuller walk-through in our Christmas fit guide, and our bike quiz will do it with you.
So which Kubbi should I get instead?
Instead of a Revvi 12" — the Kubbi K4
The entry point for both brands, and the closest match in the range. The K4 is £289.99 against £325, runs a 150W motor against 100W, and takes a 40kg rider against 30kg — which is the number that decides how long you get out of it.
Two speed settings, 8 and 15km/h, both set by you. Real brakes, pneumatic off-road tyres, and 11.2kg of bike that a small child can pick up when they drop it.
Best for a first-time rider anywhere from about 80cm to 115cm tall. If they're at the younger end, read Electric Bike for Toddlers: Is Your Child Ready? first.
Instead of a Revvi 16" — the Kubbi K7 Pro
Our best-seller. The K7 Pro is £399.99 against £449, a 300W motor against 250W, three speed modes instead of a fixed pair, and a 60kg rider limit against 40kg — so it stays right for considerably longer.
Best for a primary-school rider with a bit of confidence, anywhere from about 100cm to 145cm tall. If your child is at the very bottom of that range, measure against the 58cm seat before you decide — the K4 may still be the better first bike.
Instead of a Revvi 16" XL or 18" — the Kubbi K10 Pro
This is where the gap opens up. The K10 Pro is £599.99 with an 800W motor. The Revvi 16" XL is £735 with 600W; the Revvi 18" is £849 with 500W.
So you're looking at more power than either, for £135 to £249 less. Add dual suspension, three speed modes topping out at 30km/h, and a 90kg rider limit against their 50kg.
If your child has started saying "scrambler", this is the one — there's a full guide to electric scramblers for kids.
Instead of a Revvi 20" — the Kubbi K22
The clearest comparison in the range. The K22 is £999.99 with a 2000W motor and 55km/h at the top setting. The Revvi 20" is £1,099 with 800W and around 35km/h.
More than twice the motor, meaningfully faster, and a hundred pounds cheaper. Full-size frame, hydraulic brakes, roughly 50km of range, and parental speed controls that still work at that power — you set what they can reach.
Best for a confident teenage rider, or anyone stepping up from a smaller off-road bike.
Frequently asked questions
Is Kubbi cheaper than Revvi?
At every tier where the two ranges overlap, yes — from about £35 at the entry point to £249 at the K10 Pro against the Revvi 18". Prices on both sides change, so check both before you buy.
Are Kubbi and Revvi bikes the same kind of thing?
Close, but not identical. Revvi describe theirs as electric balance bikes; ours are electric dirt bikes. In practice both are throttle-driven with no pedals across the smaller sizes, so a child rides them the same way. Ours are built more like a scaled-down motocross bike, which is where the extra power comes from.
Which is better for a five-year-old?
Measure first. At five you're likely between our K4 and K7 Pro, and the deciding factor is whether they can get their feet down at a 45cm or a 58cm seat — not their birthday.
Are either of them road legal in the UK?
No, and that's true of every brand in this category. They're for private land with the landowner's permission. Full detail in our guide to where kids can legally ride.
Can I get spare parts for a Kubbi?
Yes. We hold them in our own warehouse in Northern Ireland and list them per model on our spare parts page — batteries, motors, controllers, throttles, fenders, kickstands and brake levers, bike by bike.
How quickly can I get one?
We hold stock ourselves and ship across the UK and the Republic of Ireland. Delivery times and courier detail are on our shipping policy.
The bottom line
If a Revvi is on your shortlist, it's worth putting a second bike beside it before you decide.
On price, motor power, rider weight limit and warranty length, the comparison goes our way at every tier where the two ranges meet. On sizing, we publish the numbers you need to measure against at home.
Measure your child, compare the two properly, and buy the one that fits.
Revvi prices, specifications and warranty terms in this article were taken from revvi.co.uk on 10 September 2026 and may have changed since. Kubbi prices are correct at the time of writing — see our product pages for current figures.