Buying Kids Bikes

How to buy a children’s bike that will last

Children will tolerate, even enjoy, almost any bike…

However, if you get them a good one they’ll keep using it after the initial thrill of having a new bike has faded. Good bikes get used day in, day out, because they’re a pleasure to ride, then get passed down or sold on to eager new users. Bad bikes, on the other hand, slowly decay in sheds and garages, then end up at the dump as their value is low.

Cycle prices don’t simply scale down with size. A child’s bike uses shorter lengths of tubing, but smaller components are not intrinsically cheaper and, unlike clothes, children’s bikes aren’t VAT-free.

However, most children’s bikes are much cheaper because they are built to a price – the kind of price that would buy just a couple of PlayStation games. So, be warned,  lots of children’s bikes are little more than Bicycle-Shaped Objects, offering the appearance of a bike but none of its function, built with low quality, heavy, unnecessary and outdated components.

Cheap and nasty bikes don’t last. They break down and are abandoned. A good bike will still be in use several Christmases later and can be handed down to a brother or sister. So its yearly cost can be a lot less, even if it’s two or three times the price to begin with.”

Dan Joyce
Cycle Magazine Editor

Buying a secondhand children’s bike

Decent children’s bicycles aren’t hugely expensive. You can get a good bike for a five-year-old for around £250, and a really nice one for a 10-year-old for £300-£400 (Prices based on 2015 prices). There are perfectly acceptable bikes available for less, of course, but with new bikes it means sorting the wheat from a much larger volume of chaff. Bargains are rare – unless you buy secondhand.

The local newspaper adverts or eBay can yield good deals, if you know what you’re looking for. If not, minimise the risk of buying a turkey by purchasing from your local bike shop.

A guide to buying the best Balance bike

Balance bikes are small starter bicycles for pre-school children. Like the original bicycle, the ‘running machine’ of Baron Karl von Drais, they lack pedals: the rider scoots along the ground, pushing off with alternate feet, and can lift both to coast.

Using a balance bike teaches a child the skills that make cycling possible: balancing and steering. Many also come with a brake. Pedalling might seem a fundamental skill but is easily incorporated later. A child who starts on a bike with stabilisers will need to learn the more difficult skill of balancing later, and older children may get scared when the stabilisers are taken away. For more information watch our Video: How to teach a child to ride a balance bike.

Things to look for when buying a balance bike:

The lighter the better. For a three year old child weighing 16kg, the 1.6kg difference between the lightest and heaviest bike here is 10% of their bodyweight. Imagine if your bike were 6-8kg heavier! Also, you will end up carrying a balance bike a lot, possibly all the way home from the park

A headset with ball bearings will enable the handlebar to turn easily and freely, unlike a plain bearing. Some balance bikes have a steering damper or stop to prevent jack-knifing. Handgrips must be secure. Bulb-ended grips can stop hands slipping off and prevent injury in a fall.

Shoe soles will stop a balance bike at moderate speeds, but a hand-brake is a useful extra, especially for children who like to whizz around. It also teaches a skill that will be needed later. Make sure your child can actually pull the brake lever: too stiff or too big will only teach them that brakes are useless!

Pneumatic tyres are lighter, more comfortable and roll better, especially over bumps. All the bikes tested have 12-inch (ISO 203) wheels. The wheels themselves should spin easily and freely, which they’ll do best with (correctly adjusted!) ball bearings.

Look for a comfortable and slightly concave saddle to prevent your child from slipping forward. Adjust the saddle height so that your child can put both feet flat on the floor, raising it as he or she grows. A flootplate or rest is useful to stop legs flailing during extended coasting.

Choosing the first pedal bike –  bikes for children aged three to five

It is great to start off using a balance bike, but once your child is confident scooting quickly and stopping, it is time to move on up to a bike with pedals.

A word of warning from Cycling UK Cycle Instructor Julie Rand: if your child is happy on a balance bike, don’t teach them bad habits by moving them on to a bike with stabilisers. For more information watch Cyclingh UK’s Video: How to teach your child to ride a bike.

Low weight and correct proportions are the priorities for a starter bike, which will have 12in or 14in wheels.

What to avoid

Gimmicks – for example, being overbuilt so as to look like a motorbike or with pictures of a children’s TV character – are best avoided.

What to look for

Look for an upright riding position, courtesy of a BMX-style handlebar, a low stand-over height, and short cranks (90-100mm). Smooth pneumatic tyres roll better than knobbly ones, or tyres that have been filled with foam. The wheels, bottom bracket and headset should all use ball bearings instead of stiff or sloppy plain bearings, where plastic turns on plastic.

Gearing will be single-speed, which is fine. The brakes should be easy to operate: do the little finger brake check. V-brakes are effective stoppers, but even better for a starter bike’s rear wheel is a back-pedal brake. A rear brake takes more effort than a front brake due to cable friction and uses the (usually) weaker hand. Using the legs instead overcomes this, and pedalling back to stop is intuitive for a new cyclist.

Dawes Academy 14″ (£209) is part of a range launched in 2014 and is available from West Malling Cycles. Dawes have invested in designing shorter cranks an a unique one-bolt adjustable stem.

Cheaper options won’t be as light or as well made, yet serviceable bikes are available for under £100 if you shop carefully and follow the ‘keep it simple’ maxim.

Bikes for children aged four to six

Taller or older children can perhaps go straight to a 16in-wheel bike from a balance bike. Like 12- and 14in-wheel bikes, all 16in-wheel bikes come with a single-speed gear. The chain stays are too short for derailleur gears to function properly, and they would only confuse a young child in any case. As children of this age won’t be riding far, a single gear is fine.

Requirements are much the same as the smaller bikes: low stand-over; ball bearings; pneumatic tyres; decent brakes. A low-ish bottom bracket will help your child get a foot down when sitting on the saddle – which, as he or she can now ride properly, you’ll be gradually raising. Cranks should be 100-120mm but 125mm isn’t too bad.

You sometimes see cheap bikes in this size range with nasty suspension or monolithic steel frames. Avoid: features like this add unnecessary weight and very little else. As with adult bikes, the less you’re spending, the simpler the bike should be.

Several manufacturers offer simple, aluminium-framed single-speeds at around the £150 mark. West Maling Cycles offer the Dawes Blowfish at £159.

Bikes for children aged six to nine

Gears are the obvious extra for 20in-wheel bikes. While single-speeds are still fine, a 3-speed hub gear is even better: it’s easy to understand, easy to use, and hard to break. Hub gears are more expensive for manufacturers to fit, however, so 5 or 6-speed derailleurs are what you’ll commonly find.

If the bike does have a derailleur, get a derailleur guard for those occasions when the bike is dropped on its side. A kickstand is useful, as young children aren’t good at propping their bikes up. Look for easy-to-use shifters, like Shimano’s RevoShift twistgrip. Cranks will, once again, be too long. You want 110-130mm; 140mm is too big but not ridiculously so.

Some 20in-wheel bikes come with a suspension fork, or even full suspension. There are two disadvantages with these: extra weight; and less money to go round elsewhere. If you’re paying a large amount of money for the bike, then you may find that the suspension fork provided is adequate. However, rigid bikes will still give a better return for your money.

Bikes for children aged eight to twelve

As bikes get bigger and start to feature the kind of components you’d expect on an adult bike, so the price rises too. Good quality 24-inch wheel bikes start at about £300. For that, you can expect a light(ish) weight aluminium frame, aluminium alloy wheels, and brand name V-brakes.

Most mini-mountain bikes from the bigger name brands, including Specialized, Trek, and Giant, will have an 18 or 21-speed drive train and a cheap suspension fork; it may even work adequately.

A better option would be a lighter rigid bike with a wide-range 8-speed cassette and a single chainring: it’s lighter, simpler, easier to use, and more durable. Most children under 10 only end up confused by a front derailleur and the bike invariably ends up with the chain on the smallest chainring and smallest sprocket, where it runs noisily and inefficiently.

Tyres will have off-road tread on most bikes. Children like the look of these but a set of semi-slicks would be a better compromise. The cranks will again be too long: ideally you want 140mm, but could compromise at 150mm.

A few manufacturers offer road (racing) bikes in this size. Look for the components that you would expect, pound for pound, with an entry-level road bike: Shimano Sora gearing, aluminium frame, and so on. Also note that the shorter reach that children prefer requires a short stem and short reach, shallow drops.

If you have a child who is an off-road fanatic, then high quality mountain bikes are also available in this wheel size. West Malling Cycles offer a fantastic range of smaller road and off-road bikes from Kross, as well as some well-built and exciting bikes from Dawes and Claud Butler

Bikes for children aged 12+:

Children aged 12 or 13 are ready for a small-framed adult mountain bike with 26in wheels. Many manufacturers make frames down to 14 or 15in, and some do 12 or 13in frames. Trials fans and serious off-road riders may want the smallest frame for the extra clearance over the top tube, but most teenagers can go straight to 14 or 15in.

Unless it’s specifically aimed at children, resist the temptation to put your 9- or 10-year-old on a 26in-wheel bike just because he or she happens to be able to reach the pedals. He or she will be better off on a 24in-wheel bike, which will probably be lighter and will be easier to control than an adult bike.

The smaller bike should also have more kid-friendly components, such as cranks, whereas even a bike aimed at small adults will typically have average-sized adult cranks (170 or 175mm). Younger teens would be better off on 150 or 160mm.

An adult bike means adult prices: expect to pay from £400 for a sturdily built aluminium hardtail frame with a basic suspension fork. The closer you spend to £500, the more likely it is the bike will have an adjustable suspension fork (for pre-load, at least), an 8-speed rear wheel (hence, 24 gears) and frame mounts for disc brakes. Some even come with cable disc brakes. Don’t forget, though, that less is usually more when it comes to quality. Avoid full suspension entirely unless you’re spending a serious amount of money.

Remember, teenagers are acutely aware of peer pressure and will want a bike that’s considered cool. So, decide what kind of bike they want to ride. .

You’re looking at prices between £350 and £500 here for a bike of good quality. Any cheaper and you’re looking at street/towpath bikes. That’s fine, too, so long as you accept that below £300 you’re best off looking for a bike with no suspension, no disc brakes, fewer gears, and no gimmicks. That is, ‘a bike’ rather than ‘an off-road bike’.

Avoiding heavy children’s bikes

Size and weight need scaling down to suit a child. That sounds obvious but surprisingly some tiny bikes for seven-year-olds are heavier than any adult ones! Bike weight is always a bigger proportion of a child’s bodyweight than an adult’s, often as much as a half or a third instead of around a seventh. That only makes it even more important to reduce it. Weight impacts on the fun and manoeuvrability of a child’s bike. Imagine strapping a couple of breeze blocks to your own bike. That’s the kind of extra weight we’re talking about, in relative terms, on some children’s bikes.

The trickle down of aluminium tubing into the lower price brackets means that many children’s bikes are finally getting lighter. While aluminium isn’t inherently better than steel, the way children’s bikes are built nowadays – cheaply, sturdily, with over-size and odd-shaped tubes – it’s a lot lighter. To check a bike’s weight before you buy, you don’t need to take a set of scales to the shop. Just pick the bike up. Then, with careful supervision, see how easily your child can lift it.

Getting the right size bike for your child

Standard cycle components are made to fit the average sized man. Components for children’s bicycles clearly need shrinking down to suit a smaller rider. Frames and wheels always are, to some extent. With other components, it’s hit and miss.

In particular, cranks are almost always too long. Over-long cranks are ungainly and inefficient. They force the bottom bracket to be higher off the ground to avoid pedal strikes, and this makes it harder to get a foot down from the saddle. As a rule of thumb children need cranks that are roughly one-tenth their overall height, just like adults. So a child 1.2 metres tall needs 120mm cranks.

You can get a more accurate figure using 20 percent of leg length instead. To measure that, don’t use trouser size. Instead, subtract height when sitting against a wall from height standing against a wall. That’s your leg length. A fifth of this figure is the required crank length. The cranks don’t need to match to the exact millimetre but the measurement is a good guide. If in doubt, it’s better to err on the short side than long. The problem is that most manufacturers fit children’s bikes with, at best, whatever cranks ought to be on the next bike size up.

The handlebar should be narrower than the 60cm riser handlebar that you might use on a mountain bike, but this isn’t so critical. A wide handlebar is good for control and in a fairly upright riding position isn’t usually uncomfortable. If it is, you can easily cut the bar shorter with a hacksaw.

Brake levers must be within easy reach and the brakes must be easily operable: children have much weaker grip strength than adults. Check that you can reach and work each brake with one little finger. Hydraulic disc brakes are best but cost too much to be fitted to anything but high-end children’s mountain bikes. Smoothly functioning V-brakes are okay. Grip shift-style twist shifters require less thumb strength than Rapidfire levers, and younger children in particular seem to find them more intuitive.

One measurement that doesn’t scale well to children’s bikes is reach – the distance between the saddle and the handlebars. Most children are happier in a riding position that’s both shorter and more upright than you would adopt, so they need the bars higher and closer. BMX handlebars are excellent on bikes with 20-inch or smaller wheels for that reason.

The growing cyclist

Optimum bike fit comes by progressing in stages, rather than fitting your child onto the biggest bike he or she can pedal. For safety’s sake, your child must be able to get a foot down easily when sitting on the saddle – both feet for learners – and able to stand with both feet flat on the floor while straddling the top tube in front of the saddle. Otherwise there’s an accident there waiting to happen.

Children’s bikes can be divided by wheel diameter into five sizes: under 16 inches, 16 inches, 20 inches, 24 inches and 26 inches. These sizes correspond to approximate age ranges, but you might find your child is ready for (or outgrows) a given size a year or two earlier. Also, bear in mind that the use of different frame designs means that one manufacturer’s 24in-wheel bike might be slightly bigger or smaller than another’s.

You don’t have to buy your child a bike at every wheel size, although that would be ideal. Just be aware that a bike with significantly bigger wheels than those your child is used to will make bike control harder. While a larger wheel will roll over bumps better, it will also be heavier and the steering will be less responsive. The reach to the bars will likely be greater and the bottom bracket will be higher.

Conversely, there will come a time when your son or daughter is just too big for that old bike. Two or three years per bike is fairly typical. You can recoup some of your costs by selling on a used bike, or you can extend its use-life by handing it down to a sibling. A better built, lighter bike with good components will last better and retain higher resale value.

Avoid the temptation to buy something cheap and nasty: a bike that barely gets used isn’t a bargain, however inexpensive it is.

Golden rules for buying a kid’s bike

  1. Don’t buy a bike for your child to grow into. For safety’s sake, it must fit.
  2. Pick it up. Light weight is vital. Look for aluminium tubing or thin (i.e. cricket stump diameter) steel tubes.
  3. Be suspicious of suspension – especially at the rear of the bike. Cheap suspension is dead weight that serves no practical purpose.
  4. Your child must be able to get a foot down easily when sitting on the saddle
  5. More gears are not better. Front derailleurs are superfluous until secondary school.
  6. Consider semi-slick tyres. Knobblies look cool but are hard work.
  7. Riding position should be fairly upright, with handlebars higher than the seat.
  8. Try the brakes using only your little finger. That’s equivalent to a younger child’s grip strength.
  9. If the cranks are much too long, see if they can be exchanged for the next size down at point of sale.
  10. Less is more. You never get something for nothing. Corners will be cut.

Edited from an article which originally appeared at