Determine the size of the bike frame by height

Wheel size

This parameter is important not only for children, but also for adults. As the table clearly showed, wheels up to 24 inches in diameter are considered children. Anything more. belongs to the category of adults. Although for people of short stature, teenage wheels from 20 to 24 inches will be quite comfortable.

It’s still more a matter of taste. the size of the wheels of the bicycles. The table is therefore not needed. Here everyone is guided by their own feelings.

On road models, the number 28 is most often found, but on mountain models. 26. This is due to the specifics of riding. You can ride on the asphalt with a breeze, which makes it possible to make wheels of large diameter, and on difficult mountain trails you will need agility and maneuverability.

How to choose the right mountain bike and hybrid bike for your height?

A popular frame parameter is the length of the top tube, but the size of the frame is usually determined by the length of the seat tube. It is important to understand that the geometry of the frame is arbitrary and frames with the same length may have different sizes. To determine the desired frame length, rest your elbow on the “nose” of the saddle and place your hand on the stem. Place your fingers on the stem cover.

The size of the frame depends on the height of the person, small people need smaller frames. Frame size is measured in two ways:

  • С-С, from the axis of the carriage (pedals) to the axial mowing line of the upper pipe;
  • С-Т, from the axis of the carriage to the upper cut of the seat tube.

Traditionally, road bike frames are measured in centimeters or millimeters, while hybrid and mountain bikes are measured in inches.

Test fitting

determine, size, bike, frame, height

To make sure the frame isn’t too big, you need to place the bike between your legs. The shoes should be the way the buyer is going to ride, the knees are straight, the back touches the saddle. There should be a distance between the crotch and the frame, approximately equal to the width of the palm. For road racing a little less: 5-10 cm, for mountain and BMX more: 10-20 cm.

Riding a bike with a frame touching the groin is traumatic. When jumping, there is a high probability of hitting the upper pipe.

Without theory. nowhere

Almost all bike frames come in a wide variety of sizes. And each manufacturer classifies them differently. Almost every. Each bicycle model has at least 3-4 sizes and, accordingly, different markings. Frames are marked by height in letter and digital form. The defining parameter for any bike frame is the height of the seat tube. It is measured from the center of the carriage to the end of the tube and can be specified in either inches or centimeters.

The length of the seat tube, of course, is not the only indicator that characterizes the size of the bike, but the main one. The geometry of the frame is also determined by the angles of inclination of the pipes at the joints, the length of these pipes and their relative position. Therefore, it is unambiguous to say that such and such a number is suitable for a specific person, but such and such is not suitable, it is impossible to say.

Choosing a BMX Bike Size

Stunt bikes are measured differently from everyone else. They have a size called the length of the upper tube of the frame. It is measured by the English standard of length. inches. For some, a long frame is more convenient, others like a short one. There are no generally accepted rules and strict proportions in this case, it all depends on personal preference. Therefore, the relationship between bike frame size and height is quite different here. The table reflects this dependence.

Frame marking by size

There is a tradition all over the world to mark all bicycle frames with letters, numbers and their combinations. Consider the main types of frame markings from different manufacturers.

There are a total of 6 frame sizes for seat tube height:

  • XS is the smallest bike size for the smallest riders;
  • S. small;
  • M. medium frame variant, the most common one;
  • L. slightly above average;
  • XL. large;
  • XXL. well, very large.

And this is where the confusion begins, because each size corresponds to two options in numerical terms. This equivalent is conditional and serves to roughly determine the correspondence of your physical data with the data of a particular frame. And here is this table:

If anyone is interested, then the data in this table is calculated using the formula for selecting an adult bike. According to your parameters, where “d” is the length of your legs, and “D” is the size of the frame. Now we will try to determine by the formula: D = d0.56 / 2.54. The formula uses two coefficients. 0.56 is the ratio of leg length to height, and 2.54 is the conversion of inches to centimeters. Such arithmetic.

Since all people are different in size and the same ratio of legs and height cannot be found, this number is also very approximate.

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But there are times when your data correspond to the overall dimensions of two frames at once. Do not buy the same two is great at once. What to do in this case? Think.

  • If I am planning an active cycling lifestyle, then I will choose a smaller bike size, because the smaller bike is easier to handle and therefore weighs less.
  • If I am full, then it will be difficult for me to climb a high frame.
  • If I am thin and skinny, then I need to choose a frame that is slightly larger in order to seem more weighty and so as not to be blown away by the wind. Quite serious.
  • If I have already bought a bike and it doesn’t suit me in size, although the tables agree, then I probably forgot about the saddle and handlebar adjustments, which in most cases have a very wide range. In addition, I always have the opportunity to change the stem or seat tube.
  • If I have hands down to my knees, then I will take a bigger bike. In which case, you can always reduce the adjustment.

You can also find markings for both a child’s bicycle and a women’s bicycle. Let’s pay some attention to them.

Rostovka

The size of the bike frame is understood as the size. The table usually reflects this parameter in inches. Although there are letter and centimeter designations. What do you need to correctly determine the height of the frame? The most important thing is to know your height. Only exactly, and not with a spread of 10 cm.Otherwise, the table of sizes of bicycles for growth will help to orientate.

Bike frame

The bike frame in the model range is made in several sizes: mountain bikes in 3. 5 standard sizes, road 2 or 3 options, and folding bikes in one universal size.

The frame of a children’s bicycle is sized for a specific wheel diameter: it is easier to determine how to choose a children’s bicycle by the size of the wheel (table of sizes of children’s bicycles)

How to Measure a Bicycle Frame Size

Choosing a bike frame is about sizing. Size is the most important for those who ride a lot, but should not be forgotten by other cyclists, because the most valuable thing depends on the configuration and size of the frame. human health.

Universal rule

The general rule of thumb is to test any bike before moving on to testing different types of fit. The same rule will help you quickly choose the size of the frame.

So, you should stand over the bike frame so that the saddle rests on your back, and relax. At this point, the distance between the top tube of the frame and the crotch should be between 5 and 15 centimeters.

Too much distance will reduce the stability of the bike on the track and most likely corresponds to a too short base, and too little will create inconvenience and a greater likelihood of injury.

How to choose a bicycle wheel size (diameter) for height?

The table shows popular bike wheel sizes and heights for adults and kids bikes. Large bicycles in one wheel size are available in several sizes. The table shows the average value, you can choose the diameter of the wheel individually according to your height.

When driving in the city, it is better to choose a bike with an average wheel size of 24 or 26 inches. When driving on highways, asphalt roads and rough terrain, you should choose wheels 26, 28, 29 inches. Large bicycle wheels reduce energy consumption at high speeds and transmit less vibration to the handlebars and saddle. Recommendation: For a height of about 150 cm or less, limit the choice of a bicycle with wheels of 24 “for city riding and 26” for riding on asphalt and unpaved roads. Bicycles with a wheel size of 20 inches are easy to store and transport, but less convenient to ride. With a large frame size (16 inches and above. adult models), these models with small wheels are less stable on uneven roads when driving. The position of the center of mass and the distribution of the rider’s weight depends on the size of the bicycle wheels and the frame design. During the ride, there is a constant transfer of the cyclist’s weight between the handlebars, saddle and pedals. On bicycles with contact pedals (hooks or tour clips), the leg force is applied to both pedals at the same time. To reduce fatigue and stress on the knee joint, select a smaller frame size or a specially designed frame. On a bike with a regular frame, it may be necessary to change the height, shape and stem. The height and width of the bicycle seat is selected individually.

Another calculation formula for men

Using a tape measure and all the same board or book, measure the distance from the floor to the crotch, and not to the top of the head. Multiply the resulting value by 0.57. for mountain bikes (including full suspension). For track bikes, a factor of 0.63 is used. When choosing a road model, the multiplier is 0.66. A touring bike has a multiplier for the frame size of 0.61, if a shock absorber seatpost is used, an additional 5 cm is subtracted from this value.To convert the result to inches, divide the result by 2.54.

Without theory. nowhere

Almost all bike frames come in a wide variety of sizes. And each manufacturer classifies them differently. Almost every. Each bicycle model has at least 3-4 sizes and, accordingly, different markings. Frames are marked by height in letter and digital form. The defining parameter for any bike frame is the height of the seat tube. It is measured from the center of the carriage to the end of the tube and can be specified in either inches or centimeters.

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How to Choose The Correct Bike Size

The length of the seat tube, of course, is not the only indicator that characterizes the size of the bike, but the main one. The geometry of the frame is also determined by the angles of inclination of the pipes at the joints, the length of these pipes and their relative position. Therefore, it is unambiguous to say that such and such a number is suitable for a specific person, but such and such is not suitable, it is impossible to say.

Sizes of children’s bicycles

The manufacturer, when producing a children’s bike, knows that the baby is growing very quickly. And so he makes some size adjustments and tries to make the frame in such a way that the adjustment range is as wide as possible. However, the dimensions of the frame should not be taken into account as much as the diameter of the bicycle wheels. The controllability is high and the maximum speed depends on this parameter. You should not measure your baby with a caliper, you still do not know how he will grow in six months or even a couple of months, so a child’s bike should be chosen with some margin.

Here is a sample size chart for children’s bicycles.

Child’s height (cm) Child’s age Tire diameter (inches)
75. 95 13 Up to 12
95. 101 3. 4 12
101. 115 4. 6 sixteen
115. 128 6. 9 twenty
126. 155 9. 13 24

Road bike dimensions

The characteristics of road bikes are conducive to long trips on asphalt. Often very distant. Therefore, it will take a long time to travel, which requires very careful selection of the dimensions of both the frame and the wheels, etc. In the table below we give the recommended dimensions for road bikes.

Human height (cm) Category Frame height (cm) Tube length (upper / seatpost) (cm)
157. 163 XS 49. 51 52/42
163. 170 S 51. 54 53.5 / 44
170. 178 M 55. 57 55.5 / 50
178. 183 M / L 57. 59 57 / 53.5
183. 190 L 58. 60 58.5 / 55.5
190. 198 XL 61. 63 61 / 58.5

Frame marking by size

There is a tradition all over the world to mark all bicycle frames with letters, numbers and their combinations. Consider the main types of frame markings from different manufacturers.

There are a total of 6 frame sizes for seat tube height:

  • XS is the smallest bike size for the smallest riders;
  • S. small;
  • M. medium frame variant, the most common one;
  • L. slightly above average;
  • XL. large;
  • XXL. well, very large.

And this is where the confusion begins, because each size corresponds to two options in numerical terms. This equivalent is conditional and serves to roughly determine the correspondence of your physical data with the data of a particular frame. And here is this table:

If anyone is interested, then the data in this table is calculated using the formula for selecting an adult bike. According to your parameters, where “d” is the length of your legs, and “D”. frame size. Now we will try to determine by the formula: D = d0.56 / 2.54. The formula uses two coefficients. 0.56 is the ratio of leg length to height, and 2.54 is the conversion of inches to centimeters. Such arithmetic.

Since all people are different in size and the same ratio of legs and height cannot be found, this number is also very approximate.

How To Choose The Correct Size Of Road Bike Frame

But there are times when your data correspond to the overall dimensions of two frames at once. Do not buy the same two is great at once. What to do in this case? Think.

  • If I am planning an active cycling lifestyle, then I will choose a smaller bike size, because the smaller bike is easier to handle and therefore weighs less.
  • If I am full, then it will be difficult for me to climb a high frame.
  • If I am thin and skinny, then I need to choose a frame that is slightly larger in order to seem more weighty and so as not to be blown away by the wind. Quite serious.
  • If I have already bought a bike and it doesn’t suit me in size, although the tables agree, then I probably forgot about the saddle and handlebar adjustments, which in most cases have a very wide range. In addition, I always have the opportunity to change the stem or seat tube.
  • If I have hands down to my knees, then I will take a bigger bike. In which case, you can always reduce the adjustment.

You can also find markings for both a child’s bicycle and a women’s bicycle. Let’s pay some attention to them.

How to choose the right bike size for an adult or child?

Everything seems to be good. both the color is suitable, and the mechanics are working perfectly, but you get tired quickly, and skating turns into torture in an hour or two. All clear. The bike is incorrectly sized. To avoid such disappointments, you need to know what sizes of velor are, and how they fit your height.

Choosing a bike by weight

In this case, unfortunately, we cannot bring the data into a table, otherwise it would be huge. We can give a recommendation. If your weight does not exceed 100 kg, ride any bike of adequate quality that is suitable for the size and forget about weight restrictions. If your weight exceeds 100 kg, then you need to pick up a bike with reinforced wheels and a good, expensive carriage, on good expensive bearings.

These are all the recommendations that we can give you on the size of your future bike. The main thing to remember is that there is no bad growth, the main thing is to choose a bike that suits you. Have a good choice!

Correct body position

How do you know if a bike is right for you? It happens that the size of the bicycle frame fully corresponds to the parameters of a particular person, that is, everything seems to fit, but the cyclist does not feel comfortable. And it happens that the fit is comfortable, but over time, the hands, knees and back begin to hurt from cycling. What’s the matter?

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It turns out that the bike seemed to be selected correctly, but the correct fit of the pilot was not taken into account. What should it be? We analyze in detail:

  • The foot on the pedal at the lowest point should be slightly bent at the knee (the cyclist should not reach the pedal).
  • Hips do not spread apart during pedaling.
  • The rider’s back on the bike should be straight with a slight forward bend. Shoulders spread.
  • There should be a short distance from the top tube to the crotch of the cyclist while standing on the ground.

Choosing a suitable bike model, you need to sit on it, try to ride a few meters, check all the parameters and only then make a choice. The distance from the saddle to the handlebars should be taken into account. the cyclist should not reach too much for the control. The rider’s landing should be free and comfortable.

Folding bicycles

These models are not designed for all cyclists. Riders of average size can ride them comfortably, so to speak. This is a person of average build, height from 155 to 185 cm.The fact is that the frames of folding models are produced only in one size.

Mountain and city bikes

You can navigate by this table:

Frame size (inches) Height (cm) Frame size (cm) Frame size (cu)
13″ 130-145 33 XS
fourteen” 135-155 35.6 XS
fifteen” 145-160 38.1 S
sixteen” 150-165 40.6 S
17 “ 156-170 43.2 M
eighteen” 167-178 45.7 M
nineteen” 172-180 48.3 L
twenty” 178-185 50.8 L
21 “ 180-190 53.3 XL
22 “ 185-195 55.9 XL
23 “ 190-200 58.4 XXL
24 “ 195-210 61 XXL

The exception is folding models, since they are produced in one size and are designed for a cyclist of an average size with a height of 1.55-1.85 m.

By height

This method cannot be considered 100% accurate, since in this case the general proportions of the body, as well as the length of the arms and legs, are not taken into account. But to understand your size, this method of determining the appropriate size is quite suitable.

So, you need to measure your own height without shoes. After that, using the table “Bicycle size”, you can choose a suitable option. In the recommended classification, frame parameters are indicated in inches, centimeters or in conventional units.

Frames for large bikes are built from stronger, thicker tubes to support the rider’s significant weight. Smaller bikes tend to weigh 150-200 grams less than the adjacent larger bikes.

Size classification according to the cyclist’s height:

Height (cm) Frame size (inches) Frame size (cm) Frame size (cu)
130-145 13″ 33 XS
135-155 fourteen” 35.6 XS
145-160 fifteen” 38.1 S
150-165 sixteen” 40.6 S
156-170 17 “ 43.2 M
167-178 eighteen” 45.7 M
172-180 nineteen” 48.3 L
178-185 twenty” 50.8 L
180-190 21 “ 53.3 XL
185-195 22 “ 55.9 XL
190-200 23 “ 58.4 XXL
195-210 24 “ 61 XXL

Children’s bicycles

Choosing a two-wheeled vehicle for a child is not as easy as we would like it to be. The main difficulty is that the little cyclist is constantly growing. Therefore, the modern classification of baby bikes is based on the age of the baby and his height. The size of children’s bicycles, developed directly by the manufacturers themselves:

Child’s age Height (cm) Wheel diameter (inches)
1-3 years 75–95 12″
3-4 years 95-101 12″
4-6 years old 101-115 sixteen”
6-9 years old 115-128 twenty”
9-13 years old 126-155 24 “

Considering that children grow up quite quickly, it is not worth taking a bike back to back. otherwise, you will have to buy a new model next season. Another important parameter of the children’s model is the ability to adjust the saddle and handlebars. this will allow to “stretch” the life of the bike.

The child must definitely sit on his future bike and ride it for several meters. If the model is purchased just for training, you still need to put the baby in and ask him to take the “working” position, that is, put your feet on the pedals and take the wheel. The posture of the child is a serious issue, so you should definitely not neglect the recommendations.

Length of leg

This is a more accurate measurement method compared to the first method, since it takes into account the parameters of a specific person. Measure the length of your inner thigh from heel to crotch. It is important to make accurate measurements, for this you need:

  • Stand against a wall so that your heels and buttocks touch its surface, and your knees remain straight.
  • Measure the length of the inner thigh from the floor to the crotch in centimeters.

Next, you should use the formula to calculate the appropriate size:

  • Mountain bikes (MTB), hardtails, full suspension models. leg length (cm) 0.57 = frame size in centimeters.
  • Road bikes and cyclocross. foot length (cm) 0.66 = frame size in centimeters.
  • Trekking Bikes. Foot Length (cm) 0.63 = Frame Size in Centimeters.

For example: the length of your inner thigh is 79 cm. This means that a suitable mountain bike frame height for you would be. 790.57 = 45.03 (cm). This value must be rounded to 45 cm. To convert the result to inches, divide the resulting number by 2.54. It turns out it’s 17.71 inches.