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Kids Bike Buying Guide

Buying your child a bike can be an exciting time for both you and them, as this is their first chance to experience the enjoyment of cycling. Everyone remembers their excitement when they first swung a leg over a bike and felt the wind through their hair. The realisation that you can explore further, easier and faster than ever before is mind blowing. Choosing the right bike is vital to ensuring they have positive and reassuring first impressions. 

 There are so many different styles to choose from, how do you know which one is the best? Well, it's all about where your child wants to ride, how they will use the bike and what terrain they will be riding on. 

Some people might prefer a mountain bike because they like to go off-road, or maybe someone has always wanted to ride their bike down the street on the pavement. You might notice that some bikes come with training wheels and others don't.

This article will help you understand what kind of bike would work best for your child by considering their age, height, weight, skill level and other factors, including price range.



Buying the right size bike is integral to ensuring your child has the most enjoyable experience possible. While we all understand that kids grow extremely fast and parents don’t want to purchase a new bike every year, a bike that’s too big may have some serious negative effects. It is about promoting the healthy lifestyle of cycling to your child and showing them how bikes can change their lives.

If a bike is too big, hopping on and off the bike will become a difficult and scary experience for your child. A bigger bike will become intimidating as it is harder to control and less stable for the rider. These negative effects will reduce confidence and enjoyment, which will deter them from riding the bike. 

We recommend buying a bike that fits your child at the time. If your child is in between sizes, it is better to look at the bigger size to ride it comfortably. If your child is already a confident and skilled rider, they can often ride a bigger bike than a child who is less comfortable on a bike. 

When considering size, we also recommend considering the weight of a bike. The lightest bike you can purchase within your budget is the best bike to get. A more lightweight bicycle is easier to pedal, control and leads to a more enjoyable ride for your children. 


Many people begin their journey towards buying their children a bike by using their age as a measure. Unfortunately, not all children at the age of 5 are the same height, neither are children at age 7 or 1,0 etc. Using your child's inseam is the best way to decide what size they need.


Kids Bike Sizes Chart showing sizing by wheel size, age, inseam, and height


Children's bikes come in as many varieties as adult bikes these days. It is important to understand the style of riding your child wants to do. For example, if your child wants to get into mountain biking or off-road, riding a flat bar commuter style bike will be dangerous and not be up to the rigorous riding. It is best to get a deep understanding of what your child will be riding. 

It is also important to be realistic about the riding they will be doing. Sometimes you will find that your child wants a mountain bike or a BMX but, if they are predominantly commuting on the streets, it could end up being a less enjoyable ride for them. 

Let's go through our range of kids bikes and what they are best for.



Comfort or “cruiser” bikes are exactly as the name suggests, designed for comfort and cruising. These bikes provide an upright and comfortable riding position for kids looking to ride leisurely. They are not designed for speed or efficiency. They are designed to be ridden on leisurely rides to school, the movies or just along the beach with their parents. 

Comfort bikes usually have racks and baskets from the factory. They are optimum for carrying books, clothes, or toys. They also have mudguards and the required accessories to keep your child as dry as possible if the weather turns bad. 

If your child wants a more efficient bike for commuting to school or something faster on the road, a flat bar road-style bike will be better suited. An MTB will be much better if they want to go off-road and get rowdy on rough terrain. 


Rigid mountain bikes are perfect for smaller children to ride wherever they choose. Because children are so light and small, when a tire is inflated to the correct pressure, it provides more than enough traction and comfort.  They are the perfect entry point for those with a passion for exploring.

These bikes have been designed around hardtail mountain bikes, so the bikes remain stable yet fun to ride. They have no suspension to reduce the weight, enhance efficiency and reduce costs. Thanks to the cost savings, you can often see better components on the rest of the bike. Often with one gear up front and 8 at the back, they are the perfect bike for kids needing gears.

If your child wants to explore the town, experience the freedom a bike provides and enjoy the sensation of speed, these bikes are perfect for your child. They are versatile and a great way to see which style of riding they gravitate to the most/  If they want to get more serious off-road, a mountain bike would be better suited for them.




Hardtail mountain bikes have front suspension but a solid rear end. They give your children a new avenue of riding to explore. Instead of jumping in puddles, your child can now ride through them as fast as possible.

Stronger tires with a knobbly texture provide extra traction with increased puncture protection. They have front suspension to help absorb the bumpy roots and rocks. Disc brakes are more powerful, more reliable and safer than their v-brake siblings. Hardtail mountain bikes are the perfect entry point for children who want to push boundaries and explore the outdoors.

The downside to these extra features like suspension and stronger components is weight. Hardtail mountain bikes are heavier than your city bikes or rigid mountain bikes. Wider and knobby tires have increased drag and are harder to pedal for longer distances. Our dual suspension bikes may be better suited if your child wants to explore the outdoors more and take on more difficult terrain. If they want a more efficient ride, check out our city bikes.





Dual Suspension mountain bikes are primarily designed for off-road use. With both front and rear suspension, both wheels move with the terrain for increased traction and safety. As your child begins to charge harder, they need the improved performance of our D24 range.

Air sprung suspension is customisable to weight and is adaptable as your child grows. The powerful disc brakes are strong enough to stop your child safely from warp speed. The bike's frame and geometry have been optimised for manoeuvrability yet also stability. 

Here at Bikes Online, we believe that when you spend this much on a bike for your child, you want it to last for a long time. Not only is the air suspension tuneable as your child grows, but we also use reach-adjustable brake levers, and the bike can fit 26-inch wheels in the future.

Because these bikes have been optimised for off-road riding, they can be a chore to ride on the road. If your child is excelling at riding off-road, the D24 series will be there every step of the way. These bikes are not ideal for street riding or getting to and from school. Hardtail mountain bikes are much more versatile than a dual suspension bikes and will suit children doing a bit of everything.



BMX and Dirt Jump bikes are specially designed to jump, spin and be as agile as possible. They have low frames and seat posts which are not ideal for longer rides because riders have to stand when pedalling. However, if your child wants to hit the pump track, ride the local dirt jumps or skate park, these bikes are for them. 

While most BMX bikes come with 20-inch wheels, they are also available in 16 and 18-inch wheels to suit riders of shorter heights. Frame sizes are measured in inches. The bigger the frame, the taller a rider can be. Our BMX range is ideal for children looking to get their first experience riding this style of bike. 

The Polygon Rudge is the ideal Freestyle bike for BMX and DirtJump use. Built around a Hi-TEN steel frame and fork for added strength and durability, this bike is capable of handling aggressive moves and big landings. We also spec a “Giro” so the bars can spin an infinite amount without any chance of damaging the cables.  

Dirt Jumpers are essentially big BMX bikes. Although they have front suspension it is often run really stiff to avoid compression on jumps. They use 26 inch wheels for increased stability compared to a BMX but they are more agile compared to a standard MTB.

Dirt jumpers are only available at single speed. This means when the hills get steep there is no way to change gears and make pedalling easier. The low frame and short seat post means riders can't sit down and pedal as easily.

If your child wants to get tonnes of air time at the trails or skate park, these bikes are for them. If your child has a short easy commute these bikes are an amazing way to make their commute more exciting. If they want to ride further or explore the trails more than A mountain bike would be better suited for them. If they want a light, easy bike to ride, try a city bike.




Choosing a bike for your child is an exciting time. There are so many styles to choose from, and it can be hard deciding which one will be the best fit. It’s important not to buy them something they don't want or even worse - what you think they might like. The only way to know what's best is by asking them questions about their biking interests and making sure that there are no compromises between quality of the bike and price range (of course). Check out our range of kids bikes now at Bikes Online.

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