How Much Should The Bicycle Wheel Be Inflated

How Much Should The Bicycle Wheel Be Inflated

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 pressure, hits the wheel with everything he can and the camera and tire explode in a matter of seconds.

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

If the pressure is low, then the tire can easily break through. In addition, under-pumped 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 breakdowns located side by side. Occurs with a sharp hit on a curb, stone or bump. In this case, the tire is pressed against the rim, the camera is clamped between the rim and the object that 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 “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.

Moreover, if the wheel is heavily 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 so that the ends of the spokes and the sharp edges of the spoke holes pierce 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 every ride (at least by touch). Remember, it’s not just the nipple that poisons. 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 another 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%.

Pressure effect

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

Here are the main factors to consider when choosing an inflation level:

  • High pressure gives “rolling”. rolling speed, to save the cyclist’s strength;
  • 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 the rim on an obstacle or bump punches 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.
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Taking into account all the pros and cons, a single recommendation can be drawn: the wheels must be inflated enough to provide good traction and do not damage the camera. For this, there are standards for what pressure is considered acceptable. We will consider them further.

Now in the influence of the ambient temperature on the pressure. What pressure should be in the bicycle tires (how many atmospheres)

In this article, we will answer the question that many cyclists are asking: what 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 permissible values ​​for the tires. All products, regardless of the manufacturer, shall 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 the weight of a person, 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 correctly determine the pressure in the wheels. Be careful when using compressor pumps, as They deliver large amounts of air at high speed, which can cause the chamber to explode.

The pressure in the tires of the BICYCLE, what should be and WHAT TO RUN?

Every bike lover is obliged to keep an eye on the condition of your 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 extinguish 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 will help you find the middle ground.

Many are accustomed to checking the pressure in Dedovsk tires using the finger method. However, this method is very imprecise, and besides, the concept of “well-inflated wheel” can be very different for every BIKE. That is why it is better to always have a pressure gauge on hand to accurately determine the tire pressure.

Its cost is quite low, so everyone can afford such an acquisition.

What keeps the pressure in the wheel

You need to understand that the pressure is not held by the camera, but by the tire.

Standard pressure

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

  • An unknown tire without markings was purchased;
  • Comments on physical access to the bike;
  • The marking is incomprehensible, the numbers are marked in unknown units.

Mountain bike table:

Influence of pressure on ride quality

The correct tire pressure is a specific parameter for each bicycle and for its rubber. The bike owner creates a certain amount of pressure based on the quality of the roads where he rides, or lack thereof. Not the least role is played by preferences when driving and physical training. The minimum and maximum pressure is determined by the supplier of the specific rubber.

The increased pressure in the wheels allows the cyclist to save energy. By improving the movement of the wheels, a person can lengthen or complicate his route.

The pressure exceeding the limit set by the manufacturer is the reason for the puncture of the chamber from the inside of the rim. The side of the rim where the spokes go and where the protective rubber tape runs will eventually break through the chamber with one of its side edges.

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Below the lower limit pressure will result in chamber breakdown, or “snakebite”. It looks like two holes located side by side. The rim breaks through the camera in two places at once when the wheel hits an obstacle.

Wheels Must be inflated within the manufacturer’s specified pressure. In this case, the tire adheres perfectly to the road surface or to the road without any surface. The camera remains intact for many hundreds of kilometers.

The chamber pressure range is indicated on the sidewall of the tire. For example, mountain bike tires are labeled 1.95 inches wide. Inflate the wheel and measure the width of the tire using a ruler and two squares or a caliper. If the width matches the specified value, and the wheel feels elastic and hard, then you can ride. The width of the inflated wheel is not indicated on the camera. in this example, without a tire, it can inflate not to 1.95, but, say, to 2.1. When the camera already “sits” under the tire, the nipple itself takes on the load from the air expanding it from the inside.

The valve of the nipple. the spool. is reliable enough not to bleed air when the wheel of a stationary bicycle is inflated or when it is under working load during the ride. The pressure rating while driving is already taken over by the tire, not the chamber. The tire does NOT allow the tube to swell further. The tube is securely held by the tire due to the shape given to all rubber by the cord and the bead cable.

If the pressure is too low, the bike tire will sink under the weight of the cyclist. It clogs the camera, causing it to abrade, making it more penetrable. Excessive pressure at high speed will tear the rubber when hitting a bump, stone, rails or crack across the road, when driving on overheated asphalt.

Now in the influence of ambient temperature on pressure. 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 the only point in it that is 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 high, it may just burst on one of the bumps or when driving on hot asphalt.

Pressure dependence on the type of surface and type of tire

Half slick

For semi-slickers, it is important to choose the right pressure for the very surface on which the bike rides.

Driving on a hard surface. asphalt and rolled primer. At low pressure, all the benefits of THESE tires are lost. A properly inflated half slick should roll on a hard surface with a smooth part of the tread. And on soft ground, side lugs are included in the work. At low pressure, the tire will flatten and grip the hard surface with the side lugs, creating additional resistance and wearing out faster.

When driving on soft ground, it is better to reduce the pressure. The low pressure cushions bumps in the road and makes off-road driving more comfortable. In this case, the contact area of ​​the wheel with the road increases, which, accordingly, leads to an improvement in grip. This is especially felt on descents and sharp turns.

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When riding on sand or snow, it is better to increase the pressure. it will improve grip and improve bike handling.

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 pressure, hits the wheel with everything he can and the camera and tire explode in a matter of seconds.

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

If the pressure is low, then the tire can easily break through. In addition, under-pumped 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 breakdowns located side by side. Occurs with a sharp hit on a curb, stone or bump. In this case, the tire is pressed against the rim, the camera is clamped between the rim and the object that 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 “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.

Moreover, if the wheel is heavily 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 so that the ends of the spokes and the sharp edges of the spoke holes pierce 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 every ride (at least by touch). Remember, it’s not just the nipple that poisons. 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 another 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%.

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.

Bicycle tire pressure versus cyclist weight

This should immediately clarify. 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 on mountain bikes is always lower.

Here is a table showing the dependence of the pressure in the wheels of mountain and city bikes 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%.

Tire pressure directly affects tire durability. Riding on badly inflated tires wears them out quickly.

In the pressure in the bicycle chamber