How To Determine The Size Of The Camera For A Bike

What are cycle cameras?

Let’s start with the basics. What are bike cameras? The bicycle tube is a ball-like structure that can be inflated and deflated using a valve. When inflated with air, the chamber fills the tires, giving you a comfortable and safe ride.

There are tubeless tires for bicycles, but most likely your bike has tires from a bicycle tube.

The bicycle tube is always matched to the size of the installed tire. There are quite a few wheels of different diameters on the market now, which can make it difficult for you to determine the correct tube size for your bike.

What kind of cycle cameras do I need for my bike?

Cycling cameras are manufactured in various sizes and with different types of nipples. These are two key factors to consider when choosing a bike camera.

Cycle tubes vary in size depending on the diameter and width of the tire:

  • Wheel diameter / circumference. Depending on the type of your bike: road, tourist, mountain or children’s. Wheel diameter / circumference may vary. Within THESE categories, there are different tire diameters, and therefore bicycle tubes: 26 inches, 27.5 inches, 28 inches, etc.
  • Width. Different widths are added to the variety of diameters. Thus, a narrower tube is used for road tires. Wider tires and tubes are used on mountain bikes.

By choosing the wrong diameter, you can get too long a camera, or be wrong in width, and the camera will not be able to fill the tires.

So how do you know what size you need?

There are two surefire ways to find out the correct tube size for your bike:

  • Check the sidewall of the tire. The best way is to look at the markings on the sidewall of your tire. On it you should see something like “700x23c” on a road bike, or “29×1.9” on a mountain bike. The first number in this sequence refers to the circumference of the wheel; the latter refers to the width of the tire. Additional markings on the tire sidewall may include ISO ETRTO size international standards. This will look like “23-622” for a 700x23c tire, or “50-559” for a 26 “x1.9” tire. Size ratio table of different specifications.
  • Check the instructions for your bike. Another way to determine the size of your tube and tire. View your bike‘s manual. Chances are you have NOT changed the specification since you originally bought the bike.

    How To Determine The Size Of The Camera For A Bike

Check the sidewalls of your tire to determine its size

Instructions for choosing a camera for a bicycle

Valve type. Schrader or Presta

The valve is used to inflate / deflate the bicycle tube. There are two main types of valves: Schrader and Presta. They are quite easy to identify visually.

Presta valves are narrower. Schrader valves are shorter and thicker (used on cars).

Presta valve. Left. Schrader valve. Business.

Benefits of latex cameras

Latex Cycling Cameras are an alternative to standard butyl rubber cameras which are common in the market.

The advantage of a latex tube is that it is lighter and more elastic, which can give a smoother ride feeling as it can respond better to changes in the road surface.

The disadvantage of latex chambers is that they allow more air to pass through than butyl ones, so you need to pump them up more often.

Latex tube can give increased bike performance

Tire pressure

On the sidewall of the tire, you can also find the recommended inflation pressure. It can be in Pounds Per Square Inch (PSI) or BAR (1 Bar = 14.5 PSI).

Weather conditions and riding style can affect how much pressure is needed in the chamber: on wet roads, the pressure is 10-15 PSI less than normal recommended to give extra grip, especially when cornering.

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Anti-puncture

Separately, it is worth talking about cameras with puncture protection. The only way to strengthen the chamber after release is to add a special substance to the inner cavity, when a wheel filling the space is punctured.

Anti-puncture cameras are a source of long-term controversy, and there are several arguments here: weight and cost are a minus, greater reliability is a plus. The opportunity to choose always remains with the buyer, and so far such cameras have NOT gained much popularity.

Of course, no serious puncture, even the highest quality sealant, will NOT fill, and you still have to change or render the camera, so many are NOT particularly interested in such innovations. Fortunately, the replacement is a fairly simple thing, and this article is explained clearly about it.

Dimensions

The diameter in each chamber must exactly match the wheel. In fact, no complications are lacking. You can find out the size of the tube on the marking on the tires. This will be metric (ISO) or inch size designations. At the same time, it is not easy to determine the size of the chamber after puncture. the marking is easily erased with use.

One rule of thumb regarding size is NEVER install a large camera. A smaller one is possible, since due to elasticity it will be less reliable, but it will fill the wheel space. For example, for transitional 28-inch wheels, the standard twenty-sixth chamber is often used to replace. The big one will just doubt and burst, “bit” itself after a few hundred meters.

Presta

One of the main types of sports (racing) nipples is the Presta design. In addition to the lightweight tube and cut along the entire length of the thread, this nipple gives access to the inner space of the chamber, which is necessary for additional processing and diagnostics. These nipples are commonly found on road bikes.

Dunlop

The nipple named after the tire maker is practically not supported by the modern industry. Not the most successful fastening on a metal ring to the main body of the camera and poor resistance to kinks led to the development of a number of replacements.

Nevertheless, the Dunlop nipple was used for a long time abroad and was supported until the beginning of the XXI century by Russian manufacturers. Used in all Soviet bicycles, both sports and mass.

Schroeder

The Schroeder nipple, which has many names for the companies that used it, we all know under the simple name “automobile”. Large enough and comfortable, reliable due to the rubber tube that isolates the rigid part from the main chamber, this nipple has become the de facto standard.

The only area where this nipple is still NOT recognized is lightweight sports wheels, where every gram counts and every element is sharpened to fit its purpose.

How to choose a good bike camera?

Perhaps many of us know what a bicycle camera is. Almost any bicycle wheel uses a camera, and this rubber torus, at first glance, can no longer hide any secrets. So, to begin with, the camera is an elastic torus (aka “donut”) that fits into the wheel rim and allows you to absorb small nervousness, do not transfer them to the rim. She is usually protected with a tire.

Material

The first chambers were made from rubber, made from natural rubber. Now it is not only expensive, but also completely unnecessary. Modern synthetic rubber is much more reliable, lighter and cheaper than its “natural” ancestor.

Butyl rubber is the name of modern rubber. It is produced in petrochemical plants and, with minor additives, is used in almost all areas of modern life. 99% of bicycle tubes are now made from butyl rubber.

Latex is a modern product made from natural rubber. It is very lightweight, reliable, resistant to physical damage, for example, the notorious “snake bite” (punching the camera rim in two places when hitting a sharp corner or too hard when landing). There are also disadvantages to the material. Extremely high cost and rather low resistance to wear. You can’t ride on such a camera for a long time, so latex cameras are chosen by athletes, not ordinary riders.

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Nipples

There are always flaws in ideal figures, and in the cells it is, of course, a nipple. Air must enter through something into the chamber when inflating, and for this (though not for bicycles) a special mechanism was developed. a nipple. The nipple is a tube and a non-return air valve, the main thing is its size.

The size depends on what hole is needed for the nipple in the rim, and how the bicycle tube will be inflated: what pump and at what speed.

Now in the industry there are several standards, which in a certain way compete with each other. Modern unification has led to the fact that the type of nipple is determined by the field of application. Road and sports bikes are still equipped with their more bike-friendly Presta nipple, and mass and mountain models with automobile.

Camera history

Bicycle tubes appeared at the end of the 19th century and did NOT immediately take on their present form, remaining one with the tire. In the 20s of the XX century, a wheel of modern design appeared. with a separate chamber, which could be replaced separately from the tire. By the way, the first prototype appeared on a bicycle, and it was made by the still well-known John Dunlop for his son’s bicycle.

Throughout the twentieth century, bicycle, motorcycle and car cameras went hand in hand, and it was only after the advent of mountain bikes that it was finally clear that bicycle cameras were special. Fight for every gram of weight, increased vulnerability due to small touch sizes, special requirements for dynamics. in recent decades, more and more non-standard cameras have been made, and it is no longer so easy to find the right one. For example, elastic latex cameras appeared, specialized bicycle nipples were developed, a whole layer of innovations appeared, unique for bicycle cameras and completely inapplicable in “big” technology.

Compatibility

  • Camera with Dunlop nipple can be easily installed on rim with Schrader hole without any additional manipulations.
  • Dunlop and Presta have the same end thread, so their caps and pumps are always compatible.
  • Nearly all bike pumps are Schrader and Presta compatible.
  • By means of the adapter nut it is possible to use auto pumps under Schrader with Dunlop and Presta nipples.
  • There are special plastic liners for mounting bicycle tubes with a Presta nipple in a rim with a Schrader hole.
  • A rim with an inner width of 17 mm for the Presta nipple can be reamed with a Schrader 8 mm drill, with further processing of the edges of the hole with a round file.

Dunlop

Dunlop is a traditional nipple referred to as DV (Dunlop Valve). He must be remembered by someone who had an old Soviet bicycle. Even in spite of its dilapidation, it, nevertheless, is still quite common in the world, but it is practically NOT found on real bicycles. Installed only on children’s and road bikes. The Dunlop nipple has a diameter of 8 mm, but it can also be inflated with a pump for Presta.

Installation of a chamber with such a valve is rather inconvenient, because first it is necessary to unscrew the valve cap, then thread the valve into the hole, and only after reinstalling the cap can the chamber be pumped. What can we say about checking the tire pressure! In the DV nipple it was previously impossible, but today there is a solution in the form of a special valve from Schwalbe, which allows air to be vented, thanks to which Using the AIRMAX indicator, now it is possible to check the pressure in the tire.

If the valve begins to let air into the Dunlop nipple, then in this case it is necessary to replace the small rubber tube in it, which covers the inside of the valve. This tube is a consumable, therefore it is included with some repair kits. To replace it, you need to slightly wet the metal part of the valve and put it on until it stops, gradually scrolling it.

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Nipples

There are always flaws in ideal figures, and in the cells it is, of course, a nipple. Air must enter through something into the chamber when inflating, and for this (though not for bicycles) a special mechanism was developed. a nipple. The nipple is a tube and a non-return air valve, the main thing is its size.

The size depends on what hole is needed for the nipple in the rim, and how the bicycle tube will be inflated: what pump and at what speed.

Now in the industry there are several standards, which in a certain way compete with each other. Modern unification has led to the fact that the type of nipple is determined by the field of application. Road and sports bikes are still equipped with their more bike-friendly Presta nipple, and mass and mountain models with automobile.

Maxxis downhill

The most reliable, so to speak, “bullet-proof” bicycle camera, the use of which is focused, first of all, in the most extreme and terrain conditions by downhillers. The wall thickness of the chamber is 1.5 mm, weight is 465 grams, which maximizes the confident and stable movement during downhill. The Maxxis Downhill can also be used with reduced pressure. It does not even speak of resistance to breakdown here, because K. This camera is simply equal!

Conclusion

Cycling cameras were introduced over 100 years ago and have become a standard feature on the bike. Almost all chambers are made of synthetic rubber, some are reinforced with a special sealant for puncture protection. Changing the camera is easy, although it is best not to do it often. Different chambers have different sizes and types of nipples, you should treat them with care.

Maxxis freeride

A camera with an increased wall thickness of up to 1.2 mm is recommended for extreme skiing enthusiasts, as. Designed for fairly high loads. The Maxxis Freeride can be fitted in tires ranging from 2.2 to 2.5 inches. Here, no weight reduction is even out of the question, because all cameras weigh 292 grams, this is with the Presta nipple. Also available with Shrader nipple.

Maxxis Welter Weight

The simplest bike camera that will fit most buyers. The wall thickness is 0.9 mm, which is undoubtedly the best compromise between puncture resistance and weight. This camera model has the widest range of sizes for almost any type of bicycle. from 20 to 29 inches, and is also available with a 45 and 60 mm nipple (Presta, Shrader).

Maxxis Ultra Light

These cameras have been specially designed for bicycles that take part in competitions and therefore have a lower wheel weight compared to urban, walking and extreme counterparts. Due to the reduction of the chamber wall to 0.6 mm, it became lighter by more than 20% without loss of strength. The Ultra Light model is not produced in such a rich assortment, because K. Weight reduction is only relevant for a limited range of bicycles, but nevertheless, this range will be quite enough for various tires.

Materials for making bicycle cameras

There are two main materials used in modern bicycle cameras:

  • Latex is a material used for the production of racing cameras, the main parameters of which are light weight and low energy loss (to the detriment of other characteristics). Latex chambers are made on the basis of natural rubber. Advantages: high elasticity and resistance to “snake bites”.
  • Butyl rubber is a purely synthetic rubber that is widely used in the manufacture of cameras designed for everyday use. Advantages: low cost, high wear resistance, good air retention.