How much pressure should a bicycle tire have?


When it comes to bicycles that run on prepared roads, that is, two-wheeled: city, trekking, cross-country, road, etc. it is worth trying to get closer to the minimum recommended by the manufacturer. This value will not slow down the tires significantly, but will significantly increase comfort and traction. If you are clearly heavier than around 90-100 kg, you can try to get closer to the upper limit, but don’t overdo it. The tire must always run smoothly and not be as hard as stone. You can even ask the person riding with us to see if our tires flex when hitting bumps or obstacles. This should work a little. On road bikes, users often use maximum values. but this only makes sense when the road surface is perfect and the weather is good. Only then will the benefits of lower resistances outweigh any other losses.

If, on the other hand, we are talking about bicycles that ride on difficult terrain, with very limited grip. that is, mountain, cross-country and gravel bikes, it is worth going even below the minimum pressure recommended by the manufacturer. Of course, in the case of narrow tires (gravel and CX), this will be at the expense of a significant increase in the risk of catching sneakers, but remember that these are absolutely rigid bikes, and the tires in them are almost the only source of grip and comfort. When it comes to MTB. as we wrote above. values ​​well below 2 atmospheres are normal for bicycles with 29-inch wheels and wide all-terrain tires.

In this way. For recreational and service bikes and road bikes, we recommend looking for the ideal pressure in the range described on the tire, with an emphasis on experimenting with the lowest possible value. On the other hand, in the case of cycling on rough terrain, mainly MTB, it is worth going below the recommended minimum. As low as possible, but enough so that the tire doesn’t flatten too much and slows us down in the easy stages. By the way, it did not become susceptible to compression and did not work too hard in corners (the problem of tires with soft, thin sidewalls).


The advantages of using high pressure include lower rolling resistance, that is, faster driving and less risk of damage to the tire or inner tube when compressed. However, driving on very hard tires has many more disadvantages than advantages First of all, the tire is not very susceptible to deformation, which means that it absorbs bumps unevenly, and worse (you can overcome discomfort), it holds the surface much worse.

Mountain Bike Tyre Pressures – Everything You Need To Know

It doesn’t work when cornering, it doesn’t fit into the terrain, and wherever there are irregularities, it jumps like ping-pong. As a result, it provides much poorer grip, which means we have less cornering safety, more braking distance, and less smooth ride. Not only that, scientific studies show that such a tire constantly creates micro-shocks when it rolls on a less smooth surface, which wastes our strength.

So the facts are that pumping up to the manufacturer’s recommended pressure range only makes sense if: the surface is perfectly smooth, the rider weighs over 100 kg, or has a unique tendency to catch rubber when tapped. Otherwise, a tire that is too stiff will have little grip and be uncomfortable.


On the other hand, we have a low pressure due to which the tire starts to work. Lies on the ground, works gently in turn. It offers significant shock absorption and better traction. Does it have any disadvantages? If we don’t get too low. no (in terms of driving performance, of course). The facts, however, are that there is a fine line between a perfectly shock-absorbing and grippy tire and an under-inflated tire. To achieve the above, we want to pump as little as possible. This, in turn, can lead to too much flattening of the tire during travel and slight wiggle when pedaling. In this case, the rolling resistance increases significantly. In addition, too little air can easily damage the compression. This is why it is worth applying as little pressure as possible, but not sinking so low that we feel that our back is clearly swinging. It is designed to wrap around terrain and does not create excessive elasticity in the tire.

However, while driving many tires, we have noticed that the minimum pressure recommended by manufacturers is usually so high that it is difficult to talk about any flattening or a clear increase in the risk of a defect. For example, for a 29 “x 2.2” MTB tire, the minimum recommended pressure is usually 2.1-2.2 bar. This is a lot, because, for example, most players use values ​​of 1.4-1.7 bar with a weight of about 55-70 kg, 1.6-1.9 with a weight of about 70-85 kg, or 1.8-2.1 with a weight in the range of 80-100 kg. They do this because the gains from low pressure are enormous, and it is still so much that there can be no question of a dramatic increase in rolling resistance or a clear risk of impact.

Bicycle tire pressure. what should be?

Inflation of tires is one of the basic services performed by every cyclist. First of all, it should be said that the correct pressure is selected individually for each bike user, taking into account his weight, bike type, wheel size, tire width, riding style and personal preference. Sounds complicated? Perhaps, but in practice it is enough to follow a few tips and then through trial and error you can get a feel for which setting is best for you. It’s worth your time for the whole process, because given how much pressure is actually changing, the game is just worth the candle.

While riders and advanced riders who treat cycling as a passion usually know how to set the right pressure, among beginners or cyclists, one of two absolutely extreme practices can be seen. A large group of cyclists use tires with too low pressure. Probably because there is no permanent access to the pump. The second group, on the other hand, are people who inflate tires “on stone”. Perhaps an increase in pressure “in reserve”. this is also a mistake. The fact is, neither too high nor too low a pressure is good. This should be appropriate, that is, within the range suggested by the manufacturer (although even lower in some cases).


Each bicycle tire has a minimum and maximum pumpability written on the side of the tire. There is also a tendency among advanced MTB, cyclocross and gravel bike users to use values ​​that are even lower than the recommended ones. Since there can be up to 2 bar in a tire compartment (eg 2 to 4 bar), it should be borne in mind that when using extreme pressures from such a compartment, our motorcycle will behave completely differently. Before we move on to the answer to the question “how much to pump?” so we want to indicate what we gain and what we lose by using a higher or lower pressure.


Of course, as often as necessary, i.e. with a loss of air. Remember that thin tires with high pressure (e.g. 7 bar) will lose air faster than MTB tires inflated to 2 ATM. Therefore, it is possible to establish certain (very general) patterns, which we check in tires up to 32-33 mm and, possibly, supplement them every week, and in wider tires. every 2 weeks. These are, of course, only estimates and averaging. Air loss is affected by the thickness of the inner tube or the presence of tubeless tires. For example. thin latex tubes need to be pumped every ride. That is why it is worth checking and, if necessary, adjusting the pressure before every ride in which we care about the “quality” of our tires (the ambient temperature also affects them). Apart from these cases, for example on a city bike or other recreational and service bike, it is worth checking them every two weeks for peace of mind.

Standard pressure

In the event that you purchased tires from an unknown manufacturer, you may find that they do not have units of measurement or markings in units that are unfamiliar to you. Then you can calculate how much to inflate the tires of the bike, focusing on the weight and type of bike. In this table you will find recommendations for the pressure in the bicycle tires in bars (atmospheres) and PSI for the mountain bike:

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Cyclist Weight (kg) Pressure (psi) Pressure (Bar)
fifty 35-38 2.38-2.59
63 37-40 2.52-2.72
77 40-43 2.72-2.93
91 42-45 2.86-3.06
105 45-48 3.06-3.27
118 47-50 3.2-3.4

For a road bike, the tire pressure needs to be maintained in a higher range. from 6.5 to 9 Bar (up to 130 psi, respectively).

Tire markings are great

much, pressure, bicycle, tire

Bicycle wheels can sometimes be found with all three pressure rating systems. The side of the tire indicates to what indicators the wheels can be inflated. Taking into account the conditions in which the bike will be used, on what surfaces to ride, its owner determines the desired value, since the min and max range is prescribed on the tires.

  • On rubber, you see numbers up to 10 (2.8-4.6 as an option). therefore, this is a measurement in atmospheres (Bar).
  • Tens to Hundreds (40.65; 95-135). Pounds Per Square Inch (PSI).
  • Before you are three-digit numbers (for example, 280-460) or there is a prefix “k”. in kilopascals.

Important! It is not recommended to overestimate the indicators prescribed on the sidewall of the tire in order to avoid damage.

How to find the perfect pressure for your bike

There are no universal rules for how many atmospheres you need to inflate the wheels on a bicycle. Everything is learned with experience, in accordance with the driving style, route and common sense. On the tire you will find the min and max values ​​from the manufacturer, but only you yourself know your weight, whether it is worth taking it into account when inflating tires, in what conditions you will use the bike, whether you will ride it, avoiding potholes and bumps or rushing forward with uncontrollable energy and overcoming obstacles. The same pressure level for one rider will be optimal, for another it will seem too low, for the third. not high enough. Gaining hands-on experience will help you understand the ideal tire pressure for you.

Children’s bicycles

For a child. novice cyclist, it is better to inflate tires to the maximum allowed limits. With these tires, the cyclist spends less effort to move, which makes learning to ride a bike easier and easier.

If your child’s weight is close to 50 kg, refer to the units in bars or psi in the table above.

Approximate figures by type of rubber

Based on what will be the surface of the track, the cyclist selects the type of tires for his two-wheeled companion. Coverage, of course, dictates how inflated your bicycle wheels should be.

  • Slick and semi-slick bike tires are used for traveling on asphalt and unpaved surfaces. It is better to inflate such tires to the maximum. the lower the pressure in them, the worse the roll and the lower the rolling speed. Unless in the heat, it is permissible to minimize the pressure by 0.2-0.4 below the maximum, which is prescribed by the manufacturer on the side of the tire.
  • Mountain bike tires (used for riding on soft ground), as well as winter tires for snow and ice crust, are pumped slightly above normal. this will give excellent traction to the surface.
  • For cross-country tires, three to four bars are considered optimal. Wheels pumped above these indicators may simply not withstand the peak load and explode. And the under-pumped will force the rider to spend a huge amount of effort on moving.
  • For stunt bikes, “shod” in tires with complex tread, it is more correct to maintain the pressure indicators at an average level. choose between the max and min values ​​written on the side. This will give you the best possible grip. As you ride, you will be able to adjust the pressure reading based on the surface conditions and how much grip you need to achieve.

It also matters which type of bike you choose. The most commonly purchased mountain bikes with a wheel diameter of 26 “are comfortable to ride both on urban asphalt and on rough terrain.

It is worth remembering that the larger the diameter of the wheels, the higher the volume of air that will need to be pumped into them. True, if you take the same mountain bikes, in their case the wheel diameter is not important. 26 or 29 ″, to determine the required pressure level it is still better to take into account the rider’s weight indicators, his riding style and the type of terrain.

Gradually, by experience, you will determine how much atmosphere should be in your bike’s tires, based on your preferences and the usual route.

How is the pressure checked after inflation?

You can find out the exact readings only with a pressure gauge. Buy a bicycle pump already with a pressure gauge, or at least a separate pressure gauge for bikes. At the service station, you can also check the pressure and pump up the wheels, if necessary, with a car pump. However, here you need to be extremely careful and careful, watch out for pressure. Otherwise, you can get carried away and ruin the tires.

Over time, you can learn to tactilely determine how inflated your tires are. To this end, squeeze the tire with your fingers when you have just inflated it and know exactly how much pressure is in it. Gradually, you will remember this feeling of optimally inflated wheels.

Bike type

The wheels of a road bike are inflated almost to the upper limit specified by the tire manufacturer, before reaching 0.2-0.4 atm. This difference guarantees the safety of the tire from bursting at an increase in temperature and pressure.

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

A mountain bike requires an individual selection of the parameters of the normal air pressure in the wheels, depending on the weight of the rider and the terrain of movement. Experimentally, taking a pump with a pressure gauge with you on a trip, you need to find the pressure at which the balance between coasting and grip will be the best.

Important! Do not exceed the maximum or lower the minimum recommended for your tires.

Tire care and repair to drive longer

Bicycle tires last a long time. Over time, a tire wears out due to tread wear. In order for tires to last a long time, you need to properly operate and store them. With a reduced pressure in the tire, destruction occurs, small cracks appear, the bending of the sidewall is deformed.

All this leads to faster tire wear. Uneven tread wear is affected by harsh braking. And it is also possible to shift along the rim during braking and rupture of the chamber in the area of ​​the nipple. To avoid this, try to brake smoothly without sudden stops.

In case of mechanical damage to tires, a repair kit will help you. You should always have it with you because you do not know where trouble will overtake. With a little skill, you can quickly and easily repair the puncture site and continue on your way.

Why Observe Correct Tire Pressure

The tire pressure of a mountain bike is an individual parameter that is indicated on the tires. Usually the maximum and minimum values ​​are indicated.

That is, the value can be varied and benefit from this.

Why maintain the correct pressure:

Poorly inflated wheels can cause the camera to breakdown when hitting a small obstacle.

A value within normal limits, close to the minimum, improves traction on poor roads, especially mud and rough terrain.

A value within the normal range, close to the maximum, gives an advantage in speed and allows the driver to save energy.

Too high pressure can cause tire rupture.

Reduced pressure smoothes out bumps in the road and provides additional cushioning.

With these factors in mind, you can vary the inflation rate for additional ride benefits.

How to check the pressure after inflation

The exact value can only be checked with a pressure gauge. Therefore, you need a pump with a pressure gauge or a separate electronic bicycle pressure gauge. You can go to a car service to check the pressure and pump up the wheels. But before pumping up your bike with a car pump, think about it. After all, the auto repairman may not pay attention to the pressure and ruin your tires.

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Experienced cyclists can measure pressure by eye. You can inflate tires with a pressure gauge, memorize the value and squeeze the tire with your fingers. Remember the feeling, so you learn to understand how inflated your wheels are.

Why it is necessary to monitor tire pressure, and what leads to improper use

When choosing the individual parameters of the pressure in the tires of your bike, you should take into account the various nuances that may arise with excessive or insufficient inflation of the wheels for different types of bicycles. We systematize the features of operation for both options.


The temperature difference between the ambient air and the road surface in winter and summer seriously affects the readings of the pressure gauge. In the heat, the pressure inside the bicycle rubber increases, in the cold it drops. This should be taken into account when inflating the wheels.

Summer pressure parameters must be reduced, avoiding approaching the maximum values, in order to prevent the tire from bursting. In winter, sometimes it is even possible to exceed them, this will only improve the comfort and safety of traffic. Especially inflating tires to the upper limits is shown when driving in snow.


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.

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.


All novice cyclists are always concerned with 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 tire pressure. 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.

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

If tires of this type are not sufficiently inflated, 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 cross country 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.


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 wheel thickness. Road: What kind of ground are you riding on? 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.

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.


It is worth considering the tire pressure rating for each riding style. It is generally known that normal riding on a road bike is considered to be riding with wheels with a pressure of 6.46. 9.18 atmospheres. A completely different situation with mountain bike tires.

Now let’s move on to the riding style.

I drive on relatively flat asphalt roads, country and forest dirt roads and paths, I like to drive fast. 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 unevenness of the road surface.

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For those who like walking at low speed on 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 drive 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 surface, 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.

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


Mountain bike tire pressures should be between 2.38 and 4.08 atmospheres. The lower amount of atmospheres in a mountain bike is due to the large volume of air in the chamber, which in turn affects the lower loss of tire pressure. Mountain bikes have less pressure loss than road bikes because of the larger air volume. Mountain bike tires are less demanding on pressure rechecking. Checking the tire pressure of a mountain bike is sufficient once a week, which is not the case with a road bike, the tire pressure of which must be checked daily.

If you are heading for off-road “pokatushki”, then in this case, the optimal pressure will be in the range from 2.38 to 3.26 atmospheres

This pressure provides good traction, which is very important when driving off-road. good grip of the tire reduces the likelihood of falling off the bike

Therefore, it is strongly not recommended to pump the tire if you are aiming to drive a long off-road section. But do not forget about the possible consequences of an insufficiently inflated tire (for example, a pressure of 2.17 atmospheres. With such a tire pressure, an elementary collision with a stone is fraught with breaking the camera, as well as damage to the bicycle wheel rim.

Approximate values ​​by type of rubber

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

For slicks and semi-slick, the use of pressure below the maximum is allowed only in hot weather. a shortage by a quarter already negates the entire effect of such rubber, because it is “sharpened” for the maximum diameter and lack of resistance.

Classic cross-country treads with a width of 2-2.3 inches inflate to 3-4 BAR, depending on the track and habit, a lower value will make riding a strength training, and higher values ​​are simply not allowed by manufacturers, as they lead to a real “explosion” when peak load.

Extreme tires, whether downhill 2.3 wide tricky treads, or BMX stunt models should be inflated medium, between high and low to have sufficient traction, and then subtly varied for each trick or downhill.

Important Factors

Manufacturers indicate the recommended parameters on the side of the tire. Usually they are in the range of 35. 60 psi (2.38. 4.08 atmospheres). But still, this is a parameter that is selected purely individually. Therefore, there are a number of recommendations that are considered common to all people.

  • Due to the high pressure, the “roll” increases. the cyclist saves energy, and the rolling speed increases.
  • Excessive, as well as too little pressure in the wheels (both in the front and in the rear) of the bicycle can cause the rim to burst the chamber from the inside.
  • Low pressure prevents vehicle mechanisms from breakage when driving through holes, and also provides better “grip” with the surface when driving over rough terrain.

Important! With poorly inflated bicycle tires, the tire will move to the rim, wringing the tube. This will deform the wheel.

Methods for measuring pressure in a bicycle wheel

To measure the pressure in bicycle tires in the same way as, for example, in car tires, you can measure using a pressure gauge with an atmospheric scale and graduations. The pressure gauge can be purchased separately or in conjunction with a bicycle pump. Naturally, if you don’t have a pressure gauge at hand, the easiest way to check tire pressure is to feel the wheel with your fingers. However, even with the effort of your thumb, you may not feel the real pressure in the wheels of the bike. After just one atmosphere, the tire becomes quite tight, so you can be fooled by checking the tire pressure with your finger. In this case, the best solution would be to go to the nearest service station or gas station, where the presence of such a necessary device as a pressure gauge is mandatory.!

BikeHike Standard Pressure

Use the values ​​above when inflating tires. The manufacturer writes a range on the tire so that you can select the desired value for the road surface. The maximum indicated value is considered to be for a hard asphalt road. It is better to leave the minimum value if you will ride on a country road or in the forest.

If you drive with minimal pressure on asphalt, you will lose speed and have to work harder with your feet. On a dirt road, additional cushioning is needed, which is provided by low pressure. It also improves traction, which is an added benefit.

Types of bicycles and the correct tire pressure at 26 inches: table

There are different types of tires and bicycles. Recommended values ​​have been developed for each type, which have been tested by many cyclists.

For mountain tires designed for extreme sports, the pressure should be chosen experimentally. It is individual for each cyclist.

Cross Country tires are versatile, usually pumped up to 3-4 bar. They can be ridden in the countryside and on tough city roads.

Semi-slick tires are produced specifically for asphalt roads. Therefore, they must always be pumped up to the maximum amount. If inflated too little, the contact patch with the road will increase and it will be difficult to gain high speed.

These are the maximum values, the most important thing is not to exceed them so that the tire does not burst. It is better to keep the tire pressure of road bikes a few tenths of a bar below the maximum.

The most comfortable pressure should be in the wheels of a bike designed for mountainous terrain. It depends on the weight of the rider and the degree of roughness of the terrain. You also need to consider the width of the tires. The larger it is, the higher the pressure should be.

It is best to choose the value that is optimal for yourself in practice by rolling over the mountains with a pressure gauge.

Recommended bicycle tire pressure based on weight:

The tire pressure of a 26-inch bicycle depends on the person riding it.