Monday, November 27, 2023

20 Inch Tire Size Chart

Tire Size Chart Width Of The Tire

Tire Sizes Explained!

The width of the tire is shown in mm . In the example above, the number 195 can be seen. This means that the tire is 195 mm wide. The width of the tire can vary from 125 mm to 335 mm. The width always goes in steps of 10 mm. Tire sizes range from 125-135-145-155-165-175-185-195-205-215-225-235, etc. The tire width of the average middle class car is 205 mm wide.

Tire Size Chart Rim Size

The rim size is the size of the rim around which the tire fits exactly. This is the inner size of the car tire and the outer size of the rim. Rim size is almost always given in inches. The unit of measure Inches is widely used in English-speaking countries and is indicated by the symbol which we see as a quotation mark. One inch equals 2.54 cm.

Smaller cars are more likely to have a smaller rim size than larger cars. A larger rim fits wider tires which are necessary for better road holding and can also handle a higher weight. Nowadays, cars are increasingly equipped with larger rims because this is not only more beautiful and sporty, but also because the tires are more common, which makes them cheaper. There used to be a lot of cars driving around with 13 inches and 14 inches. Today that is 15 inches, 16 inches 17 inches.

Tire Info And Size Chart

Weve found that most people are aiming to improve the look, stance and performance of their ride when they are buying wheels, which usually means they are also selecting new tire sizes.

Wed like to help with some basic tire tips and a size chart that shows approximate measurements, in inches, of some popular tire sizes commonly used by our customers.

Many know what diameter wheels they want to run and are hoping to run large diameter wheels for looks and for big brake clearance but dont want the overall tire diameter to grow as much as the wheel diameter. We hope this chart makes it easier to find the desired tire sizes by showing the overall tire dimensions, in inches, of these popular metric sizes.

If your car requires something unique, start with picking the tire for the end of the car that is the most difficult.

If youve mini-tubbed the rear for example, and are going to run a big tire with less brand/tread/size choices, start by figuring out that size and what your options are. Then see if the those tire manufacturers also make a matching tire for your front.

Weve included the sidewall height of the tire as a quick way to make sure your front tire doesnt have a taller sidewall than your rear tire when doing staggered sizes. Thats usually not a good look.

For grip and even wear the wheel width needs to allow for a good contact patch where the tread meets the pavement.

Budnik Tire Chart

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How To Read Tire Size

  • Maintaining Your Vehicle

Installing the right tires on your vehicle is essential to the overall performance and safety of your vehicle. Your tire choice should reflect the conditions in which you drive and your preferences for vehicle response and handling. To make the most informed decision, though, you must understand how to read tire size when it’s time to buy tires.

Thankfully, determining the correct tire size for your vehicle is relatively simple. All the information you need is immediately available either in your owner’s manual or somewhere on the vehicle itself. Already know how to read tire size numbers? Skip the explanation and find the right Bridgestone tire for your vehicle online or by visiting a Bridgestone tire dealer near you.

While actual, physical measurements like width and diameter are factors in finding the right tire size, there are additional details to consider. Knowing how to read car tire sizes also means understanding terms like load index and speed rating that affect your vehicle’s overall capabilities.

Which Size Tire Fits Which Bicycle

tires Comparison Chart

To determine which tire size will fit, perform measurements on the bicycle’s fork and frame.

If the bicycle has rim brakes, the rim must line up with the brake shoes and so only one rim size or a small range of sizes will work. So, first measure the distance from where the center of the hub axle would be in a dropout to the center of a brake shoe. Then look up the rim radius in the ISO table on this page. A different rim size may be possible with different brakes, though longer brake reach generally results in poorer brake performance.

The front tire must not reach the fork crown the rear tire must not reach the seatstay bridge or chainstay bridge. Take measurements from the axle position to the fork crown, chainstay bridge and seatstay bridge. Tire outside radius is nominally the rim radius plus the tire width, and as much as 1 cm greater for a tire with a deep tread. A tire must have typically 1 cm clearance, 2 cm if a fender will be installed, but do not use a wheel that is much smaller, or a pedal is too likely to strike the ground in cornering. On a bicycle with horizontal dropouts, additional clearance to the chainstay bridge is desirable so the wheel can be removed without deflating the tire.

If the bicycle has hub brakes , different rim sizes are possible as long as the tire is fits the frame. A larger rim goes with a skinnier tire, and vice versa..

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From The Wtb Website:

The GMS uses a two-number system: the first number is the width of the casing, and the second number is the width of the tread, both in millimeters. These measurements are taken on a rim which is 20 mm wide at the bead-capturing point, with a tire inflated to 60psi and maintained for 24 hours.

In addition to being able accurately to size a tire, knowing the actual casing size and tread width provides an indication of air volume, tread characteristics and tread contact area all of which provide you with a more concise idea of what ride characteristics to expect from each of WTB’s tires.

Where To Find Your Rim Diameter:

Your sidewall should look similar to one of the two options shown. The highlighted number represents your rim diameter.

Below you’ll find a selection of some of our more common tire sizes for passenger cars, light trucks and high flotation tires. To see our full inventory of tire sizes, including for applications like trailer tires, please visit our tire finder.

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Tires Sizing And Running Direction

The direction of tire rotation: What is independent of the tire size is the direction of rotation. Some tires have an arrow on the side of the tire. This arrow indicates the direction of rotation / running direction of the tire. The arrow must always point towards the front of the car. Tires with a V profile have at least an arrow and therefore also a running direction. Pay attention to this when mounting the tire or when changing a wheel. The steering and driving behavior can be directly influenced by incorrect mounting.

Tire Size Chart Tire Type

How To Read Tire Sizes | Truck Accessories Explained

The tire type is in almost all cases indicated with the letter R. R stands for Radial. Radial explains how the tire was made. With a Radial tire, steel cord plies are applied perpendicular to the direction of rotation, so in the width of the tire. This makes the tire very flexible and maintains contact with the road surface when cornering. The counterpart of the Radial tire is the Diagonal tire. With the Diagonal band, the cord layers are placed diagonally over the band.

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How To Find The Height Of 20 Inch Tires

You can find the height of your tires in the same series of numbers as the width, found either on the inside of your driver’s side door or on the sidewalls of your current tires. In the example P245/50 R20, the number directly after the / refers to the height of your tires, which means the height would be 50.The aspect ratio is given as a percentage of the tire’s width. In the example above, the 20-inch tires would be 50% as high as they are wide. 50% of 235mm is 122.5mm. Converted to inches, the height of this 20-inch tire is 4.82 inches. The height is measured from the wheel rim to the top of the tread.

How To Convert 115 70r14 To Inches

First of all, we need to divide 115 mm by 25.4 , which will give us a width of 4.5. Then, 70% of the 4.5 will result in 3.2 sidewall.

To get the total height or tire diameter, we need to sum the 14 rim diameter with two of the sidewall heights. It will result in a 20.4 total tire diameter .

For your convenience, below is a table for 115/70R14 conversion to inches:


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Bike Tire Size Chart And Sizing Guide

Do you often find the need to keep changing your bike tires now and then maybe from the wrong choice of the wheel size or the rim size? Lets offer some help! The wrong bike tire size can be a menace especially when it comes to speed and efficiency! Getting the perfect size bike tire is not as easy as it seems, but worry not, we got you!

A bike tire size chart is a useful resource because you really want to buy the correct bicycle tire sizes. In this article, we will cover the various size specifications on bicycle wheels and how to measure them.

A Bit Of History And Math

20 Inch Rims: Tire Size Chart For 20 Inch Rims

The cross-section of a tire’s fabric is an arc of a circle — only a full circle with tubulars. The rim takes up the part of the circle that is not represented by the tire.

The rim is typically 0.7 times as wide as the tire, and a bit of trigonometry will get you that the rim occupies about 90 degrees of what would be the circumference of the circle.Ã The tire occupies the other 270 degrees and so the width when mounted on the rim is 4/, about 0.4, times the width when laid out flat.

Rim and tire widths of course vary, so this result is not exact.

A suggestion to measure tire width with the tire laid out flat first appeared in the third edition of Sutherland’s Handbook for Bicycle Mechanics , and I was the author of that suggestion.

That edition also included the first published tire-size chart using the ETRTO marking standard, other than in the original ETRTO technical document. I performed the calculations for the chart on a Hewlett-Packard Model 27 pocket calculator.

–John Allen

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Where To Find A Car Tire Size

No matter what vehicle you drive, finding the manufacturer-recommended tire size should be easy. The best place to start looking is the owner’s manual.

Don’t worry if you can’t locate the manual you may also find a tire fit guide in these locations:

  • The driver’s side door jamb
  • Inside your glove box door
  • Within your gas tank hatch

You can also find tire size data on the sidewall of your current tires . However, no matter where you find your tire size, you will have to decipher a sequence of numbers and letters. Don’t worry if it looks confusing at first â every letter and number has a straightforward meaning. Let’s break down how to read car tire size.

Can I Put Larger Tires On My Car

While it’s certainly possible to upgrade your tires’ size, it’s usually best to stick to your manufacturer-recommended tire size for optimal performance. Increasing the size of your tires may give your car more ground clearance, but it may also affect handling, drivetrain performance and fuel economy. Keep in mind the changes to key figures mentioned above, such as load index and speed rating, and how they may affect your vehicle’s capabilities if you decide to increase tire size.

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How To Understand Your Current Tire Size

Knowing your Jeep’s tire size can be essential information when it comes time to replace that rubber, or even if you ever decide to change wheels. And while a stock tire size is imprinted right inside the driver side B pillar, you may not know what if have if you are not the original owner.

So here is some helpful information to assist you in determining what you currently have on the vehicle.

First, the sidewall of your tire contains all the information needed to understand everything about that specific tire. All tires are required to have this information, regardless of the manufacturer brand name.

Now, this information could read in a few different ways. For example, it could simply say 35×12.5 R17, or it may show as P265 75 R15. If it is the first listing, then here is the breakdown. That first number is your tire size at 35″, and then the second number tells you the tire width at 12.5″. That third reading is the tire type as radial and diameter as 17″.

The second listing is a metric set up, and is what is more common on factory-type sized tires. From left to right, the P indicates a passenger tire while 265 indicates the tires width in millimeters. That 75 is the tire’s aspect ratio and simply means the tire’s height is equal to 75 percent of its width. Finally, like the first set of numbers, that R15 means it is a radial tire and has a 15″ diameter.

Tire Size Equivalent Chart For 33 35 37 Or 40 Tires

How To choose The BEST Tire Size! A Tire Size Guide

Our tire experts often get questions about the sizes that are considered a 33″, 35″, 37″ or 40″ tire. These numbers are referring to the older tire sizing system known as Flotation sizes. These days we also have similar tire sizes in the metric tire sizing, which makes the decision on what size tire will fit your rig downright confusing. Not all tires are exactly the height or overall diameter that they state to be. It might say it is a 35X12.50-20, but the actual diameter noted in the specs is 34.6″. The chart below should give you a good idea for the various tire size equivalents for popular truck sizes. Tirebuyer has one of the largest selections of All Terrain and Mud Terrain tires in stock ready to ship fast and free.

33″ Tires

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Benefits Of Using A Bike Tire Size Chart

Here are the key benefits of using a bike tire size chart

  • You will be able to match the specific bike size with the right tire size without making mistakes
  • You will be able to make measurements on your own and determine which type of wheels you should be looking at
  • You can settle on long-lasting tires now that you know the correct wheel size
  • You can be assured of a perfect rim for your bike tire size.

What’s My 20 Inch Tire Width

If you need to know the width of your 20-inch tires, look for a series of number similar to: P245/50 R20. This number should be on the vehicle’s tire information placard on the inside of the driver’s side door or printed on the sidewalls of your current tires. The width of your tires in millimeters will be the first number in the series. In this example, the tire’s width would be 245mm.

Read Also: 265/65r18 All Terrain Tires

Tire Size Chart Load Capacity

load capacity code The load capacity of a car tire is displayed in a code. This code consists of 2 digits. In our example it says 87. According to the table, the code 87 stands for 545 KG. This means that this tire can carry a weight of 545 KG without breaking down. This is sufficient for an average passenger car. This would be too little for a van. Even if the sample tire would fit around the rim of a van, the tire is not suitable for the application. In the table below you can see the codes that correspond to the weight in KG.


Helpful Tire Size Tips

Tyre Chart
  • If upgrading to larger tires, use our gear ratio calculator to find your recommended gear ratio.
  • Tire width is the maximum width of the tire which is usually at the sidewall of an inflated tire.
  • Tread width is the actual width of the tire tread .
  • An “LT” after the tire size indicates that the tire is designed for “Light Truck” use.

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Street Legal Laws

To find the street legal laws for your state including maximum suspension lift heights and tire size rules visit

Recommended Reading: 265/65r17 All Terrain Tires

Does Point Seven Five Equal Three Quarters

Inch-based designations sometimes express the width in a and sometimes as a common fraction . This is the most common cause of mismatches. Although these size designations are mathematically equal, they refer to different size tires, which are NOT interchangeable. It is dangerous to generalize when talking about tire sizing, but I would confidently state the following:

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