How To Read Tyre Size

22.08.2023 0 Comments

How To Read Tyre Size
Your tyre’s sidewall contains all the data about your tyre in the form of numbers and alphabets. Read to find out what they indicate.

The first three digits of the tyre denote the section width of the tyre in mm. The aspect ratio of the tyre, in the form of two digits mentioned after the section width, denotes the ratio of the height of the sidewall to the percentage of the tread width. The letter ‘R’ denotes that the tyre has radial construction, while the letter ‘B’ denotes that it is a cross-ply tyre. The two digits after the letter ‘R’ mark the rim diameter. The tyre size concludes with a two-digit number denoting the load index, with a suffix to it marking its speed rating.

Your tyre’s sidewall contains all the data about your tyre. There are a series of numbers and alphabets on the sidewall. These numbers represent the size, the load bearing capacity and speed limit of your tyre. Understanding these code words will help you choose the perfect set of tyres for yourself, according to the demand of your vehicle and your driving style.

For example, your tyre sidewall marking says, 195/55 16 R 87V, you can read it as: 195 – Section Width – It is the tyre width in mm. It is measurement of the sidewalls of a tyre that starts from the surface where it connects with the rim to the part where the tread begins.55 – Aspect Ratio – It is the height of the sidewall expressed as a percentage of the tread width.

Here, an aspect ratio of 55 indicates that the section height of the tyre is 55% of the section width of the tyre. R – Construction – R represents the Radial contruction of the tyre. You will also find the letter B written on several tyres that represents the cross ply construction type.

However, radial tyres are the most popular ones. Read more about different types of tyre 16 – Rim Diameter – It is the inside diameter of the tyre. It indicates the diameter of the rim or rim height and is measured in inches.87 – Load Index – It is the maximum weight limit that a tyre can carry. It is represented by a two digit or three digit numbers.

For example, if the load index given on the tyre is 95, then it depicts that the tyre is capable of carrying a maximum load of 690 kg. This conversion from load index to load in kg is determined by look-up table. Read more about the Load Index V – Speed Rating – It is the maximum speed that the car can maintain with the given tyres and is denoted by English Alphabets.

What does 195 55 R16 mean?

April 25 2022, 4 min reading time Tyres are something that we see every day on vehicles. They’re the only point of contact between your car and the road, so it’s important to know as much about them before buying and storing your tyres! 195/55/R16 these markings tell you all sorts of things about your tyre, from its load capacity to its speed rating. So what do all those markings mean, and what should you look for when you’re buying new tyres? Keep reading to find out! Tyre markings and what they mean:

Tyre Size – 195/55R16 Load Index – (87) Speed Rating – (V) Manufactured date – Yes, tyres have an expiry date!

1. Tyre Size Car tyres come in all shapes and sizes. Some are big and chunky, others are slim and sleek. But what exactly does tyre size mean? And why is it so important to get the right size for your car? Tyre size is actually a combination of two things: the width of the tyre, and the diameter of the wheel that it fits.

  1. The width is measured in millimetres and usually ranges from 135 to 305 mm.
  2. The diameter of the wheel is measured in inches and is usually between 12 and 24 inches.
  3. The reason that tyre size is so important is that it affects a number of things, including the grip of the tyre, the rolling resistance, and the fuel efficiency of the car.

So it’s definitely worth making sure that you get the right size tyres for your car!

(195mm) width section of the tyre that comes in contact with the road (55%) Aspect ratio – the height of the sidewall as a percentage of its width (R16) This is the inner diameter of the tyre, where your rim fits. R means radial and 16 is in inches, 16 in wide.

2. Load Index – 87 & Speed Ratings – V The load index number is an essential piece of information that is required when shopping for car tyres. The load index number is used to determine the maximum weight that a tyre can support. This information is typically found on the sidewall of the tyre, and it is important to make sure that the load index number matches the requirements of your vehicle. Car tyres are like shoes for your car- they’re what keep you grounded. And, just like shoes, there is a wide range of tyre types available to suit different needs. But unlike shoes, the speed rating of a tyre is not always obvious. In fact, most people don’t even know that tyres have speed ratings! The speed rating of a tyre indicates the maximum speed at which the tyre can be used safely.

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The rating is based on tests conducted by the manufacturer under controlled conditions. Speed ratings are usually expressed as a letter, with ‘A’ being the lowest and ‘Y’ is the highest. The most common Speed Rating found on passenger car tyres is ‘S’, which has a maximum speed limit of 180kmp/ 112 mph.

So next time you’re out on the open road, take a look at your tyres and make sure you’re not exceeding their limits! 4. Manufactured Date Yes, car tyres have an expiry date! After about 6 years, the rubber starts to deteriorate and it’s time for a new set of tyres. So next time you’re looking at a set of tyres, make sure to check the manufacture date! You don’t want to be driving around on a set of tyres that are older than your car! So there you have it! The secret numbers on your tyres and what they mean. Now that you know how to read them, be sure to keep an eye on them every time you get a new set of tyres – or better yet, bring this post with you when you go tyre shopping so you can be sure to get the right ones.

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What does 205 55r16 mean?

Height – Height is the next standard parameter in tyre size (B). Marking 205/55 R16 means that the height is 55% of the width. It is easy to calculate: 205 • 55% (0.55) = 112.75 mm. The larger the B value in the formula, the higher the tyre will be and vice versa.

This parameter is very important. So, choosing a tyre with size 215/55 R16 instead of 205/55 R16, remember that the bigger the width, the bigger the height, which is not always appropriate. The higher wheels could lead to the higher centre of gravity, which impairs the cornering stability of the vehicle and increases the risk of roll-over.

Mounting tyres with a higher profile is advisable for vehicles with stiff suspension to improve driving comfort. It should be noted that the tyre height decreases as the tread wears out during operation.

What do tyre size numbers mean?

TYRE SIZES EXPLAINED – The sidewall code provides information on tyre size and construction (e.g. whether they’re radial), as well as their load-carrying capacity and speed rating. For example, the code on a common fitment for Australian cars is: 205/65R15 95H 205 indicates the normal section width of the tyre in millimetres (205mm).65 indicates its aspect ratio, a comparison of the tyre’s section height with its section width (65 indicates the height is 65% of its width).

What is the meaning of 195 55 R16 87v?

The tyre load index (also known as the load capacity index, tyre load rating or tyre hire load index) identifies the maximum load capacity of a tyre, i.e. the absolute carrying capacity. You will find this information on your tyres. But how is this number calculated? If you would like to go on holiday with a packed car or help someone move, it is important to know how much weight your tyres can carry.

  • A tyre is not designed for loads of any size.
  • That’s why it is important that you know and do not exceed the load capacity of your tyres.
  • The tyre load capacity is not so well known.
  • The figure indicates the maximum possible load of a tyre.
  • To calculate the load your rims and car can carry, in theory you can just take a look at your vehicle registration or the tyre sidewall.

You will find the tyre labelling there, The two- to three-digit number in the penultimate position stands for the tyre load capacity of your tyres. However, these indicators do not reveal anything about the permissible load in kilograms. So this is a useless indicator in everyday life.

It is easier to calculate the tyre load rating using our load index table for tyres. There you can find the maximum load in kilograms for the respective rating. For a tyre code with the digits 195/55 R16 87 V, the 87 in the penultimate position is relevant: This represents a tyre load rating of 87, i.e.

a load capacity of 545 kilograms.

Can I use 205 55R16 instead of 195 55R16?

A 205/55/ R16. is wider than a 195 therefore the ratio (that’s the middle figure) needs to be less, 50 or 45 in your case, otherwise the overall diameter of the tire will be larger, that may cause problems.

What is the difference between 195 60 R16 and 205 60 R16?

205/60R16 has a ~5% larger diameter than your 195/60R16. Assuming that they fit in your wheel arches, here are the effects you should be looking at: Your speedo will be off. You’d be driving 5% more than what it reads.

What is the R in a tire size?

Construction – The letter “R” in a tire size stands for Radial, which means the layers run radially across the tire.

Can I use 205 55R16 instead of 205 60r16?

Yes. It will have a slightly lower sidewall height, but should work fine. Just for completeness: For a 205/55r16 tire, the numbers mean:

205 – width of the tire in mm. On some wheels, you can go 5-10mm (approximately) over without a problem. However, it’s good practice to stay with the exact with of the stock tire 55 – height of the sidewall as a percentage of the width. (AKA, aspect ratio.) 16 – diameter of the wheel in inches.

If your width (205mm) and diameter (16″) match the tires that came on the car, you won’t have fitment issues. However, a lower profile (sidewall height) tire may lead to a rougher ride. See also Understanding Tire Sizes

Can I use 215 55R16 instead of 205 60r16?

Normally you shouldn’t change the size so the difference is more than 5% of the original size. In your case the difference would be 5,14% bigger with the new tyre, so I’d consider it okay. So when the speedometer shows 100 km/h you’re really going 105,14 km/h. I’d recommend going 215/55/16 if you want wider tyres.

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What does 195 55r15 mean?

What does 195-55R15 mean? Tire sizes are easy to understand once you learn how to read them. On this page you’ll find a color-coded explanation of the 195-55R15 tire code.

195 This number indicates that your tire has a width of 195 millimeters.
15 The tire size was designed to fit rims or wheels that are 15 inches in diameter.
55 This number means that your tire has an aspect ratio of 55%. In other words, your tire’s sidewall height (from the edge of the rim to the tire’s tread) is 55% of the width. In this case, the sidewall height works out to be 107 millimeters.
R This letter denotes how your tire was constructed. Radial is the standard construction method for about 99% of all tires sold today.

R Radial
B Bias Belt
D Diagonal


What does 195-55R15 mean?

What does 195 60 r16 mean on a tire?

CEAT SecuraDrive 195/60 R16 89V Specifications – 1 9 5 / 6 0 / r 1 6

Width 195 195 is the width in millimetres of the tyres cross section. Aspect Ratio 60 60 is the Aspect Ratio, it is the ratio of the sidewall height to the cross section width. Rim Diameter 16 16 inches, stands for the diameter of the wheel that the tyre is designed to fit. Construction R Radial construction. R stands for radial-ply construction. Load Rating 89 89 is the load index i.e. the maximum weight each tyre can carry at full speed. Speed Rating V V is the speed rating i.e. the maximum speed for the tyre at full load.

What tyre size is 90 90?

Tyre Sizing Equivalents

Old Sizes Low-Profile Equivalent
2.50/2.75 3.10 80/90
3.00/3.25 3.60 90/90
3.50 4.10 100/90
4.00 4.25/85 110/90

What is V and H in tyres?

Where Can I See My Tyre Speed Rating?

Speed Rating Max Speed (Mph) Max Speed (Kph)
H 130 210
V 149 240
W 168 270
Y 186 300

What does R and V mean in tyres?

So, what is tyre speed rating? – Essentially the speed rating of a tyre is the maximum speed that it can safely tolerate – if running at the approved load capacity. The rating is given as a letter and each letter represents a different speed. This rating exists to ensure the safety of your tyres.

Speed ratings range from L to (Y). The system is based on the European use of kilometres, which is why the ratings in mph seem as though they increase in unusual increments. The speed ratings are established by engineers who run the tyres in ten-minute increments until the desired speed has been met. In imperial terms, the difference between each letter is approximately 6mph.

The speed ratings by letter are outlined below: L = 75mph/120kmh M = 81mph/130kmh N = 87mph/140kmh P = 93mph/150kmh Q = 99mph/160kmh R = 106mph/170kmh S = 112mph/180kmh T = 118mph/190kmh U = 124mph/200kmh H = 130mph/210kmh V = 149mph/240kmh Z = 149mph+/240kmh+ W = 168mph/270kmh Y = 186mph/300kmh (Y) = 186mph+/300kmh+ V, Z, W, Y and (Y) are for sports cars.

L rated tyres are primarily for off-road and light trucks. Q is primarily for winter 4x4s. R is primarily for heavy-duty light trucks. S and T are primarily for family saloons and vans. U is primarily for saloons and coupes. H is primarily for sports saloons and coupes. Tyres with larger diameters often also have a higher speed rating because they are intended for use on higher-performance cars so need to be able to handle higher speeds.

For most modern cars, the tyre rating is not the same as the maximum speed the vehicle is capable of. For example, most family cars will have a tyre speed rating that is higher than the car’s maximum speed. This is mainly for safety reasons and so that the performance of the tyres always exceeds the maximum performance of the car.

What does 205 55r16 91w mean?

The markings usually look something like this: 205/55 R16 91V. The first number (205) tells you the width of the tyre in millimetres. The second number (55) tells you the height of the tyre as a percentage of the width. The letter (R) stands for ‘Radial’ which is the type of tyre.

Can I put 50 tyres instead of 55?

What’s the risk of running a different profile tire? There is not a whole lot of difference between a 50 and 55 series tire in terms of ride or handing. You may not notice any difference at all, depending on the composition and construction of the tires themselves.

The new tire is going to be taller, and have a larger circumference, but not much. Run the car past one of those radar speed limit signs (if you have those in your area) to see how much your speedometer is off – putting bigger tires on my car actually corrected the speedometer for me 🙂 And if tire clearance is tight already you might get some rubbing on the inner wheel wells.

The other issue to watch out for is ABS is calibrated to work with a specific range of tire diameters, but if 275/50/R20 is what the car came with from the factory you should be ok, it really isn’t that big of a difference.1) going down in profile makes for improved handling.

  1. There’s less sidewall to twist between the turn of the rim and the inertia and friction of the tread on the road.2) going down in profile makes for a less comfortable ride.
  2. Again, less sidewall means less “shock absorption” from the sidewall.3) changing profile and/or rim diameter will change the accuracy of your speedometer, and may eventually get you in trouble if you don’t get your speedometer re-calibrated to the new rolling circumference of the tire.

Smaller profile means more revolutions per mile, your speedo will be “optimistic” about how fast you’re going, reporting a higher number; larger profile means the opposite and you will think you’re at speed limit when you’ll be over.3) in general, changing width causes more issues than changing height, but sometimes you can do both and wind up with the same rolling circumference.

Can I use different tyre size?

Can you have different size tyres front and back? – Generally, in a front or rear-wheel drive, as long as you have ensured both pairs of tyres are the same, you can have different size tyres between rear and front if the suspension geometry is set to accommodate for this.

Can I upgrade my tyre size?

Upsizing wheels and tyres is a growing trend. We help you find the right balance between aesthetics, drive experience and safety. Published On Sep 03, 2019 08:00:00 AM Tyres are a crucial part of everyday motoring, as multiple factors like ride quality, road noise and braking are dependent on them. And while most people stick to the stock set, upgrading wheels and tyres is now a growing trend. However, is it really necessary to upgrade? What if you want to stick to the stock wheel-tyre combo? That’s not an issue at all.

  1. Manufacturers do extensive research and testing before finalising the right size of wheel and tyre to achieve the right balance between performance, comfort and efficiency.
  2. Although in some cases, cars are under-tyred in the interest of efficiency.
  3. So if you would like to upsize for better performance, or even aesthetics, we have simplified it for you.

But before getting into that, let’s first give you a better understanding of tyre markings. What’s the right size? One of the things to keep in mind while upsizing is to not move too far away from the standard total diameter of the tyre.This creates problems with the ride and handling balance, causes damage to suspension components, maybe even to the wheel arches.

  • Also the width should not be beyond the wheel arch for safety reasons, and to prevent the tyre from grazing the wheel arch when turning.
  • Bear in mind that a wider tyre will help the stability of the car and increase grip.
  • The ride quality will improve, but on the flip side, it will reduce the car’s top speed, affect fuel efficiency and increase the steering effort.

Also, a larger rim with a smaller sidewall will help cornering grip due to less sidewall flex but this will impact ride quality. While upsizing, it is recommended to stay within 3 percent from the total diameter of the tyre. Tyre width is inversely proportional to the sidewall height, so if you want to go for wider tyres, the corresponding sidewall height will have to go down.

  • Let’s use the Swift Z variant as an example and upsize it for easier understanding.
  • You can calculate the total diameter of the tyre by adding the wheel rim size to the sidewall size.
  • The Z variant has 185/65 R15 tyres.
  • Here, 185 is the width in millimetre, 65 is the aspect ratio and 15 is the rim diameter in inches (1 inch = 25.4 mm).

Total diameter of the tyre = (Sidewall width) x 2 + rim diameter = (65 percent of 185) x 2 + (15 x 25.4) mm = 621.5mm Now, you can keep the rim size constant and go for wider tyres, or get different profile tyres. Below are some of the options to which you can upgrade, which are within the 3 percent range of the standard total diameter of the tyre. Remember, don’t move too far away from the standard total diameter of the tyre. Upsizing is surely the way to go if you want to enhance your car’s ride and handling characteristics. However, you have to understand the pros and cons and upsize accordingly.

Do your research thoroughly and find a size that best suits your requirements. Don’t go by a tyre size based on the dealer’s recommendation, as he could be just trying to clear stock. Done right, upsizing can also improve the safety of your vehicle and deliver an enjoyable drive experience in addition to the improved aesthetics.

Also see: Everything you need to know about tyres Copyright (c) Autocar India. All rights reserved.

Can I use 205 65R16 instead of 205 55R16?

Properly, no. A 205/65R16 sized tire has a much taller sidewall compared to a 205/55R16 tire. If you used the taller sidewall tire you would very much lessen the handing, stability and control of your vehicle. In fact, you’d be all over the road.

Can I use 215 55R16 instead of 205 55R16?

The width of the tire 205/55R16 is 10 mm narrower than the 215/55R16, they are OK, it wouldn’t cause any problem.

Can I use 215 60r16 instead of 205 60r16?

Generally yes you can but as the tyre is marginally taller it would likely mean your speedo would be reading slightly under your actual road speed if on the driven wheels and it is possible that you may have wheel arch clearance issues though a little unlikely if fitted to the front wheels.

Which car tyre size is 195 55 r16?

Our 195 55 r16 tyres are compatible with cars such as Maruti Baleno, Hyundai Verna Fluidic, Elite Hyundai i20, Maruti Ciaz, Fiat Grande Punto, Hyundai i20 Active, and Tata Altroz.

What does 55R16 mean on a tire?

The number is the percentage of the width of the tyre. It is commonly known as the ‘aspect ratio’. So, the profile of our example tyre is 55% of 205mm, or 112.75mm. This number also increases in increments of 5.16 is the rim size, or the diameter of the inside of the tyre.

What does R 16 mean on a tire?

What do different numbers and letters mean on the sidewall of the tire? (for example tire size 205 / 55 R 16 94 T XL) / Nokian Tires The first three numbers (205) indicate the width of the tire tread in millimeters.60 is the aspect ratio or profile of tire.

  1. This is indicated in percentage of the tire width.
  2. R” stands for the construction method of the tire indicating the tire is a radial tire.
  3. The following two numbers (16) indicate the diameter of the wheel rim in inches.
  4. The next two or three numbers (94) indicate the load index of the tire.
  5. In the example, 94 means the tire can carry 670kg.

of weight when the car is doing the maximum speed set for the tire. The last letter (T) is the speed symbol. In the example “T” indicates that the maximum speed for the tire in 190km/h with maximum weight and ideal air pressure.

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: What do different numbers and letters mean on the sidewall of the tire? (for example tire size 205 / 55 R 16 94 T XL) / Nokian Tires

How tall is a 195 55R16 tire?

Tire Size Calculator – Tire & Wheel Plus Sizing BETA

Unit: Imperial Imperial Metric
Rim Diameter 16.00 in
Rim Width Range 5.50 in – 7.00 in
Overall Diameter 24.44 in
Sidewall Height 4.22 in