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 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 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 put on 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. At a 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.

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.

Bike Tyre Pressure Explained | Road Bike Maintenance

Seasonal changes

Seasonal adjustments are quite serious, mainly related to mountain bikes. In the summer, you should slightly underestimate the pumping and not rest on the maximum. Hot asphalt also heats up the air inside the chamber, which increases the volume and therefore the pressure. Also, a pumped-over tire wears out very quickly.

In winter, you should sometimes slightly exceed the maximum in order to achieve maximum work from the tread, especially if the rubber is selected with spikes.

Approximate values ​​by 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.

You can also give recommendations for inflating wheels with different tires.

If the bike is “shod” in tires 2.0… 2.3 inches wide 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 consumption of muscle energy, and an excess of the inflation level of the bicycle tires above the upper limit, when driving off-road, often leads to an explosive destruction of the tire.

Extreme tires (“Downhill / Slalom 24” x 2.10 “or” Kenda K905 20 x 1.95 “) with 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.

BMX stunt models should be inflated medium, between high and low, to have sufficient traction, and then subtly varied for each stunt.

For winter riding, it is worth choosing a pressure slightly higher than normal, since at sub-zero temperatures the air in the tire becomes denser and takes up less space.

Children’s bicycles

For children, it is better to inflate the tires to the maximum allowed value. This will make it easier to learn to ride a bike, as well-inflated wheels have a smaller contact patch and the rider has to put in less effort.

How riding style and tire pressure depend.

When a cyclist trains on relatively flat asphalt roads, country and forest dirt roads and paths. For this style of riding, I prefer to pump the wheels up to 3.5-4 atmospheres. Such a high bar value allows you to achieve good speed characteristics, high rolling, but when it hits bumps and stones, the fifth point immediately feels all the irregularities of the road surface.

For those who like walking at low speed along the flat roads of parks, 2.5-3 atmospheres will be enough. On the Internet, you can often find recommendations to pump 2-2.5 bar into wheels, this is justified only for tires at least 2 inches wide and subject to driving over rough terrain or poor coverage. Low pressure increases traction and comfort, but reduces roll on flat pavement. You should not ride at a pressure less than 2 atmospheres under any circumstances.

The choice of the terrain, on which you prefer to ride, obliges you to choose a certain type of tire, but in general, if you have a universal tread, you can make your ride comfortable on a particular type of road surface by changing the amount of atmospheres on the wheels. The figures below are based on a standard 2-2.1 ″ tire.

For gravel, mud, grass, sandy surfaces, it is better to pump up to 2.5 atmospheres, which increases the adhesion of the tread to the ground and allows the wheel to smooth out all the irregularities of the road surface well enough.

For flat asphalt tracks, feel free to use a pressure of 3 bar or more. However, there is one but. If you have a fairly bald tread (wheels with poor relief or slick tires), and you are driving at high speed on wet or even wet asphalt, then you risk slipping (flying out) when cornering. If it rains on the road, just slow down or slightly deflate the tires.

This article describes the most acceptable criteria for choosing tire pressure, but since each person independently selects the most convenient pressure values, I advise, first of all, when mastering a bicycle, experiment.

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.

Weight changes

For heavy riders or heavily loaded bikes, it is very important to add pressure, as a lot of mass will squeeze the wheel of the bike and problems with insufficiently inflated cameras can come out much earlier.

Recommended pressure for weight addition is 1% for every kilogram of rider weight over 50.

Determining factors

Despite the recommendations of the manufacturers, such a parameter as the pressure in the wheel chamber is a matter of personal preference. Each cyclist adjusts this parameter for himself, for the track on which he is going to ride, for his personal riding style and level of technical training. Therefore, how much should be pumped up, everyone decides for himself. Every experienced rider knows a number of factors and operates with them:

  • The rider approaches the parameters to the maximum if he wants to add speed to the bike while riding and at the same time save his strength.
  • The cyclist approaches the minimum value for better traction.
  • Low inflation helps to smooth out minor bumps in the road while driving.
  • Over-inflated tires will lead to tube breakdown on the rim.
  • Under-inflated tires will also cause tube damage from snake bites.
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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 hence 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 “eternal” 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 has 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.

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, this 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.

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.
pressure, wheels, bicycle

These differences are explained by the difference in the use of bicycles: some use them to move 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 rough terrain.

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.

The widest application, in addition to bicycles, found airless rubber 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 carrying 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 you to maintain the original size and shape for a long time. often it is not necessary to change tires.

It is also important to note the availability of such an innovative technology: airless tires, superior to pneumatic ones in properties and quality, hardly 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.

Road bike pressure

First, let’s consider the simplest case. bicycles on which you move on asphalt roads. The air pressure in the tires of road and road bicycles should be maximized. This is explained by the fact that for such bikes the roll is important, the better the roll, the higher the speed and less effort is spent to maintain this speed. The roll depends on the size of the contact patch of the tire with the road, therefore, the higher the tire pressure, the smaller this very spot.

Roughly speaking, if you only ride on asphalt, then the pressure of the bicycle wheels should be maximum. You can find out the maximum value by the marking on the tire. It is usually indicated in psi and atmospheres (Bar), swing the maximum, you can’t go wrong.

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Marking of the maximum allowable tire pressure for road bikes

Mountain bike tire pressure

With mountain bikes, everything is much more complicated, since you have to choose between coasting and cross-country ability, and the tires indicate the range of permissible pressure values ​​from minimum to maximum.

Marking the range of permissible pressure on a mountain tire

If the tire pressure is closer to the minimum, then the permeability will be higher due to the large contact patch, but the roll will deteriorate and the risk of getting a snakebite increases. This is a puncture that occurs when you hit an obstacle, when the camera is clamped between this obstacle and the rim of the bike. In addition, low pressure increases the chances of rim damage.

Mountain tires, inflated to their maximum value, have good roll, but flotation suffers. It can be concluded that mountain bikes should be pumped at the average level. And best of all, empirically find the right value for yourself.

Air pressure depending on the type of tires

For mountain bikes, there are several types of tires, and for each of them the pressure is different.

So for semi-slickers, you can recommend the maximum pressure. A badly pumped half-slick loses its universal properties. The side lugs of such a tire should only work on soft ground, and not on asphalt, this, in turn, can be achieved only at maximum pressure.

Mountain tires that range from 2.1 to 2.3 width should be kept in the middle of the tire pressure range. These tires are suitable for driving along forest paths.

Extreme tires are over 2.3 in width and pressure should be kept to a minimum but still able to withstand impacts from obstacles.

Bicycle tire pressure

Today we will look at the topic. bicycle tire pressure. Since it is impossible to give clear recommendations in this matter due to the presence of many factors affecting the choice of pressure, in this article we will talk in detail about how to pump the tires of a bicycle, depending on the type of bike, type of rubber, weather conditions and the weight of the roller.

Many beginners believe that when inflating the wheels, it is enough to check the pressure by pressing your fingers on the tire, but this is wrong, since there are a lot of subtleties in this matter. The pressure in the chamber and, accordingly, the tire of the bicycle wheel directly affects the roll, passability, puncture frequency and ride comfort.

Dependence of tire pressure on the weight of the cyclist and weather conditions

Although the weight of the catalyst and the air temperature affect the required pressure, it is insignificant. The higher the weight, the higher the pressure. The colder, the higher the pressure reserve, since it is known that air is compressed at low temperatures.

It is also worth noting that rubber itself etches air, so it must be periodically pumped up. Road bike tires must be pumped before every ride.

This was a short course on bicycle tire pressure. If you have something to add or have questions, use the comment system at the end of the article.

WHAT PRESSURE SHOULD BE IN THE TIRES OF THE BIKE (MOUNTAIN AND ROAD TYPE)

All novice cyclists are always worried about the same questions. how much should the tires be inflated, what pressure should be in the bicycle tires to ensure a comfortable and safe ride, and is it worth purchasing a high-pressure pump? Let’s talk about all this now.

So how much pressure should a bicycle tire be? Every novice cyclist is interested in this issue. And rightly so! The overall comfort and safety of movement largely depends on the pressure in the tires. Now a little more detail.

If you ride semi-slick tires, these tires lose their benefits at low pressures. The essence of semi-slick is that the smooth part of the tread touches the hard surface, thanks to the semicircular shape. And with the side part of the tread, the tire touches the road only if it hits soft soil.

If tires of this type are not inflated enough, then they will be flattened, and your half-slickers, even on asphalt, will rake with side parts. For this reason, tires of this type are inflated to almost maximum pressure.

If you are a fan of standard XC tires, which are between 2.1 and 2.3 inches wide, you should maintain a tire pressure of 3-4 bar. Such rubber does not have overly pronounced lugs and is the most versatile for people who like to ride in the forest.

If extreme riding is your thing, then your tires are probably 2.3 ″ wide. Here the grip parameter comes to the fore. The calculation of the pressure for tires of this type is carried out experimentally so as not to puncture the tire on any bumps and steep descents.

Naturally, you should not always carry a pump with you and pump up or lower the wheels at every minimal change in soil and other conditions.

It is enough, just, to spend half an hour of your precious time and experiment with the pressure in the tires of your bike. Believe me, the result is worth it.

HIGH PRESSURE PUMP FOR BIKE AND BIKE FORKS

And if your bike is equipped with air shock absorbers, then buying such a pump is completely optional. Many bike shops provide services for pumping air shock absorbers free of charge.

Bike Tire PSI: How Much Air Should You Put in Your Bike Tire? || REI

However, if you want to conduct a couple of three experiments and pump up the pressure in the plug in different ways for certain conditions, or you just want to have such a pump always at hand. then get it safely.

Most often, this is a fairly neat pump, similar in appearance to a regular one, with only one difference. a built-in pressure gauge. Next to the pressure gauge, you can see a button designed to bleed air. That is, if you have pumped over the pressure in the plug, then by pressing the button, you can easily reset the pressure value to the required.

When using such a pump, you need to remember that when you unscrew the valve from the nipple, the air from the plug will bleed a little.

For example, if your bike is equipped with a fork that has two air chambers, then when you unscrew the pump from the positive chamber (which has a larger volume), the pressure drop is almost not felt. But for a negative camera (with a smaller volume) this figure can reach 10psi.

When the valve is screwed on, no pressure drop is observed. For this reason, it is necessary to pump a little more into the negative chamber, since the excess will bleed off by itself during unscrewing the pump.

26 “BIKE TIRE (MOUNTAIN TYPE)

Tire pressure is critical to getting the most out of your mountain bike. I would like to give an explanation right away, speaking about the tire pressure of a 26 ”bicycle, we mean the pressure in the tires of a mountain bike, since wheels of this size are installed on the mountain bike. So what factors should be considered when choosing a pressure? on this later.

Let’s take a look at some of the reasons to consider when inflating twenty-six inch mountain bike wheels:

  • Cyclist Weight: For example, a cyclist who weighs 65 kg and rides a bicycle with 26 ”tires inflated to 35 psi will think the wheel needs to be lowered because the traction is not very good. But, a rider weighing 110 kg will think that the wheels should be pumped up a little more, since the tire floats on the rim and there is even a possibility of its dismounting.
  • Tire size: the dependence of the tire volume on the pressure is well felt to the touch. For example, if your 26-inch wheel has 35 psi pumped in, then it will be quite solid. But if 35 psi is pumped into a tire with a larger diameter, then it will bend easily. The same goes for the thickness of the wheel.
    Road: What kind of ground do you ride? Since we are talking about mountain biking, then on your way, most likely, roots and stones. In this case, the wheels should be inflated more tightly in order to avoid a breakthrough of the chamber and a bent rim.
  • Driving style: This is as important a factor as the terrain you are driving on. Mountain bike owners are more likely to have a more aggressive riding style, hence the pressure should be slightly higher than for a measured ride on a carefully planned trajectory.
  • Rim Thickness: This parameter plays a very important role in determining the minimum pressure value. A wider rim will hold the tire better than a thinner rim. If the wheels are equally inflated, the chance of a tire falling off a wide rim is much lower than a narrow one.
  • The tire itself: The braiding in the tire affects its behavior in the same way as the rider’s weight. A tire with more threads is more flexible than one with fewer threads. The difference is felt quite strongly. In addition, since you have a mountain bike, it may well be that you are using tires with reinforced sidewalls, for which the pressure should be less high. This also needs to be taken into account.
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That’s all, the main points to pay attention to are described above. But keep in mind that it is not so easy to choose the ideal pressure in the tire “for yourself”, so we take a pump with a pressure gauge and select the very ideal pressure.

Which bicycle pressure gauge to choose

As practice shows, the most convenient pressure gauges are included with the bicycle pump. Such devices have a price of 450 rubles, but it is better to buy those that are more expensive than 1000. There are portable mini-devices with the same pump and a compact measuring device. There are electronic versions of pressure gauges, when buying which you need to remember that you need to use them especially carefully.

There are about 10 companies in Russia whose products (with the exception of narrow-specification devices) are not inferior to foreign manufacturers in terms of a set of technical characteristics and significantly save the budget of cyclists.

Only owners of road bikes will have to buy a pressure gauge more expensively, for whom the need for pumping up and taking measurements arises almost every day.

The choice of a bicycle pressure gauge entirely depends on the taste, needs and capabilities of each rider, but the need to purchase it is obvious: the art of beautiful safe riding will not tolerate measurements by eye. Good luck on the road and enjoy your ride!

Weight correction

Heavy cyclists, or those who like to overload their bike, need to adjust for weight when inflating their tires. Namely, pump the tires a little. Otherwise, the wheel will be squeezed under the weight of the weight and this can lead to negative consequences. How much to download in this case, everyone decides for himself. Experts recommend adding one percent of pressure for each kilogram of weight.

Seasonal changes

It is recommended to adjust the tire pressure value according to the season. This is especially true in the summer period, when the high air temperature heats up the asphalt. Bicycle tires heat up on contact with hot asphalt. From heating, the air pumped into the chamber expands, which increases the pressure in it. Therefore, in the summer season, it is recommended not to pump tires to the maximum, but to leave a small margin. If this is not done, the tire will become pumped from heating and quickly become unusable.

In winter, it is recommended to swing tires slightly exceeding the maximum. This will allow for more efficient tread performance.

HIGH PRESSURE PUMP FOR BIKE AND BIKE FORKS

And if your bike is equipped with air shock absorbers, then buying such a pump is completely optional. Many bike shops provide services for pumping air shock absorbers free of charge.

However, if you want to conduct a couple of three experiments and pump up the pressure in the plug in different ways for certain conditions, or you just want to have such a pump always at hand. then get it safely.

Consider, in general terms, a fairly good average price pump.

Most often, this is a fairly neat pump, similar in appearance to a regular one, with only one difference. a built-in pressure gauge. Next to the pressure gauge, you can see a button designed to bleed air. That is, if you have pumped over the pressure in the plug, then by pressing the button, you can easily reset the pressure value to the required.

When using such a pump, you need to remember that when you unscrew the valve from the nipple, the air from the plug will bleed a little.

For example, if your bike is equipped with a fork that has two air chambers, then when you unscrew the pump from the positive chamber (which has a larger volume), the pressure drop is almost not felt. But for a negative camera (with a smaller volume) this figure can reach 10psi.

When the valve is screwed on, no pressure drop is observed. For this reason, it is necessary to pump a little more into the negative chamber, since the excess will bleed off by itself during unscrewing the pump.

Weight changes

The pressure should also be adjusted depending on the weight. Above is a table with values. If you periodically stand on the scales, losing weight or gaining muscle mass, you need to adjust the degree of pumping of the wheels at least once a month.

Recommended tire pressure based on rider weight:

What to pump up?

In the Russian bicycle accessories market, you can find both conventional and telescopic pumps. The latter are compact in size, so on mountain bikes they are often attached to the seat tube of the frame or to the lower tube of the front triangle (depending on the features of a particular model).

You can also inflate bicycle tires with a compressor. This procedure is best done with a pressure gauge attached to the hose. It will allow the cyclist to accurately select the optimal pressure level and make sure that the tires are not over-inflated.

The choice of one or another tool for inflating the wheels largely depends on the type of valve installed on the camera. They are of three types:

  • shredder (standard automotive nipple);
  • “Presta” (compact nipple with a button at the top);
  • Dunlop nipples.

Below you can see each of the varieties.

It is noteworthy that for pumping the chamber with the presence of a standard automotive nipple, additional devices are not required. In other cases, it is imperative to have special adapters with you. Otherwise, the pump cannot be screwed into the nipple.