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MTB-Weeks – Mountain Bikes and Accessories for Children

Whether the kids want to emulate their mother on an MTB, hit the trails with friends or get a full-suspension mountain bike for Christmas: Today, there is almost as wide a range of MTBs and accessories for kids & teens as there is for adults. The enthusiasm for off-road riding can only be maintained if the weight, geometry, size and components are precisely matched to the child. Of course, the bikes should also look stylish and match the rest of the MTB outfit. Everything you need to know about mountain biking for kids can be found here! » Read more

Kids Mountain Bikes
MTB Apparel & Shoes
MTB Components
MTB Helmets
MTB Tires
MTB Suspension Forks

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Table of Contents - Kids Mountain Bikes, Apparel, Shoes, Helmets, Parts and Accessories

MTB-Weeks – Mountain Bikes and Accessories for Children

MTBs for Kids and Teens for All Adventures

The first attempts at standing up and riding usually take place either with starter bikes (with or without training wheels) or a balance bike. The latter in particular are becoming increasingly popular with parents, as they give the child an immediate feel for speed and bike control without having to pay direct attention to pedals and brakes. But initial experience pedalling with training wheels can also pay off later and make it easier to switch to a full-fledged children's mountain bike. A single-speed gearbox, chain guard and the choice between V-brake and coaster brake ensure a carefree and safe riding experience.  

At primary school age, depending on the current size, children's MTBs are already available with several gears and some also have suspension forks. Teenagers then get the full range of mountain bikes: hardtails, fullys, downhill mountain bikes, all-mountain, dirt or fat bikes. The components there are also already of a similar quality to those for adults and offer everything the off-road heart desires.  

You can find help in deciding on the right wheel size in the following section, but an overview of the bicycle types, approximate body sizes and age groups mentioned can be found in summary here:  

Bike Type Approx. Age  Approx. Height  Wheel Size 
Balance Bike  2 – 3 Years  90 – 110 cm   12 – 14 Inch 
Starter Bike  3 – 5 Years  95 – 120 cm   14 – 15 Inch 
Kids MTB  5 – 10 Years  115 – 150 cm   20 – 24 Inch 
Junior MTB  Over 10 Years  Over 145 cm   26 – 27,5 Inch 
Kid's MTB Info Graphic

The Central Component for More Riding Fun: The Weight

Even though mountain bikes for children will always remain somewhat heavier than the "big" MTBs as a percentage of their own body weight, the weight is of enormous importance for fun on the bike precisely for this reason. Not only does less flywheel mass make progress uphill much easier, it also has a significant influence on the control of the bike. If the youngsters come home tired and frustrated even faster because the heavy bike moves so badly or can't keep up with their friends, then the joy is quickly gone. "Rigid" mountain bikes without suspension are lighter than those with suspension forks or even fullys with full suspension. The lightest models today weigh a reasonable 8-11 kg, so your child can ride happy.  

MTB-Weeks – Mountain Bikes and Accessories for Children

Mountain Bikes for Kids – The Right Wheel Size

The most important thing when choosing a bike is not to think that you are buying a bike that the kids will grow into. All children should feel comfortable quickly and this can only be achieved with the right size of the wheel and frame, with the height of the top tube being crucial in order to maintain control when riding and dismounting. 💡 A tip: If the little ones also feel safe with larger wheels and do not sit too high above the ground, then they are a great help, especially on long tours in rough terrain, as they can easily roll over roots and stones and thus guarantee more security and stability.  

In the following detailed overview you can estimate which wheel size roughly corresponds to which body size and which inner leg length. The best way to measure the inside leg length is to hold a book between your legs as if you were sitting on it and then press it against the wall, mark it with a pencil and measure it.  

Wheel Size  Approx. Height  Approx. Inside Leg Length  Approx. Age 
14 Inch  95 – 110 cm   38 – 46 cm   3 – 5 Years 
16 Inch  105 – 120 cm  44 – 48 cm   4 – 6 Years 
20 – 24 Inch  115 – 130 cm   48 – 56 cm   5 – 8 Years 
24 – 26 Inch  133 – 155 cm   56 – 64 cm  8 – 11 Years 
26 – 27,5 Inch  145 – 160 cm   61 – 71 cm   Over 10 Years 
27,5 – 29 Inch  Over 150 cm  Over 65 cm  Over 14 Years 


Your child should be able to stand above the top tube and place both feet on the ground with the bar. If you are worried that the bike will quickly become too small, make sure that you still have adjustment options for the seat post and stem or that the components are interchangeable. You should also make sure that your darlings don't sit too stretched out on the bike, as they could otherwise feel too much pressure on their hands and back.  

Rigid Forks, Suspension Forks and Shocks – Easier and Heavier with Suspension

Mountain bikes with suspension forks and shocks certainly look tempting at first glance. But especially for beginners and if you don't want to race down the most daring trails, an MTB without suspension fork is the most fun, because  

  1. a bike with a rigid fork is usually noticeably lighter than one with suspension, making it easier for the kids to get up the hill 
  2. the kids are often too light to feel much of the suspension anyway 
  3. the unsuspended mountain bike trains the riding technique (correct weight shifting & choice of lane)  
  4. vibrations can also be absorbed by wide tires with less air pressure and thus offer even more grip at the same time. 

If the boys and girls already have experience with an MTB or BMX and feel safe on all trails and are keen to shred, then a mountain bike with a suspension fork is certainly a sensible investment. To be able to race over roots and stones and land your first jumps. You should keep in mind that: 

  1. a better suspension fork is usually lighter and offers better adjustment possibilities for spring preload (air chamber) and rebound, which is especially important for children & young people with low body weight 
  2. a suspension fork makes braking more effective, as it gives your bike more grip 
  3. children can benefit from a suspension fork on long rides because they are less concerned with bumps and keeping control. 

A Fully (full suspension MTB) is the right bike for kids and teenagers if they are constantly throwing themselves into downhills anyway, flying over drops or absolutely want to go to the bike park. Of course, there are a few things you should bear in mind here too:  

  1. Fullys are usually much heavier due to the suspension fork and shock  
  2. it is best to invest in high-quality, lightweight and individually adjustable shock absorbers 
  3. air suspension is the easiest way to adjust to new loads 
  4. suspension fork and shock should be matched to each other and should have a lockout function (prevents bouncing, which is crucial especially on climbs to avoid wasting too much energy).  
MTB-Weeks – Mountain Bikes and Accessories for Children

Braking with Children's Hands on the MTB

It should come as no surprise that brakes are one of the most important components on an MTB. Even the smallest ones should learn to get a feeling for braking distance and braking behaviour. When your offspring has left the coaster brake behind, it is first of all an adjustment to suddenly brake only with the hands. It is therefore crucial that the brake levers are adapted to children's hands. Even the handlebars should have the right diameter so that they have a firm grip on them and can ideally activate the brake levers with just a few fingers. The brake levers should:  

  1. be ergonomically easy for children to grasp and reach without the risk of slipping off 
  2. be activated by relatively light pressure without having to pull the brake lever to the handlebars. 

Even with mountain bikes for children, the question between rim brakes and disc brakes is more than relevant. For the first trips into the forest, V-brakes are certainly a good option, as they are light and easy to maintain. However, as soon as the terrain becomes more complicated or the tricks more daring, you can hardly avoid hydraulic disc brakes. They offer optimal braking power without requiring much hand pressure.  

Shifting Made Easy – 1-Speed on a Mountain Bike

On entry-level bikes you will often find rotary shifters that can be operated with the whole hand on the handlebars and thus require less attention than gear levers. However, the latter are somewhat easier to operate on demanding trails and are therefore always standard on MTBs for young people. It is not only with adults that the advantages of a 1-speed drivetrain have meanwhile become established here. Easier shifting options, less weight and less maintenance and care can hardly be denied.  

Dropperposts Are the Better Seatposts for Children Too

Dropperposts (also called Vario seatposts) are lowerable seatposts that allow you to raise and lower the saddle at the touch of a button on the handlebars. This gives you: 

  1. a good seating position on straight stretches and climbs to be able to put a lot of power on the pedals 
  2. enough space on downhills to shift the body and keep the optimal balance 
  3. fewer problems getting on and off the bike.  

Many fullys and also hardtails are equipped with dropper posts and can be retrofitted if necessary. The only small disadvantage, as with many technical components: they are usually somewhat heavier than normal seatposts.  

MTB-Weeks – Mountain Bikes and Accessories for Children

Suitable Cranks and Pedals Ensure Smooth Rotation

Children not only have shorter legs, but also narrower hips. That's why children's MTBs should have cranks that are adapted to their anatomy. If the crank is too short or too long, it becomes much more difficult to transmit power properly. One rule says that the crank length should be about 10 % of the body height. And the distance between the left and right crank (Q-factor) should also be adapted to the hips of boys and girls. Constantly pedalling with your legs in the wrong position quickly leads to unnecessary knee pain.  

Especially when mountain biking on challenging trails, a lot of ground clearance is a factor to consider so that you don't touch the ground with your pedals. You can achieve this with a high bottom bracket, suitable crank lengths and the right pedals on which the little ones have a firm footing without the pedals protruding too much.  

MTB Helmets for Kids: Shell or Full-Face?

Of course, there is also a wide range of helmets for children and teenagers. After all, safety is usually even more important for youngsters. From the first shell helmets for boys and girls of nursery and primary school age to lightweight and stylish helmets with Mips safety systems to professional full-face MTB helmets with visor and chin guard: the right fit always counts.  

Kids Mountain Bike Clothing and Protectors for Style and Protection

The right fit is also the top priority for mountain bike clothing. This is closely followed by the appearance and coherence of the outfit. MTB trousers and shirts are usually cut a little wider so that protectors can potentially fit underneath. Especially if you regularly throw yourself into downhills or love jumps, it makes sense to look into protectors. Elbow and knee guards, protector jackets, crash trousers or protector shorts or shin pads: Kids have the full range of protective shields. So that they can plunge into adventure without a care in the world.  

Shoes and Goggles for Mountain Bikers Big and Small

Young mountain bikers already have the choice between fresh MTB shoes with a lot of grip on the pedals or performance-oriented MTB shoes for clipless pedals. Cycling glasses can be almost as important for safety on the bike. There are a lot of insects outside, especially in forests and meadows, and if they fly into your eyes at full speed in the middle of the descent, you can quickly lose concentration or control.  

At BIKE24 you will find the right MTB for every enthusiastic child and the right clothing, components, protectors, helmets and all accessories for lots of trail fun. And if you have any questions, our customer service is always happy to help. 

MTB-Weeks – Mountain Bikes and Accessories for Children