What is the pressure in the bicycle fork

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.

pressure, bicycle, fork

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 such a pump to always be at your fingertips, 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.

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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.

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

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.

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.

BIKE TIRE PRESSURE 26” (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 pressure in the tires of the bicycle 26”, 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 mass: 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 as the grip 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 considered.

That’s it, the main points to pay attention to are described above. But keep in mind that it is not so easy to find the ideal tire pressure for yourself, so we take a pump with a pressure gauge and select the very ideal pressure.

What pressure should be in bicycle tires

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 tire pressure. Now a little more detail.

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If you ride on semi-slick tires, then at low pressure these tires lose their benefits.

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.

However, if you want to carry out 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 feel free to acquire it. Consider, in general terms, a fairly good average price pump.

Most often, this is a fairly neat pump. externally similar 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 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.

No pressure drop is observed when the valve is screwed on. 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.

BIKE TIRE PRESSURE 26” (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 pressure in the tires of the bicycle 26”, 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 mass: 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 as the grip 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 likely to be prone to a more aggressive driving style, therefore, 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 considered.

That’s it, the main points to pay attention to are described above. But keep in mind that it is not so easy to find the ideal tire pressure for yourself, so we take a pump with a pressure gauge and select the very ideal pressure.

What should be the pressure in the tires of your bike?

Oddly enough, the comfort and convenience of cycling is highly dependent on the pressure in the tires. If a wheel is poorly inflated, it impairs handling, slows down the ride speed, requires more effort from the cyclist and is easy to puncture. Pumping the wheel will reduce comfort (in the case of rough terrain) and will also increase tube wear. You can find a middle ground if you have certain knowledge and experience in cycling.

Optimal tire pressure. this is an individual parameter and for each person it can be different. It depends on the riding style, on the surface that the route will pass through (rough terrain or flat road) and also on the skills of the cyclist himself. But there are still pressure limits that are worth considering and which we will consider further.

When inflating the wheels, take into account: the more pressure, the better the roll. and, as a result, economy of the cyclist’s energy; very high pressure can lead to breakdown of the chamber against the inner wall of the rim; excessively low pressure can also lead to breakdown; low pressure reduces the load on the mechanisms (and, accordingly, reduces the risk of damage) when driving on various irregularities; low pressure improves grip and makes it easier to ride on rough terrain.

Taking into account the above, we can conclude that the wheels should be inflated so that they provide good grip on the road surface and at the same time do not lead to a breakdown of the chamber. For this, standards for permissible pressure are provided.

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Information on the tire In order not to be mistaken when choosing the optimal pressure, it is enough to look at the tire. Next to the tire size information, the range of permissible chamber pressure will also be indicated. Some may wonder why this information is not indicated on the camera itself. The fact is that it is the tire that takes the main load when inflating the wheels, and indeed when driving, therefore the maximum and minimum pressure in the wheel depends only on its capabilities. In the chamber, the nipple is the main vulnerability, but it is usually well sealed and protected.

Now let’s look at the units of measure for pressure:

Psi. pound-force per square inch; Bar. bars, usually equated to measurement in atmospheres; Pa. pascal.

The relationship between pressure units is as follows: 1 Bar = 100,000 Pa = 14.504 Psi.

If you have a mountain bike and it is difficult for you to decide what pressure is right for you, then at first you can use a special table:

Cyclist weight (Kg) Pressure (BAR) Pressure (Psi)
fifty 2.38-2.59 35-38
63 2.52-2.72 37-40
77 2.72-2.93 40-43
91 2.86-3.06 42-45
105 3.06-3.27 45-48
118 3.2-3.4 47-50

The pressure in the wheels of road bikes should be significantly higher, it varies between 6.5. 9 atmospheres (up to 130 Psi). The maximum value will be indicated on the tire itself.

It is also worth taking into account the air temperature outside: on hot sunny days, the air in the chamber heats up and, accordingly, expands, increasing the pressure in the tire, on cold days, it’s just the opposite. the pressure drops and it is necessary to pump up the wheels a little more than the standard value for you.

Bicycle wheel pressure. this is a very important parameter, which determines not only the level of comfort while riding, but also the service life of important bicycle components. Therefore, always make sure that the wheels of your bike are in good working order and inflated to the optimal level, taking into account the previously listed factors.

About Mountain Biking. Adjusting the Suspension Fork

Long-term passion for any hobby leads to an indispensable investment in it. The bicycle is no exception. Suspension forks on inexpensive models have few differences, but if you wanted something better and even had a chance to buy it better, then it’s time to take a closer look at this issue. You can start reading the instructions (which, by the way, is not bad and will be a big plus), but few have the strength (or desire) to read the fifty-page manual to the end.

Correct fork alignment affects further ride comfort on rough terrain and asphalt. The wrong setting can make driving torture. To begin with, it is worth noting that there are air and spring forks. In the first case, the stiffness of the shock absorber is regulated by air pressure, in the second it depends on a metal spring.

Tuning the Fork to the Weight One of the most important tuning options for the fork is fitting the rider to the appropriate weight. As for the spring forks, everything is complicated here, since factories produce them based on the average rider, weighing 75-85 kilograms (nevertheless, for good forks there are springs of different softness and there is a preload adjustment).

The situation is twofold: the heavier the cyclist, the more pressure will be on the spring, respectively, it sags more, and the risk of its breaking through on some hard area increases. In another case, when the weight of the cyclist is too small, the shock absorption is of poor quality, because this weight is not enough to overcome the resistance of the spring on various kinds of irregularities.

With a large weight, the preload adjustment (aka Preload) is very valuable, which increases the rigidity (twisting) of the spring with mechanical stops. Small irregularities are handled somewhat worse, but the chance of breaking through the shock absorber is noticeably less. So spring mechanics will stop responding to small irregularities of the earth’s surface. Already tired of reading? You can discard all the troubles, but then what is the point of buying a better quality part? So let’s continue.

A more versatile solution: air plugs that can be adjusted to almost any weight using a high pressure pump (often included). Buy it separately, however, is also not difficult.

You can try to pump the plug with an ordinary pump (after all, the nipple is usually automobile), if you have a lot of free time and effort (but there is no guarantee that the result will be achieved). High pressure pumps are equipped with a winding hose and a special pressure relief button.

What pressure should be in the fork Either in the instructions, or on one of the legs of the fork, there is a table of the ratio of fork pressure to the rider’s weight. It should be guided by, adjusted for your own feelings. Many people prefer to inflate the plug to a higher pressure than what is indicated in the table. So it is more difficult to punch and, probably, it will be worse for handling small irregularities. Therefore, it is necessary to milk sag at 15-20% of the suspension travel. For example, if the fork has a stroke of 100 mm, then, accordingly, 15-20 mm goes to the sag.

Sag is the difference between the fork travel of an unloaded and loaded bike. In human terms, the sag is the sinking of the fork after the owner sits on the bike. In order: the plug should be inflated to the pressure indicated in the table. Once the target pressure has been reached, it’s time to sit on the saddle. The rubber ring on one of her legs will help to understand which sag is on the fork. If there is no such ring, you can make it yourself from scrap materials.

An insufficient sag value will cause your hands to feel uncomfortable on small irregularities. the fork will not handle them. And if you overdo it with the sag, then this situation can end with a breakdown of the front shock absorber, which also does not bode well.

Negative Spring Needed in a Bike Fork It seems to be pretty straightforward and there should be enough compressed air for the fork to work effectively. But, oddly enough, in the operation of this system, one repulsive force is not enough, since a compressive force is also needed, in opposition to the first.

The usual average rider weight simply isn’t enough to force the fork to react to the roughness of the road, and this is what caused the negative spring to be installed. Its function is precisely so that the fork can react to minor irregularities, helping to trigger. The mechanism described above comes in several variations: a metal spring or a separate air chamber.

Dual or Solo Air Most good forks are made with Solo Air technology with the same pressure in both chambers. According to this technology, several chambers are pumped simultaneously through one installed nipple, which has nothing to do with Dual Air technology, with which it becomes possible to adjust the negative spring.

The Dual Air system is quite difficult for many beginners, as they, especially without understanding the plug device, do not understand what’s what. Dual Air, frankly, is mainly required by athletes who care about seconds. In simple driving, there is no need for such a design. What’s more, the plug will only take longer to set up.

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Adjusting Fork Rebound An important basic function of every working suspension fork is Rebound. If the oil damper was absent, then the spring would bounce back in an instant, and then immediately compressed, beating off the hands. In conventional forks, the rebound force can be adjusted with a special adjustment (plus and minus are usually drawn on the lid). It will be useful for beginners to find an area with bumps and drive along it. Adjust the rebound depending on the sensations and remember the position.

You can do this in several stages: drive with the existing setting. Then, if the rebound is not the fastest, do it and drive again along the selected segment. If it’s too fast and your hands are extremely uncomfortable, then turn the adjustment by 1/4 and repeat. The purpose of all of the above is to find the moment when the fork not only does not knock out hands on the rebound, but there is no delay from the oil damper.

Twisting the rebound to the maximum will trigger the fork with a delay that is quite noticeable. As a result, on a series of repetitive irregularities, each fork simply won’t have time to work out. The elastomer acts as a damper in cheap forks. Subzero temperatures cause it to harden and it can easily stop functioning.

By the way, it will be useful to mention that there is a platform. a technology that prevents unnecessary buildup of shock absorbers. It is installed in more expensive forks and therefore, the number of settings in them also differs in a larger direction (high and low speed compression, high and low speed rebound).

Fork blocking But back to our rams, as they say. Quite a few manufacturers already offer blocking on the forks of the mid-price segment. This is an incredibly handy add-on! Just imagine: on the asphalt you can get an analog of a rigid fork by simply moving the lever to the locked position. If we consider individual models, then on them the fork lock is completely turned on remotely, using a lever on the steering wheel.

Experimenting more with your new fork is the key to having it set up correctly and riding comfortably. You do not need to be afraid of this, rather, on the contrary, try to find the best option for yourself.

High pressure bicycle pump selection

A high pressure pump is needed to inflate the bike’s air shock absorbers. It applies to both forks and rear suspension. It is an essential accessory for athletes, cyclists and extreme lovers. With it, you can always adjust the stiffness of your suspension for a specific track.

Maximum pressure

Different forks work with different pressures. The negative and positive chambers are pumped differently. Finally, rear air shocks require much more pressure than forks. It is important to choose a pump that will be comfortable to work in the range you need.

It is not only the type of fork that plays a role here, but also the rider’s weight, riding style, preferences and type of track. The more you weigh, the more pressure needs to be pumped into the shock absorbers. For a comfortable ride on rough terrain at high speeds (downhill), you need a little less pressure than for extreme jumps from high heights or ditches.

This is why it is so important to always carry your fork pump with you. If you arrive on the track and see a large number of difficult areas with stones and tree roots, the shock absorber should be slightly lowered. If the track is smoother and faster, the increased fork stiffness will work in your favor.

Why you can’t use a conventional hand pump?

If you take a closer look, you will notice that the nipple on the air shock absorbers is exactly the same as on the bicycle wheel tubes. This is a Schroeder nipple. It is also used in cars and motorcycles. Therefore, you will be able to connect your pump to the bike fork.

But you will not be able to pump up the shock absorber. At best, you simply cannot do anything. At worst, bleed any remaining air from the plug. It will no longer be possible to ride with the fork fully deflated. you will break it immediately. This will happen because the valve of a conventional pump is not designed to work with such pressure, and can allow air to pass through itself.

In addition, the valve of not every pump can reach the forked nipple. Often, valves on hand and foot pumps are equipped with a lever that can be used to easily connect and disconnect the valve. In forks, the nipple can be slightly recessed into the body, and then the lever will interfere.

But this does not mean that the high pressure pump is universal and can be used for anything. In theory, you can of course inflate your bike wheel with it. But this can take 10-15 minutes. the air chamber pumps air in very small portions. Still, the volume of the chamber at the wheel (especially on bicycles for freeriding or downhill) is significantly larger than that of a shock absorber.

Differences from a conventional pump

Although a high pressure pump performs the same function as a conventional pump, its design is slightly different:

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  • Small volume of the air chamber. such a pump pumps much smaller volumes of air than a conventional one.
  • Robust metal housing. essential for high pressure applications.
  • High-quality pressure gauge. for the most accurate inflation of shock absorbers.
  • A special valve with a thread. so as not to release the pumped air when disconnected from the nipple.
  • Possibility of controlled air release. a button with which you can release part of the air from the chamber in order to achieve optimal pressure.

Despite all the external similarities, these are two completely different devices designed to perform different tasks.

Nipple type

Not all bicycle forks use a Schroeder nipple. Some manufacturers, such as Marzocchi or Rock Shox, may equip their forks with custom nipples. In this case, it is important to choose a pump with an appropriate valve or (the best option) a set of different adapters.

High pressure pump selection

There is no particular difference in the design of the high pressure bicycle pumps. They are all very similar and apply for similar purposes. However, there are 3 features that determine which model is right for you.

Pressure gauge scale

Suppose you need to pump up to 90 psi for optimal trail riding. It will be much more convenient to do this with a pressure gauge, the scale of which is marked down to 100 psi. A 300 psi pressure gauge will no longer be able to provide this. Therefore, when choosing a pump, you should pay attention to such trifles. After all, the more accurately the plug is tuned, the better it will work.