# How much to swing the wheels on a bicycle

## Bicycle tire pressure

A bicycle is a fairly well thought-out and reliable device. But if used improperly, even the highest quality elements and systems can fail faster than it would have happened naturally. Last but not least, this concerns the wheels. For example, how much the pressure in the chambers of the bike corresponds to a certain norm will depend not only on the comfort during the rides, but also on the service life of the tires.

## Air pressure for different types of tires

If you have a half slick, the low pressure negates its benefits. The meaning of the semi-slick is that, thanks to the semicircular profile, the tire rolls on a hard surface with a smooth part of the tread. And if the tire is poorly inflated, then it will be flattened, and your half-slick will paddle with its lugs even on the asphalt. Therefore, in this type of tire we pump close to the maximum pressure.

Standard cross country tires, width 2. 1-2. 3 inches requires a working pressure of 3-4 bar. Such rubber has not very pronounced lugs, it is the most versatile tire for those who ride in forests.

Tires for more extreme riding are 2.3 “and wider, and grip is very important here. The pressure is calculated experimentally so that the tire does not break through on drops and hard descents.

### Cyclist weight

The performance of a tire at a given pressure depends on the weight of the rider. For example, a 66kg cyclist might find a pressure of 2.38 atmospheres per square inch for a 26×2 tire. 25 inches is too high and the grip is not good enough. Conversely, a 113kg rider may find that their tires are under-inflated and therefore bend and deflate.

An approximate relationship between tire pressure and rider weight is shown below, which shows the inflation data for mountain bike tires with a width of 50 mm (2 inches).

Cyclist weight (kg) Pressure (atmospheres):

### The Swing Bike

• 50 kg. 2.38-2.59 atmospheres
• 63 kg. 2.52-2.72 atmospheres
• 77 kg. 2.72-2.93 atmospheres
• 91 kg. 2.86-3.06 atmospheres
• 105 kg. 3.06-3.27 atmospheres
• 118 kg. 3.2-3.4 atmospheres

## How much to pump in tires in winter

If you ride a bike in cold weather, then it must be borne in mind that in the cold, the pressure drops a little, so at home pump it about 20% above normal so that everything on the street comes into balance.

### Tire volume and pressure

Tire volume and pressure are two inextricably linked metrics. The volume of the tires determines how a certain pressure will appear to you. For example, a 700x25mm tire inflated to 2.38 atmospheres per square inch will be nearly flat, while a 26×3 tire. 8 inches inflated to the same 2.38 atmospheres will feel firm to the touch. the wheel will bounce on uneven surfaces rather than absorb them.

Much depends on the area. If you ride mostly on rocky tracks, it is better to inflate the tires a little more in order to avoid tire deflection and damage to the side section.

• Primer, potholes. pump to medium (based on the readings on the tire) or slightly less.
• Asphalt, rolled paths. pump almost to maximum.

Your riding style is just as important as the terrain you are driving. The more aggressive the driving style, the more the wheels need to be inflated. Are you trying to choose the flattest sections of the track, bypassing the hills, or do you like to drive forward with indomitable energy? Do you like to keep the wheels on the surface or do you like to bounce on the bike, overcoming obstacles??

Rim width plays an important role in determining the lowest possible pressure without sacrificing efficiency. A wide rim holds the tire better than a narrow one. It allows you to use lower tire pressure without sagging.

The design of a tire affects how it behaves at a given pressure in about the same way as the weight of a cyclist. High TPI tires are more flexible. TPI is the amount of nylon fibers per square inch of tire base. Low TPI tires have better puncture and tear resistance but are heavier. Higher TPI provides better traction, offering a smoother, softer ride and lighter construction. Typically, TPI values ​​range from 24 to 130.

## How much pressure should be in the bike?

Many cyclists ask this question quite often. All well-known tire manufacturers indicate the size of the recommended pressure on the side of the tire. Most often, this figure is in the range from 35 to 60 psi (from 2.38 to 4.08 atmospheres).

The exact answer to this question depends on many factors. First of all, this is the expected area on which you plan to ride and the “profile” of the bike. High pressure is preferable if you are driving on asphalt, as it gives excellent roll, and low pressure provides strong traction on rough terrain. Riding style and weight of the cyclist also matter.

## What are the problems

If you constantly ride on wheels with less than optimal pressure, then most likely, cracks have already formed on the side walls of your tires. This usually leads to their premature erasure. Excessively high pressure increases the risk that the tire will simply burst at the most inopportune moment.

### What should be the pressure in the tires of a child’s bike?

First of all, you need to look at the limits that are written on the tire, and certainly the pressure should not be less than the minimum specified. Further, the bulk of children weigh up to 50 kg. Therefore, for them, the pressure in the wheels of children’s bicycles must be maintained at about 2. 2.5 atmospheres. To the touch, this is a rather tight wheel and it is quite problematic for an ordinary person to squeeze it with your fingers. It is not worth pumping children’s wheels, otherwise the ride will be very hard.

If your child weighs more than 50 kg, then the pressure in the wheel should be taken from the table above.

## Standard pressure

Here are some tables that will help you navigate in difficult situations, namely:

• an unknown tire without markings was purchased;
• the marking is incomprehensible, the numbers are marked in unknown units.

## How to check chamber pressure.

Honestly. without a pressure gauge in any way. So you need a bicycle pump with a pressure gauge, a separate pressure gauge connected to the nipple, or you will have to pump up the tires at the service station. they always have something to measure the pressure in the wheels. You need to be careful with the service station. There are times when a valiant worker, forgetting about the pressure, hits the wheel with everything he can and the camera and the tire explode in a matter of seconds.

There is one piece of advice. When you know exactly what pressure is now, try squeezing the tire with your fingers. So gradually you will learn to determine the approximate pressure in the chamber by tactile sensations. Remember that already starting from two bars (atmospheres), the tire feels quite tight to the touch.

READ  How To Change A Wheel On A Bicycle

If the pressure is low, then the tire can easily break through. In addition, under-inflated wheels extinguish a large percentage of the cyclist’s efforts to accelerate and actually ride. The tire “spreads out” on the asphalt and, moreover, is very quickly erased from high friction on it.

This also leads to the so-called “snake bites”. two adjacent breakdowns. Occurs when a sharp run over a curb, stone or bump. In this case, the tire is pressed against the rim, the chamber is clamped between the rim and the object on which the wheel hit, and breaks through in two places at once.

Riding at low pressure can be dangerous for the rims, you can easily get a figure eight on the wheel. At low pressure, frequent punctures are possible, and when cornering, the tire can generally fly off the wheel, which is already life-threatening.

over, if the wheel is strongly pumped, then it can easily puncture the rim (from the side of the spokes). To protect the camera from this, use a special rim tape. This is a rubber or polymer strip that fits over the rim to prevent the spokes and sharp edges of the spoke holes from punching the tube. So a middle ground is needed. A sample of such a tape is shown in the figure on the right.

It is generally recommended to check the pressure before each ride (at least by touch). Remember that the nipple is not the only poison. The air etches a little through the rubber itself, albeit slowly. Because of this, every month, an inflated tire itself loses an average of one bar of pressure.

I would like to note one more point. When driving, the main load is on the rear wheel, while the front wheel is not so heavily loaded. Based on this, the pressure in the rear tire can be slightly higher than in the front. On average, about 10%.

## Additional tips for choosing the right pressure:

When choosing the right tire pressure for your bike, you should also pay attention to factors such as:

• The surface you are rolling on. So, when driving on rough terrain, soil or sand, it is enough to inflate the tires just above the minimum value, so the grip will be better. When driving on asphalt and flat surface, it is better to choose a value close to the maximum. this will improve the roll forward.
• Your bike type. We recommend using different pressures depending on the type of your bike. For a mountain bike, this value should be lower than for a sports road bike, for example. The principle here is that the narrower the tire, the higher the pressure in it should be. And vice versa.
• Outside temperature. In the heat, it is better not to pump the wheels to the maximum, because the air in the chamber heats up and the pressure rises additionally. And in winter, even when riding on snow, the pressure should not be lower than average in order to achieve maximum grip of the tread.
• User weight. Inflate the wheels more if you are heavy or carry heavy loads on your bike.

To summarize, it should be noted that there are no hard and fast rules for how many atmospheres should be in your wheels. And the right answer will be your accumulated experience.!

Unfortunately, bicycle theft is not uncommon these days. Especially when it comes to a large metropolis with busy streets and a large population.

At the time of buying a bike, you should pay special attention to the choice of a saddle, because a lot depends on its size and shape, including your safety.

Today, more than 280 kilometers of specialized bike paths located in almost all metropolitan districts.

See how the bike is reliably protected for sending to the regions.

The use of the site services and all active user actions on the sportiv.ru site are governed by the user agreement between the site visitor and SPM LLC.

When republishing, a link to sportiv. ru is required.

LLC “SPM”. Yur. address: 125212, Moscow, Leningradskoe shosse, 56, room II, office 10, OGRN: 1177746587941

## Bicycle tire pressure

How much inflate the wheels? Many cyclists ask this question quite often. All well-known tire manufacturers indicate the size of the recommended pressure on the side of the tire. Most often, this figure is in the range from 35 to 60 psi (from 2.38 to 4.08 atmospheres).

A common mistake many novice cyclists make is overpressure in mountain tires or insufficient pressure in the wheels of a road bike.

There are factors to look out for when looking for the ideal tire pressure:

Cyclist weight. The performance of a tire at a given pressure depends on the weight of the rider. For example, a 66kg rider may find that 2.38 psi for a 26×2.25 tire is too high and grip is not good enough. Conversely, a 113kg rider may find that their tires are under-inflated and therefore bend and deflate.

The table shows tire inflation data for a mountain bike with a tire width of approximately 2 inches.

Tire volume and pressure are two inextricably linked metrics. The volume of the tires determines how a certain pressure will appear to you. For example, a 700 x 25 mm tire inflated to 2.38 atmospheres per square inch will be practically flat, while a 26 x 3.8 inch tire inflated to the same 2.38 atmospheres will feel firm to the touch. the wheel will bounce. on uneven surfaces, rather than absorb them.

Much depends on the area. If you ride mostly on rocky tracks, it is better to inflate the tires a little more in order to avoid tire deflection and damage to the side section.

1.) Primer, potholes. inflate to an average value (guided by the readings on the tire) or slightly less.

2.) Asphalt, rolled paths. pump almost to maximum.

### The Swing Bike Story “From Dream To Reality”. 40 Years in the Making

Your riding style is just as important as the terrain you are driving. The more aggressive the driving style, the more the wheels need to be inflated. Are you trying to choose the flattest sections of the track, bypassing the hills, or do you like to drive forward with indomitable energy? Do you like to keep the wheels on the surface or do you like to bounce on the bike, overcoming obstacles??

Rim width plays an important role in determining the lowest possible pressure without sacrificing efficiency. A wide rim holds the tire better than a narrow one. It allows you to use lower tire pressure without sagging.

The design of a tire affects how it behaves at a given pressure in about the same way as the weight of a cyclist. High TPI tires are more flexible. TPI is the amount of nylon fibers per square inch of tire base. Low TPI tires have better puncture and tear resistance but are heavier. Higher TPI provides better traction, offering a smoother, softer ride and lighter construction. Typically, TPI values ​​range from 24 to 130.

Typically, tire pressures range from 35 to 48 psi (2.38 to 3.26 atmospheres). This pressure provides control over the road and maximum grip of the tires with the surface. An over-inflated tire to 50. 60 psi (3.40. 4.08 atmospheres) reduces ride comfort because the tire has less contact with the road.

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When riding on asphalt, an inflated mountain bike tire wears out very quickly.

An insufficiently inflated tire 28. 32 psi (1.9. 2.17 atmospheres) is also fraught with danger. Because of this, you can easily punch through the camera by hitting a stone or simply hitting an uneven track. Under this shock load, the chamber is clamped between the rim and the obstacle, which can cause a “snakebite”. It will be difficult to fix a puncture of this kind. There is also a high probability of damage to the rim itself, this can entail expensive repairs or even replacement with a new one. It should be borne in mind that a poorly inflated tire on a steep bend can be “ripped off”, and this can cause a fall. Most often, a breakdown occurs on the front wheel and is accompanied by a loud bang of the camera, as it easily bursts, having lost the protection of the tire

Attention! Do not exceed the pressure stated by the manufacturer on the tire sidewall!

Inflated wheels will listen better on surfaces like snow and sand.
In extreme heat, while driving at high speed, it is better not to inflate the tires to the maximum, as there may be overheating of the wheels.
In winter, the wheels need to be inflated more, otherwise there may be damage to the tires and the tube from the cold.

Road bike wheels should be inflated to 95-135 psi (6.46. 9.18 atmospheres), as the air volume in them is less than in mountain bikes.

## What pressure should be in bicycle tires (how many atmospheres)

In this article, we will answer the question that many cyclists are asking: How much pressure should the tires of a bicycle be? Immediately, we note that tire pressure is the most important factor that affects the flotation and roll of your bike. That is why the pressure in the wheels must be correct.

The required pressure will help you determine the allowable values ​​on the tires. All products, regardless of the manufacturer, must indicate the minimum and maximum allowable pressure. In rare cases, only one value is indicated. the maximum. Also, these values ​​can be specified in different units of measurement: P.S.I. pressure in pounds (American designation) or BAR. pressure in bars or atmospheres. In the table below, we have compared all possible values ​​with a person’s weight so that you can easily determine the required pressure based on your weight.

A floor or hand pump with a pressure gauge will help you to correctly determine the pressure in the wheels. Be careful when using compressor pumps, as they deliver a large amount of air at a high speed, which can lead to an explosion of the chamber.

## Bicycle tire pressure

They came in the morning to their iron horse and you see. the wheel is flat. How to pump it up? Correctly pump. And how to pump it up correctly? How many atmospheres. How often do beginners think about this. Previously, after all, how they did it. I pumped up the wheel, tried it with my fingers. will it squeeze or not. He sat down and looked at the wheels. whether they were sold or not. They sold out. let us down, did not sell out. went. It was called. to check the “bulging naval eye”.

With a properly inflated wheel, it is pleasant and easy to ride. It provides good rolling, speed, tire durability and, ultimately, the safety of the cyclist.

## What to consider when inflating

The optimal pressure to use in a bicycle tire will not only depend on the manufacturer’s recommendations. The following factors are of great importance:

• Seasonality. On hot days, you don’t need to pump your bicycle wheels to high pressures. The fact is that the air inside the chamber will warm up under the influence of sunlight. This will cause an increase in performance. In winter, when traveling on snow, use parameters below average to achieve good traction of the tread to the surface.
• Cyclist weight. With a body weight of 50 kilograms, it is necessary to swing the wheels up to 2.59 BAR, with 120 kilograms. up to 3.4 Bar. If there is additional load, the pressure is increased by 1% of the average for each extra kilogram of luggage. However, significant overloads and high parameters can provoke deformation of the rim.
• Terrain type. When driving on rolled roads, asphalt, rocky roads, the pressure in the chambers should be slightly above average. The same rule applies to stunt, sports bicycles. Riding on sandy, soft ground is better at low rates.

Tire pressures for road bikes designed for firm, level roads should be above average. Low rates are optimal for fat bikes.

The type of bike is very important. For mountain models, lower rates are selected than for road, sports options. Rule of thumb: the narrower the bicycle wheel, the higher the pressure should be.

Cyclists who monitor and adjust pressure after each ride do not face tire repairs throughout the season. In a wheel inflated according to all the rules, rubber does not puncture, does not break, and lasts longer. Always follow the manufacturer’s recommendations, regardless of the bike model.

On hot days, do not inflate the wheels to high pressures If the cyclist’s body weight is about 50 kilograms, then the recommended tire pressure is 2.59 BAR, more than 100 kilograms. 3.4 Bar. chambers slightly above average Road bike tire pressures should also be above average By monitoring and adjusting tire pressure after each ride, major repairs can be avoided throughout the season

## Pressure effect

In fact, the optimal pressure in the tires of a bicycle is a purely individual parameter, which each biker varies within certain limits for himself: for his riding style, for the planned route and the current level of training. The limits are set by technological constraints, which we will consider further.

• high pressure gives “roll-over”. rolling speed, saving the strength of the cyclist;
• excessively high, in turn, can provoke a breakdown of the chamber against the rim from the inside;
• similarly, low pressure leads to “snake bites” when a rim on an obstacle or bump pierces the chamber at two points at once and reaches the tire;
• low pressure prevents damage to mechanisms on numerous bumps;
• at low pressure better “grip” and easier to move on rough terrain.

Taking into account all the pros and cons, a single recommendation can be made: the wheels should be inflated enough to provide good traction and not damage the camera. For this, there are standards for what pressure is considered acceptable. We will consider them further.

## What to pump up

Bicycle luggage requires maintenance and pumping very often. Even on the most “hardy” city and mountain bikes, it is required to check and pump up the camera every 2-3 weeks, since the air leaks not only through the nipple, but also simply through the rubber. High pressure “helps” air molecules find their way through an insufficiently dense chamber.

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“City”, or, simply, budget bikes, it is enough to pump up once every 2-4 weeks, mountain bikes. at least once every two weeks, road bikes. once a week, and road and sports bikes. before each trip.

Therefore, the pump is not only an emergency accessory that is used only when a punctured wheel is changed, but also a necessary part of the preparation for departure. Active cyclists should consider purchasing two pumps:

• portable. as part of an emergency kit or on long trips;
• stationary with a stop and a pressure gauge. for periodic maintenance of your tires.

By the way, an ordinary car pump perfectly takes the place of a stationary pump. It is also suitable for bicycles, shows exactly how many atmospheres are pumped up, and does not take up additional space. Some people prefer to pump up on “professional” pumps at gas stations, but the lack of their professional tool can play a bad joke in the event of an unexpected situation or when you deviate from the standard route.

### Markings

What do they write on the tires? For example, (2.38-4.0) is clearly atmospheres, or BAR, and (95-135) is Psi. If the figure has more than 3 digits or the prefix “k” (kilo), we are talking about metric Pascal. Most often, the desired value is located under the size designation and is duplicated in BAR and Psi in the form of a range, clearly indicating to what pressure you can pump.

Actually, the manufacturer specifies the range within which the tire can function, then. the freedom of the cyclist.

## Measurement nuances

Safety, comfort, and riding efficiency depend on the pressure level in the bicycle tires. Parameters are indicated using three units of measurement:

• Psi. Pounds Per Square Inch.
• Bar. bars.
• Pa. pascal.

Most manufacturers, focusing on American brands, indicate the pressure in the wheel using Psi. English-language sources usually simplify it to pounds. These units of measure are considered obsolete, however, are still used in the United States.

Bar to indicate the pressure in the chamber is used in many European countries, as well as in Russia. This feature is associated with the proximity to a convenient measurement system in atmospheres. Pascal is the most correct unit, however, it is rarely used when marking bicycles.

The ratio between the listed units is as follows: 1 Bar = 100,000 Pa = 14.504 Psi. Based on this formula, you can calculate metrics suitable for any bike. To simplify the conversion of pounds to the usual Bar, you need to divide the value by 14.5. Typically, the following markings can be seen on tires:

• 2.38-4.0 are atmospheres or bars.
• 95-135. lbs.
• numbers with more than 3 numbers and the prefix k indicate metric pascals.

Most manufacturers mark the wheels of the bicycle with the designation of the optimal parameters. Indicators are duplicated in Psi and Bar in the form of an acceptable range with clear limits. It is not recommended to go beyond the specified limits, otherwise it may lead to tire damage.

The wheel pressure of a child’s bike is determined by the fitness level and weight of the child. With a weight of up to 30 kilograms, 2.4 Bar parameters are suitable. When the baby learns riding skills, you can reduce them to 2.2-2.1 Bar.

## What is written on the tires

The secret to making the right choice is very simple: just look at the inflated wheel. Next to the information about the size of the tire there will be information about the permissible pressure range in the chamber.

Why is this information not shown on the camera itself? Because in it the only point subject to real stress is the nipple, and its mechanism is very reliable. Otherwise, the normal pressure, which increases by an order of magnitude during fast skiing, is taken by the tire, and how much it will be compressed is the main limitation.

So, if the pressure is too low, the tire will break closer to the rim, bite the chamber, leading to a breakdown, and if it is too low, it may just burst on one of the bumps or when driving on hot asphalt.

## Additional tips for choosing the right pressure:

When choosing the right tire pressure for your bike, you should also pay attention to factors such as:

• The surface you are rolling on. So, when driving on rough terrain, soil or sand, it is enough to inflate the tires just above the minimum value, so the grip will be better. When driving on asphalt and flat surface, it is better to choose a value close to the maximum. this will improve the roll forward.
• Your bike type. We recommend using different pressures depending on the type of your bike. For a mountain bike, this value should be lower than for a sports road bike, for example. The principle here is that the narrower the tire, the higher the pressure in it should be. And vice versa.
• Outside temperature. In the heat, it is better not to pump the wheels to the maximum, because the air in the chamber heats up and the pressure rises additionally. And in winter, even when riding on snow, the pressure should not be lower than average in order to achieve maximum grip of the tread.
• User weight. Inflate the wheels more if you are heavy or carry heavy loads on your bike.

To summarize, it should be noted that there are no hard and fast rules for how many atmospheres should be in your wheels. And the right answer will be your accumulated experience.!

Unfortunately, bicycle theft is not uncommon these days. Especially when it comes to a large metropolis with busy streets and a large population.

At the time of buying a bike, you should pay special attention to the choice of a saddle, because a lot depends on its size and shape, including your safety.

Today, more than 280 kilometers of specialized bike paths located in almost all metropolitan districts.

See how the bike is reliably protected for sending to the regions.

The use of the site services and all active user actions on the sportiv.ru site are governed by the user agreement between the site visitor and SPM LLC.

When republishing, a link to sportiv. ru is required.

LLC “SPM”. Yur. address: 125212, Moscow, Leningradskoe shosse, 56, room II, office 10, OGRN: 1177746587941