Instagram only continues to grow in fame as it is already one of the most popular social media platforms. It comes as no surprise that it is now filled with digital marketers, and their plans and strategies that have been made for the New Year, 2022.
Flowers is one of the best things people think about when they wish to give their loved ones a gift. It can be used as a main gift or as a complementary one beside their gift. Flowers can be considered as a gift from nature and it comes in different sizes, shapes and colours which marks them as a great gift to present to your beloved.
Back in the day, people usually assumed that video games were bad for children, but that is no longer the case in this day and age. Just like everything else, too much gaming is not good, but spending some hours at the weekend playing games won’t do the kids any harm. It has even been proven that video games can improve people’s memory, hand-eye coordination, and spatial reasoning.
Alcoholism is a type of addiction wherein the person becomes physically dependent on alcohol in order to function normally. If you know someone whose drinking has crossed the line from social drinking into alcoholism, it can be difficult to figure out how to help them. The early warning signs of alcoholism are different for each individual, but there are still several commonalities.
Although the Presta and Schrader valves are the most used, there is a third (Woods or Dunlop valve) that is used in some Asian and European bicycle models. You can see both on these best mountain bikes under 500. In this article, you will find the main characteristics of each of them, their advantages, disadvantages and the most common uses.
Presta vs Schrader valve: Main differences
The Presta, or “French” valve, was expressly designed for use on bicycles. It has a smaller diameter in relation to the Schrader and Woods valves. This feature requires a smaller hole in the rim (7mm diameter), making it a better alternative for narrow wheels.
Its body is made entirely of metal and is generally fully threaded. It has a metal stem or pivot in the center, responsible for allowing air flow. The pivot is opened and closed by means of a crown or cylindrical nut in its upper part. This type of valve can be found in different lengths (40, 60, 80 mm) to use, depending on the profile of your ring.
To inflate a tire with a Presta valve, it is necessary to open the valve by turning the crown counterclockwise. At the end of the inflation process, it must be closed to prevent air from escaping.
This type of valve requires a special nozzle to inflate. If you do not have the necessary nozzle in your pump or inflator, you will require an adapter that allows you to inflate with an air pump or even in car service stations.
Presta to Schrader adapters
Today, most bike air pumps allow you to inflate Presta valve tires with no hassle, either through interchangeable nozzles, universal nozzles, or dual heads.
Advantages of Presta valves
- Facilitates inflation at high pressures
- They tend to have less pressure loss
- Weighs less than other types of valve
- Requires a smaller diameter hole, which improves the resistance of the rim
- Ideal for aerodynamic profile rims
Disadvantages of Presta valves
- It requires a special nozzle for inflation. However, any bicycle air pump already has it.
- Fragile pivot (howitzer or stem) that can bend or break if not used correctly.
Presta-type valves are common on mid to high-end bikes. Because they are narrower and lighter than the Schrader and Woods valves, it is not uncommon to find them on the road, track and other bikes with narrow rims. This type of valve is also the most common on tubeless rims.
Your first bike was probably equipped with a Schrader valve, also known as an “American” valve. This type of valve is wider than the Presta and with a uniform circumference throughout its entire body. The rings designed for this type of valve usually have a hole between 8.5 and 9 mm in diameter.
As in the previous case, its body is metallic and threaded. Oftentimes, the valve is rubber-lined, leaving enough thread uncovered to be able to put a cap on and hold the air pump nozzle. However, you can also find Schrader valves that lack rubber coating. It is possible to inflate these types of valves with the same pump that you use for a car tire, so it will be easy for you to inflate it even at gas stations.
Unlike the Presta, the Schrader works like a check valve. That is, it only allows air flow in one direction. The pivot or stem has a spring that keeps it in the closed position and opens with the flow of air from the inflator.
The nozzles used to inflate these types of valves have a structure in the center that pushes the pivot to allow air to enter. If you want to get air out of your tire, just press the valve pivot with a screwdriver or some other pointed tool that allows you to press the stem or pivot.
Advantages of Schrader valves
- Easy to inflate with almost any air pump
- You do not need extra accessories for inflation
- They are cheap
Disadvantages of Schrader valves
- Limited ring compatibility
- They tend to have greater air pressure loss
- Although not a general rule, it is possible for the valve body to decapitate from the chamber body
- Its body is shorter, so it can sag during inflation
Manufacturers generally install this type of valve in their low and mid-range models, as they are suitable for wide rings. There is a myth that Schrader valves are not suitable for high pressure. However, pneumatic telescopic seat posts and suspensions use this type of valve, with pressures between 200 and 300 PSI.
The use of the Woods valves, also known as Dunlop or “English” valves, is not as popular as the earlier types. They are currently used in certain models of bicycles in some Asian and European countries.
Its body thickness is very similar to that of the Schrader valve but with a narrow tip more similar to the French valve. Their average diameter is 7.7 mm, which allows them to be used in hoops with larger holes. To inflate a Woods valve, you will need the same nozzle as for Presta or alternatively, you can use an adapter.
Its internal pivot has a rubber seal or a small latex sleeve that prevents air from escaping. As you pump, the air pressure expands the seal and enters the chamber.
The seal or small latex sleeve may be damaged, which is why some patch kits include this type of replacement. Alternatively, the entire pivot can be replaced with ease.
Advantages of Dunlop valves
- Less pressure loss
- Easy to disassemble
- Simple removal of the pivot or stem
Disadvantages of Dunlop valves
- Found on old or rare bicycles
- If the latex that covers the inner part of the stem deteriorates, it will not work
- Less common in the market
It is generally found in urban-type bicycles of Asian manufacture and also in some European ones. It can also be found on some old bikes.
Compatibility between valve type and bicycle rim
Since the rings have outlet holes according to the type of valve for which they have been designed, the compatibility between the different types of valves has certain limitations.
For example, you will not be able to mount a Schrader valve tube on a Presta valve rim because it will not fit. However, in an emergency, you can still use a Presta valve tube on a Schrader valve wheel. In keeping with the above, a Presta bore rim can probably be used with a Woods valve tube, as long as its profile is low.
If you use tubeless rims, it is very important that the valve is the correct one for the rim you will be using. Although Presta valves are more common, it is possible to find Schrader-type tubeless kits.
The right pump for the valve type
As we have already mentioned, the vast majority of bicycle air pumps allow you to inflate any type of valve. In the simplest pumps, it is necessary to open the head and invert a small cylinder inside. Other more advanced pumps include dual heads, like the one shown in the image above, or have universal nozzles, which adapt to all types of valves.
In some portable pumps, there is another variant in which it is enough to place the hose in one direction or the other depending on the type of valve.
In short, we cannot say that one type of valve is better than another. The selection should be based on your needs, type of rim and rim that your bicycle uses.
For example, for someone who rides a bike in the city, whose tires do not require more than 50 PSI and low profile rims, the most practical may be the use of a Schrader valve. In this case, you have the benefit of being able to inflate your tires at any service station or gas station. Be careful. The issue of pressure is not a limitation of the type of valve. Rather gas station compressors do not have the ability to inflate a tire that requires 100 PSI.
With the above in mind, if your tires require high pressures (from 80 to 100 PSI, for example) and also your rims are narrow or with a high profile, the Presta valve may be a better option. In this case, it is best to inflate with a pump capable of generating the right pressure for your tires.
An average bicycle has about 252 parts, and although all are necessary, some, according to their functions, are more important than others. So if you are thinking of improving the bicycle that you use for daily transport, there are some components and parts in which it is advisable to invest to improve that bicycle.
It is not necessary to have the most expensive or lightest bicycle to pedal faster, much less to improve your riding experience. However, with a little cash in the right direction, you can significantly improve your asphalt rider experience during those trips you take on a daily basis on your bike, and the following suggestions have been chosen to do just that. Also, you might check out the best hardtail mountain bike under 1000. Improve your bike significantly at an affordable cost and thus pedal a better bike and increase your control and safety while riding.
How is a bicycle made up?
Most bicycles are made up of a specific and visible number of components which in turn are divided into what I will call systems and are as follows:
That includes the tires or tires, wheels or rims, rays, and masses.
Which is made up of the handlebar or handlebar; power; head tube; steering cups; scissors or hairpin.
Made up of all the pieces that transmit the movement that we generate from our legs -when pedaling- towards the rear wheel generally. It is made up of the bottom bracket or center axle, the chainrings or stars, and the connecting rods, pedals; string; pinion. But also, depending on the type of bicycle, it can include the gears, group, or speeds, which in turn is formed with the derailleurs, front and rear; the cassette or crown of pinions and the handles or levers with which you operate said changes.
There is more than one type of braking system for a bicycle: Caliper, cantilever, V-brake, hub, which in turn are divided into coaster brakes and drum brakes, disc brakes.
Its activation system may vary depending on the braking system and the bicycle, but generally, they are activated by activating the levers or levers as well. In some models, the pedals are used when activating them in the opposite direction to which allows you to advance. Each type of brake is ideal for a specific type of bicycle and offers a number of certain advantages and disadvantages.
Once we are more familiar with the components and parts that make up our bicycle, now we can know which components are most important to invest in them and thus make our bicycle an asphalt devouring machine. Well, as many of you know: the best bicycle is the one that best suits our needs. So adapting that bicycle by updating some of its components guarantees us the best vehicle to transport ourselves.
Without a doubt, the brake system is one of the most important components on our bicycle, and having good quality ones will make a difference that will increase the safety with which you move on your bicycle.
Personally, I like V- brakes -in any of their modes-, they are precise in their function, very reliable, super easy to adjust and you can find spare parts almost anywhere, but if your bike has any other type, Make sure that the quality of its manufacture is adequate.
What should I look for in good brakes?
But above all, that the mechanical operation of the same is precise, that is to say, that the crab or clamp that holds the rubbers or shoes makes its movement with precision in a fluid and continuous movement in both arms of the clamp.
Personally, I suggest you stay away from those Chinese or Indian cast iron generics – they are terrible but very cheap – since they do not want brake, although they do slow down thanks to friction with the rim, they do not really serve to brake a bicycle.
Regarding the tires or shoes, make sure that the rubber or material from which they are made is not very compact, that is to say, hard, since its grip on the rim will not be the most precise.
In relation to the levers or levers, avoid those that contain pieces and parts in their plastic structure, as this will reduce their useful life and even break easily.
Changes or speeds
With the changes, group or speeds -although they make up part of the transmission system- I mean specifically the system of speeds or gears that are made up of rear derailleur, two shift levers or levers (to drive chainrings and pinions), derailleur, chainrings or stars, cassette or crown of pinions.
And since the gears work to modify the amount of force that our legs apply during pedaling. Investing in quality ones will not only make it easier for you to climb slopes, but they will also save you a lot of money in maintenance since they are more precise and do not need constant adjustments -but they will need it from time to time because they are precision mechanical parts-.
What should I look for in good changes?
They must be precise and fast to change between one sprocket and another. They must not skip any step or speed, much less make noise during the march once the change has been made, if they did, or they are out of adjustment or are of poor quality.
Now, as the safest thing is that they will not allow you to mount them on your bike to test them, look for the finishes of the pieces to be well made and made with good materials – this will not be difficult for you to recognize-, as soon as you find pieces deficient will jump at sight. As for the derailleurs, the less plastic your parts have, the better.
It would also be very convenient that in relation to the bearings: center shafts, masses, steering cups, and other bearings, they are sealed, as this saves you money on their maintenance and they are better manufactured parts, accurate and with a longer useful life.
Having quality tires (tires) will make a big difference during your driving experience. Since equipping your bicycle with tires made with the best quality materials, not only can reduce the resistance on the rolling surface – making you faster – but also it will provide you with a better grip and will reduce the number of punctures that you can suffer while riding your bike -something that you appreciate when you go to work very neatly and you don’t want to get dirty to repair a puncture-.
Seat and grips
While this might seem more like an aesthetic add-on, its importance for accurate and comfortable driving is great. A good seat will make your rides more comfortable and will avoid possible chafing and injuries in the pelvic area.
Likewise, a quality grip will relieve your hands and wrists from discomfort, improving your experience while driving.
As we have seen, to have a bicycle that is mechanically superior to the common one, it is not necessary to spend a millionaire, with which we invest in those essential parts and components for better functioning of our bike will be more than enough.
The new year is nearly here – and hopefully we can all breathe a sigh of relief as we hope to have seen the worst of these strange times. We may have many things to be positive about in the future and plenty to look forward to.
It is impossible to choose one coat to suit all possible eventualities in life. Six essential coats, for all occasions, will keep you right, whatever the weather.
As winter sets in we always look forward to the festivities at this time of the year – the family gatherings and the Christmas parties, and thankfully it is looking like we will have a much more normal Christmas this year than we did last year.
Trees are essential to the world that we live in. They provide the air that we breathe, as well as homes and habitats for many different species of plants and animals all around the world – from the large pine forests of the colder regions, to the beautiful deciduous woodlands in the more temperate climates, to the rainforests of the hotter countries, trees are essential to all life on earth.