What is the pressure in the wheels of a bicycle 26

Why maintain the right pressure?

Maintaining the required pressure in bicycle wheels solves the following tasks:

  • it does not allow the wheel to break through on the slightest bump, on cracks across the road, in case of an accidental collision with the drainage hatch, etc.;
  • pressure close to the average, but higher than the minimum, increases the permeability on dirt roads and paths with fine gravel, sandy-clay cover;
  • pressure above average, but close to maximum, will increase roll-forward on highways and asphalt streets.

Neglecting these simple rules for pumping wheels is fraught not only with frequent breakdowns of rubber, but also with the appearance of eights on the wheel rims.

All About 26 ” Bike Tire Pressure

The cyclist should check the tire pressure of his bike before setting off on his tracks or route. It is not recommended to ride on flat tires: both the rubber and the rim on which it is worn can be damaged.

Pressure for all 26 ” wheels

Wheels with a diameter of 26 inches are used for mountain, hybrid, road, extreme and teenage bikes.

The pressure in the tires of mountain bikes is chosen empirically. It is different for each cyclist. So, for cross-country models, a value of 3-4 atmospheres is chosen. it is ideal for asphalt streets and country roads.

Semi-slick tires are designed for maximum inflation. they are designed for road and street riding where there is asphalt. With weaker pumping (from minimum to medium value), the contact area of ​​the rubber with the road will increase, and it will become much more difficult to accelerate quickly.

For highway use the following minimum values.

Pounds per square inch

Extremely low values ​​are indicated. High ones range from 5 to 9. Try not to exceed them. otherwise the rubber will burst at high speed or when hitting the slightest unevenness. Pump a few tenths of an atmosphere lower than indicated in the table.

Pressure values ​​also depend on how much a particular rider weighs, and on the route on which dirt or gravel, rocky roads come across. Tire widths also make adjustments. Choose the pressure for the future by driving on the most challenging roads under the control of a pump equipped with a pressure gauge.

Wheel pressure depends on:

The pressure for which the tire is designed is indicated by the manufacturer directly on it.

Inscription in English Inflate to. literally translates as Inflate up. (Pump up to, Pressure from. To.).

For example, the figure indicates that the pressure should be from 36 to 60 PSI (from 250 to 420 kPa) or, respectively, from 2.5 atmospheres to 4.2 atmospheres.

Bicycle tire pressure versus cyclist weight

This should be immediately clarified. The pressure in the tires of a road bike always varies between 6.5-9 BAR (up to 130 PSI) and does not depend very much on the weight of the cyclist.

The pressure in mountain bikes is always lower.

Here is a table showing the dependence of the pressure in the wheels of a mountain and city bike on the weight of the biker:

You can focus on the following. for each additional kilogram of weight, the pressure should be increased by 1%.

The pressure in the tire directly affects its durability. Riding on badly inflated tires wears them out quickly.

Slicks

For driving on asphalt and well-rolled dirt roads, you need to pump up the maximum pressure.

Slick wheels are the easiest to swing for road and city bikes. Due to the fact that they have a small volume of wheels, the pressure must be high. The more pressure, the better the roll and the higher the speed. So swing boldly a little bit by 0.2. 0.4 under pumping to the maximum pressure indicated by the manufacturer on the tire, especially in hot weather.

BIKE TIRE PRESSURE WHAT SHOULD BE AND WHAT TO RUN?

Every bike lover is obliged to monitor the condition of his two-wheeled horse. It is from this that its service life and ride comfort will envy. When you go on your next trip, do not forget to measure your tire pressure. This procedure is mandatory, because the comfort while driving directly depends on it.

Oddly enough, first of all, the quality of cycling, especially on asphalt, depends on the pressure in the wheels of the bike. Under-inflated wheels easily break through and dampen a large percentage of the cyclist’s efforts, while over-inflated wheels can damage the camera and lead to its rapid wear. Accurate knowledge and experience of riding will help you find the middle ground.

What’s The Correct Tire Pressure For Your Bike? | The Explainer

Many are accustomed to checking tire pressure using the old-fashioned method with their fingers. However, this method is very imprecise, and the concept of a well-inflated wheel can be very different for every cyclist. That is why it is better to always have a pressure gauge on hand to accurately determine the tire pressure.

What to pump up

Bicycle luggage requires maintenance and pumping very often. Even on the most enduring 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.

City, or, simply, budget bicycles, 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.

How To Find Your Perfect Tyre Pressure | Hard Vs Soft Tyres

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By the way, an ordinary car pump perfectly takes the place of a stationary pump. It is also suitable for bicycles, shows, 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 absence of their own 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.

Why it’s important to inflate your tires with the correct pressure

Let’s start with the very basics, here’s a bike going down the road:

  • The more inflated the tires, the better it rolls, the less fatigue
  • The heavier the cyclist, the more you need to pump
  • The more the tires are inflated, the more it shakes on bumps
  • If the pressure is weak, then moving over the curb, you can punch the chamber on the edges of the rim (snake bite)

And now the logical question is how to find out within what framework you need to pump, how many atmospheres to pump specifically? The pressure in bicycle tires is measured in atmospheres (BAR) or PSI, and most often, the permissible range is written on the sidewall of the tire in PSI (one atmosphere is equal to 14.7 psi). Here is the average table for the average cyclist riding no extreme, on asphalt and dirt roads.

This information is enough for you to ride comfortably enough, while the tires will not suffer from over-pumping or under-inflation. Well, for those who care about details, we go deeper.

High lug tires

All toothed tires designed for travel on soft ground, sand, snow are best used with high pressure. In this case, the adhesion will be maximum.

The importance of correct pressure

As is already known from the above, the optimum pressure is most often indicated on the tires of wheels and bicycle tires. A conscientious manufacturer is obliged to provide this information to make it easier for a cyclist to control the air level in his wheels.

The pressure is different for all types of bicycles: on road models it should be significantly higher than on urban and sports ones. At first glance, it is much more convenient: such tires are more wear-resistant and much more difficult to pump them. The pressure in them can reach nine atmospheres. However, in such models, it is necessary to constantly monitor the pressure level, because the lack of air will seriously complicate and slow down movement on the surface. This is especially true for cross-country driving.

  • At the other extreme are low pressure tires. An example of this description can be models whose bicycle tire pressure does not exceed 2 2.18 atmospheres. Such tires are much more vulnerable and require an attentive, reverent and very careful attitude. Any stone, bump or knot can cause deformation and breakage, which largely determines the scope of use of these types of tires. Such tire models can be inflated less often, but you need to monitor the pressure with no less zeal than the air level in tires with higher pressure.

Bicycle tire pressure

Maintenance: the pressure in the wheels of the bicycle should not exceed 3 atmospheres

As mentioned above, a bicycle is not only a handlebar and frame, but also its wheels. Every cyclist at least once in his life, but faced the problem of tire inflation. Which air or airless tires to choose? How to pump, not to pump, how much and is there any difference at all?

These questions, despite their simplicity, are very important. This is especially true for newcomers to cycling. Correctly inflated wheels are the key to not only a successful and fast ride, but also the safety of the cyclist.

Determining the tire pressure of a bicycle is not always easy and straightforward. If you don’t have special skills, you won’t get very far in this area. The optimal pressure indicated on the tire, of course, greatly simplifies the task of sports fans, but such a hint does not solve the whole problem. Each bicycle, like each type of tire, has its own characteristics, which should not be neglected.

Market innovations

Time goes forward, discovering new flaws of the old and introducing something new. However, progress never stops, and today there is a completely new solution to the problem of pressure in the wheels of bicycles. In addition to traditional air tires, airless tires are gradually appearing on the market, which have a number of indisputable advantages over their predecessors.

This type of tire is undoubtedly safer and more comfortable, more practical and better than the traditional tires we are used to. The main advantage of this invention is the complete absence of air, and therefore the problems associated with a punctured wheel, low pressure or other types of road hazards.

  • Airless tires have left pneumatic ones far behind. The predecessors of modern perpetual tires have many weaknesses and shortcomings, because only a punctured wheel can significantly spoil plans, or, even worse, can lead to irreversible consequences, even to the death of a cyclist.

This problem was quite acute even in the war and post-war years. Safety has always been important, which stimulated people to come up with new and new methods to save the lives of drivers, both bicycles and other modes of transport.

For the first time, airless tires were used in military Humvee vehicles, after which their production was expanded and reached, by our time, industrial proportions.

pressure, wheels, bicycle

Varieties of tires

Modern technology is not standing still, offering cycling enthusiasts more and more innovations that can simplify their worries about pressure. In the beginning, leading designers offered customers better tires and rubber that could withstand heavy loads and last longer than usual.

  • Tires are different, they differ in width, pressure level, and other indicators.

Such differences are explained by the difference in the use of bicycles: some use them for movement around the city and, mainly, on flat surfaces. For such cyclists, narrower tires are also suitable, the pressure in which is much lower than in the rest. Others, lovers of extreme conditions, prefer wide tires designed for off-road and cross-country driving.

Advantages, disadvantages and scope

Of course, the lack of air in rubber, at first glance, is a solid plus and an incredible breakthrough in the cycling industry. However, this is not quite true. Airless rubber, despite all its positive aspects, is not ideal, and that is why its use today is far from ubiquitous.

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The most widespread use, in addition to bicycles, airless rubber found in small businesses and production: it is used in lawn mowers, scooters, wheelchairs and small cars used for technical purposes. Airless tires failed to conquer the auto industry and this is the main disadvantage of this invention. the inability to develop high speeds.

  • Indeed, non-pneumatic tires at high speeds can cause vibration, making the ride less comfortable. Other disadvantages include a fairly low load capacity and constant stiffness, which cannot be controlled: if the stiffness in the selected tire does not suit you, the tire will have to be replaced.

Vibration at high speeds is not such a noticeable drawback, especially when it comes to bicycle tires. If we talk about the pros, then it is worth repeating again: airless tires are the ideal solution for those who travel a lot and on different surfaces.

Depending on the terrain, tires are able to change shape, adjusting to what is under the wheel. There is less rubber in such models, which makes them much more hardy and durable, and the absence of air will provide protection against possible holes and lack of pressure. The durability of such tires allows them to maintain their original size and shape for a long time. often it is not necessary to change tires.

pressure, wheels, bicycle

It is also important to note the availability of such an innovative technology: airless tires, superior to pneumatic ones in properties and quality, almost do not differ from their predecessors in price. Changing and repairing non-pneumatic tires is easy enough. even ordinary cyclists can handle it.

Pressure plays an important role in the functioning of the rubber. However, this only applies to air models and tires. If we talk about modern technologies, then, with existing innovations, you can forever forget about the pressure level in the wheel.

Recommendations depending on the type of rubber

Optimizing the inflation rate of a bicycle tire depends on the type of tire used, and in particular mainly on the type of tire. If the bike is shod in slick or semi-slick rubber, then minimizing pressure is permissible only on hot days. As shown by bench tests of slick (low-relief) tires, a decrease in the level by 25.0% to the optimal level nullifies all their advantages.

If the bike is shod with 2.0… 2.3 inches wide tires with cross-country protectors, then the optimal pressure range is 3.0… 4.0 atmospheres (bar). A decrease in this value will require an increase in the expenditure of muscle energy, and exceeding the level of inflation of bicycle tires above the upper limit, when driving off-road, often leads to an explosive destruction of the tire.

Extreme tires (Downhill / Slalom 24 ″ × 2.10 or Kenda K905 20 x 1.95 ″) with a complex tread, are best inflated to the average recommended pressure. This will provide the necessary adhesion to the supporting surface. In the future, its indicator can be adjusted for specific driving conditions.

All About 26 ” Bike Tire Pressure

The cyclist should check the tire pressure of his bike before setting off on his tracks or route. It is not recommended to ride on flat tires: both the rubber and the rim on which it is worn can be damaged.

Factors influencing pressure selection

Reference. Tire pressure is measured in bars, kilopascals and pounds per square inch (Psi) using dial gauges or digital pressure gauges, which are available both as separate devices and complete with a pump.

The manufacturer indicates the minimum and maximum pressure for which the tire is designed directly on its sidewall under the wheel dimensions, while the PSI values ​​are usually duplicated in BAR and kPa.

The relationship between the units is as follows: 1 bar (atmosphere) equals 100 kPa or 14.504 Psi.

In order to properly inflate your tires, consider the following:

Bike Tyre Pressure Explained | Road Bike Maintenance

  • bike type;
  • terrain relief;
  • the condition of the road surface;
  • ambient air and coating temperature;
  • weight of the cyclist (biker, rider, cyclist) and the transported cargo;
  • type, size and material of the tire;
  • design features of the rim;
  • cycling experience and driving style.

Depending on the type of tire

When choosing a tire pressure, the type of bike plays an important role, or rather, the size of the wheel, the width of the rim and the type of bike tire that is installed on it. It should also be borne in mind that on a bike, the tires of the front and rear wheels may differ from each other.

  • Slick (slick in colloquial English means smooth). these tires are characterized by a complete lack of tread or its very low height, and are designed for prepared tracks with good coverage. Due to the high internal pressure, they have minimal contact with the roadway, which allows them to develop maximum speed.
  • Semi-slick tires can be classified as universal tires. Due to the tread, which is weak in the middle part and has lugs on the sides, these tires, when inflated close to maximum, can be used on asphalt roads. When driving over bumps and natural ground, you can get more contact with the surface by lowering the tire pressure to a medium level.
  • Studded. designed for driving on dirt roads and off-road (mud, snow and sand). Their winter version can be with protectors in which metal spikes are installed for movement on ice. The pressure in such tires is selected individually for different soil and weather conditions.

Attention. All tires should be installed in the direction of the arrow (marked on the side surface), which indicates the direction of rotation of the wheel.

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’s 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.

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Tire volume and pressure are two inextricably linked indicators. 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 psi will be practically flat, while a 26 x 3.8 inch tire inflated to the same 2.38 psi 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.

Your riding style is just as important as the terrain you are driving. The more aggressive the riding 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.

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 pinched between the rim and an 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 badly 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 indicated by the manufacturer on the tire sidewall!

On surfaces like snow and sand, inflated wheels will respond better. In extreme heat, when 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.

The pressure in bicycle tires is a very important parameter, it should be understood what restrictions are imposed by tire manufacturers and which riding style of a particular rider can be improved with just a couple of strokes of the pump handle. In any case, how many atmospheres to pump at each moment is a unique decision, and it is made, rather, based on accumulated experience than according to strict rules.

Whatever your weight, bike parameters and road quality. you will not find the optimum pressure right away. It is only achievable after a few trips. And there is no need to change a dozen of punctured cameras and burst tires in order to calculate it.

How to properly inflate your bike, see below.

Wheel design

The wheels of modern bicycles are structurally quite complex, and have design features that depend on the purpose of the bike, the perceived loads and operating conditions. The standard wheel of a regular (non-sport) bike consists of:

  • one-two-three-walled rim;
  • bushings;
  • set of spokes with nipples,
  • bypass safety tape. flipper;
  • bicycle tire.

Structurally, the rim is connected to the hub by spokes with nipples. A bicycle tire is put on the rim, to protect it from direct contact with the lower part of the nipples, a bypass tape is used.

Bicycle tires are single-chamber and double-chamber. In the Old World, on road and mountain two-wheeled vehicles, a two-chamber bicycle tire, consisting of a thin-walled rubber tube and a protective tire, has become prevalent. In the United States, cyclists prefer to use a single tube tire. Air is pumped into the bicycle tire (chamber) under a certain pressure.

pressure, wheels, bicycle

Question. what should be the pressure in a bicycle tire?. does not have a definite answer. Its value is determined not only by the technical parameters of the bicycle, the type of road surface, the air temperature, but even by the manner of driving a two-wheeled vehicle by the cyclist himself. However, every cyclist is obliged to know the limit values ​​of the pressure indicator.

Consider what parameters are affected by an increase or decrease in wheel pumping:

  • Correctly selected increased pressure improves the dynamics of the bike, realizing a longer high-speed roll, which allows the cyclist to save his muscular energy;
  • an excessively high level of pumping of the bicycle wheel chambers increases the likelihood of the inner surface of the rim breaking through the chamber
  • Low pressure in the tube improves the shock-absorbing ability of the bicycle while increasing the likelihood of puncture damage to the tire and tube;
  • a weakly inflated bicycle wheel is guaranteed to provide better grip of the tread to the road surface, which is of great importance for off-road cycling.

Based on these prerequisites, the cyclist’s golden rule can be derived. the level of pumping of the bicycle wheels should ensure sufficient adhesion of the tire to the supporting surface and not cause damage to the camera.