BMX bikes are dedicated to performing street adventure performances. Currently, the BMX series of bicycles are becoming more and more popular in the world, especially among teenagers. However, for newcomers, choosing an ideal BMX bike size may be a bit difficult. The following article will give you tips for choosing a suitable BMX bike size and provide a buying guide with the BMX bike size chart.
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Current Types of BMX Bike
One thing that not everyone knows is that the BMX series of bicycles is divided into three categories and each type is used for different purposes.
Traditional BMX bicycles have been around since the late 1960s to serve mainly for short off-road races and obstacle-skating performances or cycling. The traditional BMX bikes have tires measuring 20 – 24 inches, made up of high ridges that closely resemble mountain bikes.
The Freestyle BMX
The Freestyle BMX bike was born after the traditional BMX, used primarily for performance rather than racing. The advantage of the Freestyle BMX performance bike is its good grip on the road. So it is often used for performing performances on difficult terrain on stairs, ramparts or sliding over valley terrain, or overcoming obstacles.
The frame features strong and large-sized connecting brackets to meet performance needs. Freestyle performance BMX wheels are mainly 20 inches in size with sturdy nylon cladding and bezels but less floating than other BMX series.
BMX bicycles just for jumping
BMX bicycles just for jumping are the latest series of BMX bikes and a mix of two previous models. The purpose of this BMX series is to jump from one point to another. This BMX bike is characterized by an extremely sturdy frame, but its weight is not as large as the Freestyle MBX and lighter than the traditional BMX. This model does not use the front wheel brake, but only on the rear wheel.
The Importance of Bike Size
Knowing the right bike type is essential, but choosing the right size is something that few people think about. Each BMX bike is created to accommodate a variety of sizes, weight, ages, and especially the rider’s height.
As well as clothes, BMX bikes are designed to suit each type of person. So make sure you buy the right size bike for your body, ensuring the most comfortable and efficient operation of the vehicle. If the vehicle selection is not suitable for the human body, it not only causes discomfort for the user but also has a potential risk of causing a very high accident during the vehicle’s operation.
Owning the right size BMX will standardize the way the bike runs. Your feeling when doing tricks or cruising will be more authentic and accurate. A smaller bike will cause a sense of unbalance and stability when riding. In contrast, for riders of small stature, large bikes will make them feel a lot more difficult to lift or even ride.
6 Steps To Find The BMX Bike Size for Height
To avoid feeling unsteady or difficult to control while cycling, make sure your bike frame, saddle, and handlebar are perfectly fit for your body size. Here are 6 helpful steps to guide you finding a BMX bike size for your height.
Step 1: Measure body height and leg length
To choose a bicycle with a reasonable frame, you need to measure body height (Height) and foot length (Inseam), from the crotch to the ground. The fastest way to estimate is to be upright, feet flat on the ground, the chassis in the middle.
Step 2: Measure the frame
As noted above, the frame size should match the stature. If you choose a bike with a frame that is too large, it will be uncomfortable to ride. You may not be able to fully support your foot to step on or pedal. Conversely, if the vehicle has a small frame, you will not be able to give full stride to maximize pedal force.
After measuring, you will use the bicycle frame standard size correlation table below to choose the right bike for you.
|Height (cm)||Top Tube Size (in/cm)|
|124||15.0 -15.5/ 38.1 -39.37|
|130||15.5 -16.0/ 39.37 – 40.64|
|135||16.0 -16.5/ 40.64 -41.91|
|140||17.0 -17.5/ 43.18 -44.45|
|145||17.5- 18/ 44.45- 45.72|
|150||18.0 -18.5/ 45.72 -46.99|
|157||19.0 -19.5/ 48.26 -49.53|
|160||19.5 -20.0/ 49.53 -50.8|
|165||20.0 -20.5/ 50.8 -52.07|
|170||20.5 -21.0/ 52.07 -53.34|
For BMX children’s bicycles, the best way to find the exact right size is to have your child sit in a seat. If your child can fully put their feet on the ground and their hands fully comfortable with the handlebars, then it is the right bike. Besides, when the child tiptoes, the distance between the crotch and the saddle is about 25-50cm.
Step 3: See the saddle position
Some people like the saddle tilted slightly forward or back, but most prefer a straight saddle because they don’t like the feeling of slipping forward or after cycling. Usually, it will take some time and a few tries to figure out which saddle is right for you. Basically, the saddle should be positioned so that your feet can rest comfortably on the pedals. When you pedal, your feet can be completely straight down, and your buttocks are kept fixed, not pinched to the sides.
Step 4: View the handlebar position
The position of the handlebar is very important, but many people do not pay attention, especially newcomers playing the bike. The wrong handlebar position can lead to back pain, shoulder pain, and wrist pain when kicking. In addition, the handlebar is designed to suit the size of the frame, so there will be many different sizes.
If you want to straighten your back and be able to see your surroundings and not crawl into the bike, keep the handlebars higher. The slightly straight sitting posture will reduce the aerodynamic factor and slow the vehicle speed, but the posture will be much more comfortable. However, no matter how you adjust, you should not over-adjust. Otherwise, you may damage the layout or worse, damage the handlebars.
Step 5: Select the pedal
To ensure that your feet can move smoothly with the pedal, consider choosing a pedal without a clamp or a foot clamp pedal. Normally, with the clamp pedal, you can rest assured to put the pedal power without worrying about slipping off the pedal. The only downside to this pedal is that it is usually fussier than the regular pedal.
Step 6: Measure the size of the bike
The wheel size is the diameter from the axle to the tire. We can refer to the following table for a comparison of the recommended wheel sizes with the riders’ height and age.
12 inches BMX bike size
When you prepare to instruct your child to ride a bicycle, BMX might be the best decision you can think of. Many people think that buying an oversized bicycle for children so that they can still use it when they grow up.
You should not do this because it will make it harder for children to practice and lose confidence, making them less willing to practice cycling. So, choose a bike with a more suitable size so that children can easily control and maintain balance, less danger, and will be a lot more fun when learning to ride.
12 inches is the most suitable BMX bike size for children from 4 to 7 years old. Make sure your child can stand firmly with both feet on the ground while sitting in the saddle for the most comfortable and flexible feeling. BMX bicycle frames for children often use high-quality high-strength steel alloys that are extremely durable and sturdy. This helps parents to be assured and ensure the safety of the child.
14 inches BMX bike size
Children between the ages of 7 and 10 are active, inquisitive, and need a lot of physical activity. So if you are considering buying a BMX for your child, the 14 inch BMX bike size is ideal for 10 years olds that are between 90 and 130 cm in height. These bicycles have larger and stiffer frames than the 12-inch type suitable for children of this age that begin to learn basic tricks and are more confident to run on longer and more rugged tracks.
16 inches BMX bike size
The 16-inch bicycle is the ideal BMX bike size designed for riders who are between 100 and 140 cm in height who are about 13 years old. This size will give the rider a feeling of fit and easier to control. Bicycles size 16 inches are usually made of Chromoly frame, which feels sturdier than the previous two sizes. This allows children of this age to be more confident in demonstrating daring techniques or moving on more difficult surfaces.
18 inches BMX bike size
The 18 inches BMX has inherited all standards of the BMX bike size 20. This is a great size for teen riders who are just starting to get used to the size of 20, but have a height limit.18 inch BMX bicycle is suitable for teenagers with a height from 130 to 160 cm. Most of the 18-inch models have a very durable structure, lightweight to help young people display skillful lift on many different terrains.
20 inches BMX bike size
BMX bike size 20 is the original and most popular size of the BMX series. This is the exact size suitable for cyclists over 160 cm in height and adults. BMX bike size 20 inches often use steel or alloy needles to ensure rigidity in performance. Wheels are made from tarmac rubber for better off-road adhesion.
The 20-inch BMX is the most popular because it is suitable for large area parks, with many terrains such as stairs, ramps, and chairs to help BMX players have space to perform. This is the size for the performance, so some riders will choose a frame slightly longer or shorter than the standard depending on their preferences and playing style.
For some over 180cm in height, riding BMX sizes above will be uncomfortable as you will have to stoop while driving. A 22 inch BMX bike is the size that will satisfy your expectations. 22 inches is the longest current size for the BMX series.
However, a longer bike will require more reach and will be more powerful than usual. Some racing companies think that this will cause them a bit of hindrance when performing some tricks so you should consider carefully before buying.
Some Other Note When Buying BMX
The price corresponds to the quality
After finding for yourself a BMX bike of the right size, quality is also a concern. One first thing to find out is the bike’s retail price or even the manufacturer. That’s the build quality for a bike that needs to be taken into account. Some bikes are sold for a fair price, one that’s sure to make you feel happier and more comfortable riding them. At the same time can extend the usage time, save maintenance costs.
Small parts can have a big impact
Consider the components on your bike. Even if the frame is made of high-grade chromium or steel material, smaller parts can influence or disrupt your BMX experience. Sometimes bike shops will have a way of combining accessories with top-quality private parts to bring the best out of your bike. This will give the bike a better core.
However, these branded parts generally perform better over time than others. While you do a quality check of the parts, check their dimensions. For example, a larger sprocket means that the design of the bike is a little bigger due to you. The smaller the parts are, the lower the quantity is.
Don’t get hooked on advertising
One of the good rules for you as if you can buy any bike is to make sure you don’t get caught up in flashy labels or advertisements. Bicycle shops tend to promote their bikes but this seems to be too normal for bicycles that aren’t as great as advertised. Get rid of them from your mindset first and consider the basic ingredients.
Regular after-sales support
When it comes to a BMX bike purchased from reputable manufacturers, of course, you will pay a little more for your bike. However, you get the advantages of premium customer support once you have purchased the bike.
Consistent quality is one thing you should pay close attention to when choosing. Cheaper-looking BMX bikes can also overreact when you need them to show you some resilience. This can be detrimental to your riding experiences.
If you are using your bike for a normal ride on the road or you do not use it very often then this will not affect you too much. However, if you are the person looking to be able to speed up your game, you will likely notice a big obstacle or a problem happening when you perform more difficult moves.
Sometimes people may argue that carbon frames are the best choice compared to aluminum frames. Everyone needs to know that nothing can be more suitable for titanium or Chromoly frames but for cheaper BMXs carbon frames don’t seem to be uncommon. The problem is that very brittle carbon or high carbon steel tends to fracture the frame easily.
Don’t be afraid to buy better quality frames for even a little extra money. Security is still more important than the money in your wallet.
In short, BMX bikes come in many different shapes and sizes suitable for many different ages. Choosing the right one for you will make a difference in epic workouts and give you safety and comfort while experiencing them. I hope my post can give you a better look in choosing for yourself a BMX that’s right for your size.
What factors are used to measure the BMX bike size?
Two main factors used to measure vehicle size are your height and the size of the bike frame (Top Tube). Your height is measured from the top of your head to the ground. The frame is measured from the center of the upright to the center of the steering wheel.
Are BMX bikes suitable for all ages?
BMX bikes are suitable for all ages. However, you need to choose the right bike size for your age and height (or others) to get the best experience.
What age is a 20 inch BMX bike for?
Children and adults of all sizes can ride a 20-inch BMX bike. However, those around 160 cm in height are best suited for this size. Minimum age for this size is 7 years old.
Why are BMX bikes so small?
The size of a BMX bike due to the nature of the bike is to perform lift and difficult movements on different surfaces. Small bike sizes will be more convenient for big jumps. Despite its small size, the chassis is designed to withstand well and is strong enough to withstand high impact forces.