It’s vital that you put the right size tires on your vehicle for proper operation. However, not everyone knows how to read the tire size. With so many numbers and letters listed on the sidewall of the tire, it can be difficult to decipher the meaning.

In this article, we examine all of the information listed on the tire sidewall. You will know how to read the tire size and all of its information by the time you are finished.

**Table Of Contents** show

**Tire Size Meanings**

**The three numbers you will find on the tire’s sidewall represent the width, height, and diameter of the tire, respectively. The width is measured in millimeters and indicates how wide the tire is from side to side. The height is measured in a height-to-width ratio. The diameter is measured in inches and tells you the size of the rim or wheel that the tire will fit onto.**

For example, a tire with a width of 225, a height of 50, and a diameter of 17 would be considered a 225/50/17 tire.

Every tire sidewall contains the tire type, tire width, aspect ratio, and construction. It also contains the wheel diameter, load index, speed rating, DOT symbol, TIN, and UTQG information. This data must be used together to determine if it’s the right tire for your vehicle.

### 1. Tire Type

** P**225/65R17 95H

Most car tires have the letter “P” at the front of the tire size. This letter signifies that it is a P-Metric tire designed for the standards of passenger vehicles.

If you see the letters “LT” instead, it means Light Trucks. Tire manufacturers design these for the higher inflation needs required by some trucks.

There are also other types that are used, such as “T” for Temporary, “ST” for Trailer and “C” for Commercial. However, there’s also the chance that there’s no letter on the tire. If this is the case, it might have been made in Europe. Euro-metric tires are similar to our Passenger tires.

### 2. Tire Width

P** 225**/65R17 95H

The tire is measured by its width. This measurement is given in millimeters, based on how much room there is between each sidewall.This can also be referred to as the section width.

In the tire size, the first three numbers refer to the width of the tire. As an example, if your tire size is P225/65R17, the width of the tire would be 225 millimeters.

### 3. Aspect Ratio

P*225*/**65**R17 95H

After the slash mark, the next number you will see is the tire’s aspect ratio. The aspect ratio of a tire is the height of the cross-section compared to the width. This two-digit number is found after the slash symbol in the tire size.

In the example used above, P225/65R17, the 65 is the aspect ratio. It shows that the height of the tire is equal to 65% of the width. This figure determines how well the vehicle handles your tires. The higher the number is, the longer the response time when turning, while the lower number indicates a faster response to a command.

### 4. Construction

P*225*/65** R**17 95H

Most passenger tires feature an “R” after the aspect ratio. This letter signifies that it is a Radial Tire. These tires are the most common on the road and are made by assembling piles of fabric, steel, and polyester, along with coated rubber, lying perpendicular to the direction the tire travels. This design provides the smoothest ride and longer tread life.

There can also be tires with a “D,” standing for Diagonal Piles. These are otherwise referred to as Bias-Constructed Tires, Bias Ply or X-Ply, Cross-Ply and Conventional Tires. You will find this type most commonly used with trailer or motorcycle tires.

Additionally, some tires feature an “F” before the construction letter. This letter is only found on run-flat varieties.

### 5. Wheel Diameter

P*225*/65R** 17** 95H

It’s important to know what size wheel the tire is meant for. The final number in the sequence is the diameter of the wheel or rim diameter. This figure shows what size wheel should be used with the tire.

The measurement is determined by figuring out the space across the center, from one size to the next. Usually, this figure is listed in inches, such as 17 inches from our example, P225/65R17.

### 6. Load Index

P*225*/65R*17* **95**H

The load index is the figure used to show the total weight the tire is capable of handling when it is at full inflation. The higher the number of the tire’s load index rating, the more weight you can put on the tires. However, you can’t easily tell how much weight it holds just by looking at this figure.

Instead, you need to reference a chart that shows you what the load index rating means. As an example, a load capability of 117 means that the tire can handle 2,833 pounds of weight. Most passenger vehicles use load indexes ranging from 70-125.See load index chart

### 7. Speed Rating

P*225*/65R17 95*H *

The speed rating or maximum speed rating is another figure that needs to be referenced with the help of a chart. This figure relates to the top speed capability you can use the tire at.Tires with higher speed ratings provide more control at higher speeds and can handle heat better.

The most common speed ratings for a family sedan, SUVs and van tires are S and T, translated as 112 or 118 mph. H (130 mph) is commonly used with passenger cars, SUVs, light pickup trucks, coupes and sports cars. Other light trucks use N, P, Q or R (87, 93, 99 and 106 mph).

If you drive a high-performance vehicle, you might see a V, W or Y (149, 168 or 186 mph). Almost all of the winter tires use either the Q, S or T speed rating.Of course, this is just the tire’s maximum speed capability and you should always follow the legal speed limits. See speed rating chart

### 8. DOT Symbol

Every tire sidewall used in the United States should have the DOT symbol located on the side. The DOT stands for Department of Transportation.

With this symbol, you know that the tire complies with Federal Motor Vehicle Safety Standards. Any reliable manufacturer uses the DOT symbol, so there’s nothing to worry about when you are buying a top brand.

### 9. TIN

Just like your car has an identification number, your tire also contains a serial number. The Tire Identification Number (TIN) tells you everything you need to know about the tire. This number is located after the DOT letters.

The TIN can be eight to 13 letters/numbers to identify the most important aspects of the tire. Not only will it reveal where the tire was made, but it also shows the manufacturer’s code plus the date the tire was manufactured.

### 10. UTQG

The UTQG stands for Uniform Tire Quality Grading. This rating system was made by the Department of Transportation and it provides you with the data needed to purchase the best tires based on temperature capability, traction and treadwear.

The traction grade shows the wet traction capability of the tire as performed during controlled testing. The AA-rated tire provides the best traction when driving on wet roads.

The temperature grade shows the ability of the tire to handle and dissipate heat. The higher the temperature grade, the more capable it is of operating at faster speeds. A temperature grade of A can handle speeds over 115 mph.

The treadwear grade shows how the tire responded to government testing. It’s designed to reveal the expected wear of the tire’s tread. The government test course runs 6,000 miles, so it’s long enough to reveal how the tire should wear. The tire with a 150 grade would wear 1.5 times better than the similar tire with a 100 rating. With that in mind, a tire with a rating of 200 would last twice as long as that same 100-grade option.

Still, the wear of a tire is going to depend on far more than what this rating is. Tire performance relies heavily on how the vehicle is driven, the type of roads it is used on, and several other factors. The rating only shows what the tire is capable of.

RELATED:

## Is Tire Size Important?

The tires must fit your vehicle perfectly for proper operation. The first issue with improperly sized tires is the appearance. When you put on tires that are too small or too large for your vehicle, it isn’t going to look right.

However, there are more dangerous ramifications of using the wrong sized tires. The tires are responsible for supporting the weight of your vehicle and are the only aspect that is touching the road. To ensure your on-road safety, the tires must be rated for your vehicle or you are putting yourself at risk.

If you use tires that aren’t meant for your vehicle, the handling becomes compromised. You might notice issues when you attempt to turn or you hit slick roads. Finally, the tires will also wear sooner when they aren’t right, causing you to spend more money on replacements.

Your car owner’s manual will tell you what tire size is appropriate for your vehicle. You can also find the information on the placard located inside the driver’s side door jamb.

## Tire Size Examples Explained

We will evaluate two popular types of tiresto show you how to read them based on the factors listed above. As we look at these examples, you should be able to figure out your owntire sizesusing the same formula.

Our first example is with P225/65R17 100T. If your tire says this, you would evaluate it based on the following criteria.

- Tire Type: Because it has a P before the numbers, you know that it is a passenger tire. This is the most common found on the road.
- Tire Width: This tire measures 225 millimeters. This measurement is taken from sidewall to sidewall, estimated to be slightly more than ten inches.Also called section width.
- Aspect Ratio: The tire’s sidewall is 65% of the tire’s width. Knowing this, the sidewall is about 146 millimeters or about 5.75 inches.
- Construction: The R stands for Radial Tire. This is the most common tire type on the road.
- Wheel Diameter: The diameter measures 17 inches. This is measured from edge to edge, showing what size wheel you should put the tire on.
- Load Index: If the load index of this tire was rated at 100, the tire can carry up to 1,604 pounds.
- Speed Rating: This tire has a speed rating of T. That would mean it is built for speeds up to 118 mph.

As a review, this P225/65R17 100T tire is considered a passenger tire that contains a width of 225 millimeters. It features an aspect ratio of 65% with a radial construction. Plus, it features a 17-inch diameter that can carry up to 1,604 pounds and travel up to 118 mph.

Let’s look through one more example to ensure you get the point. For this example, we will use P275/55R20 111S.

- Tire Type: Because it has a P before the numbers, you know that it is a passenger tire. This is the most common found on the road.
- Tire Width: This tire measures 275 millimeters. This measurement is taken from sidewall to sidewall, estimated to be slightly smaller than 11 inches.
- Aspect Ratio: The tire’s sidewall is 55% of the tire’s width. Knowing this, the sidewall is about 151 millimeters or about 6 inches.
- Construction: The R stands for Radial Tire. This is the most common tire type on the road.
- Wheel Diameter: The diameter measures 20 inches. This is measured from edge to edge, showing what size wheel you should put the tire on.
- Load Index: If the load index of this tire was rated at 111, that tire can carry up to 2,403 pounds.
- Speed Rating: This tire has a speed rating of S. That would mean it is built for speeds up to 112 mph.

As a review, this P275/55R20 111S tire is considered a passenger tire that contains a width of 275 millimeters. It features an aspect ratio of 55% with a radial construction. Plus, it features a 20-inch diameter that can carry up to 2,403 pounds and travel up to 112 mph.

## Where to Find The Tire Size?

Before you put new tires on your vehicle, you want to be sure you are choosing the right tire size. There are two ways to reference the tire size of your vehicle.

First, you can look at the tires that are currently on it. Matching this information is a good way to get the same tires on your vehicle. However, there’s a flaw with this method. If someone put the wrong tires on before you bought it, you may not know.

That’s why it’s always recommended to check the door jamb located inside the driver’s side. There is a placard that shows the appropriate tire size. You might also find it in the owner’s manual. These measurements are provided directly from the car manufacturer, so you know you can’t go wrong.

## Frequently Asked Questions

### What do the 3 numbers mean on tire size?

The three numbers on tire size represent the width, height, and diameter of the tire, respectively. The width is measured in millimeters and indicates how wide the tire is from side to side. The height is measured in a height-to-width ratio. The diameter is measured in inches and tells you the size of the rim or wheel that the tire will fit onto.

For example, a tire with a width of 225, a height of 50, and a diameter of 17 would be considered a 225/50/17 tire.

### How to read tire size on a truck?

Trucks usually use the same tire size system as cars. The first number in a truck tire size is the width of the tire in millimeters. The second number is the height, called the aspect ratio. The third number is the diameter of the wheel in inches. You can also find truck tire sizes in inches, which we explain further down.

### How to read tire sizes in inches?

Tire sizes in inches can be a little different than tires sizes in millimeters. For example (35X12 50R18) – The numbers 35 and 12 refer to the diameter and the width of the tire, respectively, while 50 indicates the aspect ratio (the percentage of the sidewall height compared to the width). The final R18 denotes the rim diameter in inches, so, a 35X12 50R18 tire would be a 35-inch in diameter tire with a 12-inch width and an 18-inch rim diameter.

### How to read a motorcycle tire size?

Motorcycle tire sizes are usually the same as car tire sizes. The first three digits represent the width of the tire in millimeters (mm). The second two digits after the slash mark represent the aspect ratio, which is the height of the tire’s cross-section to its width. Finally, the last two digits after the dash represent the diameter of the motorcycle wheel, in inches.

## Tire Size Charts

#### Load Index Chart

Load Index | Load (lbs) | Load Index | Load (lbs) |
---|---|---|---|

71 | 761 | 100 | 1764 |

72 | 783 | 101 | 1819 |

73 | 805 | 102 | 1874 |

74 | 827 | 103 | 1929 |

75 | 852 | 104 | 1984 |

76 | 882 | 105 | 2039 |

77 | 908 | 106 | 2094 |

78 | 937 | 107 | 2149 |

79 | 963 | 108 | 2205 |

80 | 992 | 109 | 2271 |

81 | 1019 | 110 | 2337 |

82 | 1047 | 111 | 2403 |

83 | 1074 | 112 | 2469 |

84 | 1102 | 113 | 2535 |

85 | 1135 | 114 | 2601 |

86 | 1168 | 115 | 2679 |

87 | 1201 | 116 | 2756 |

88 | 1235 | 117 | 2833 |

89 | 1279 | 118 | 2910 |

90 | 1323 | 119 | 2998 |

91 | 1356 | 120 | 3086 |

92 | 1389 | 121 | 3197 |

93 | 1433 | 122 | 3307 |

94 | 1477 | 123 | 3417 |

95 | 1521 | 124 | 3527 |

96 | 1565 | 125 | 3638 |

97 | 1609 | 126 | 3748 |

98 | 1653 | 127 | 3858 |

99 | 1709 | 128 | 3968 |

#### Speed Rating Chart

Symbol Speed | Speed (km/h) | Speed (mph) |
---|---|---|

A1 | 5 | 3 |

A2 | 10 | 6 |

A3 | 15 | 9 |

A4 | 20 | 12 |

A5 | 25 | 16 |

A6 | 30 | 19 |

A8 | 40 | 25 |

B | 50 | 31 |

C | 60 | 37 |

D | 65 | 40 |

E | 70 | 43 |

F | 80 | 50 |

G | 90 | 56 |

J | 100 | 62 |

K | 110 | 68 |

L | 120 | 75 |

M | 130 | 81 |

N | 140 | 87 |

P | 150 | 94 |

Q | 160 | 100 |

R | 170 | 106 |

S | 180 | 112 |

T | 190 | 118 |

U | 200 | 124 |

H | 210 | 130 |

V | 240 | 149 |

W | 270 | 168 |

Y | 300 | 186 |

## Conclusion

Now that you know how to read your tire size, you will be prepared for the next time you are about to buy new tires. Although there’s a lot of information on the sidewall of a tire, it’s not as complicated as it may seem.

In fact, once you know what to look for, understanding your tire size is pretty easy. By knowing how to read your tire size and what the numbers on the tires mean, you can now buy the perfect tires yourself and make sure you have the best tires for your car.

#### Sources

Learn more:

- How Often Should You Rotate Your Tires?
- How Much Does it Cost to Replace Your Tires?
- 10 Best All-Season Tires

Categories:Tires, Guides

## FAQs

### How do you read tire sizes for dummies? ›

**The first number to appear in your tire size information is the width, in millimeters, of the correct tires for your vehicle**: P225/70R16 91S. Tire width always refers to the measurement from one sidewall to another.

**How do you explain tire size numbers? ›**

**The two-digit number after the slash mark in a tire size is the aspect ratio**. For example, in a size P215/65 R15 tire, the 65 means that the height is equal to 65% of the tire's width. The bigger the aspect ratio, the bigger the tire's sidewall will be.

**What do the 3 numbers mean on tire size? ›**

B: **TIRE WIDTH** The three-digit number following the letter is the tire's width (from side to side, looking at the tire head on) in millimeters. This may also be referred to as the section width. C: ASPECT RATIO The forward slash separates the tire width number from the two-digit aspect ratio.

**What does 265 70 r17 mean? ›**

**265 is the width, 70 is the aspect ratio, R stands for radial, 17 is the wheel diameter and 115T is the load index and speed symbol**. Cookie Settings.

**What do the letters on tires mean? ›**

A "P" stands for p-metric, which is a tire used primarily on passenger cars. An "LT" indicates a light-truck tire. A "T" means it's a temporary spare. Some tires get a "Z" or an "F" attached to the radial indicator, denoting a Z-rated tire (see service description below) or a run-flat tire.

**What does LT mean on a tire? ›**

What Does LT Mean on a Tire? An “LT” on your sidewall before that long string of numbers and letters denoting your tire size signifies the tire is a "**Light Truck-metric**" size; it was designed for use on a vehicle that carries heavy cargo loads or tows a large trailer.

**What does 225 45R17 mean? ›**

So if the tire markings indicate P225/45R17 91V, it means that **the height of the sidewall is 225 multiplied by 0.55 or 101.25 millimeters**. The number 45 means that the height is equal to 45 percent of the width. Bigger tire ratio indicates bigger and taller tire sidewall.

**How do you read tire sizes in inches? ›**

**A standard sized tire will be displayed in inches**. A tire that reads 33 x 12.5 R15, is 33-inches in diameter (or tall), 12.5-inches wide, and will fit a 15-inch wheel.

**What does 113T on a tire mean? ›**

This two-digit or three-digit code represents your tire's load index. **The higher this number, the higher the weight each tire is rated to carry**. For example: A tire with a size of “275/55R20/113T” has a load index of 113. A tire with a size of “225/65R17/102H” has a load index of 102.

**What does 225 50 mean? ›**

**225 identifies the tire section width, which is the measurement of the tire from sidewall to sidewall in millimeters**. This measurement varies depending on the rim to which it is fitted. (There are 25.4 millimeters per 1 inch.) 50 is the two-figure aspect ratio.

### How do you decode tire numbers? ›

When the tire was made: Every tire has a Department of Transportation (DOT) number after the letters on the sidewall. **The last four digits determine the week and year the tire was made**; for example, the digits 2321 would signify that the tire was made during the 23rd week of 2021.

**Does the middle number on tires matter? ›**

Differences in Tire Size

Following the width is the middle number, which represents how tall the tire's sidewall is. Presumably, those with trucks and SUVs will have larger sidewalls than those with sedans and sports cars and vice versa. Lastly, the final number in the group is to represent the diameter of the wheel.

**Which tire is taller 70 or 75? ›**

**The higher the number, the taller the sidewall** (and vice versa). From the foregoing, it appears that tires with the same section width should have the same width regardless of aspect ratio.

**How big is a 285 70 17 tire? ›**

285/70R17 Tire **Overall Width:11.50"Tire Overall Diameter:32.70"**Tire Tread Depth(in/32nds):15Wheel Diameter:17"RequiredWheel Width:7.5" - 9"Load Range:EMax Load (lbs.

**Which tire is taller 245 or 265? ›**

**265 tires are 20 millimeters wider than 245**. This difference allows 265 tires to be easier to handle, easier to achieve speed, and better economy compared to 245 tires.

**What does the S or Q mean on tires? ›**

P – Up to 93 mph. Q – Up to 99 mph. R – Up to 106 mph. S – Up to 112 mph.

**What is the Y or W on tires? ›**

Confusingly, **W-rated tyres are rated at a higher speed in excess of 168mph.** **Y-rated tyres are rated in excess of 186mph**. See the full list below. Tyre speed ratings should be matched to the official top speed of your car.

**What do tire abbreviations mean? ›**

Passenger Tires

"P" indicates that it's a passenger tire; 215 represents the width of the tire in millimeters; "65" is the height to width ratio; "R" indicates radial construction; "15" is the rim diameter code; and "95H" is the optional service description that consists of the load index (95) and the "H" speed rating.

**What does H mean on a tire? ›**

“H” represents the **speed rating**, which is how fast the tires can go based on their load capacity. This rating ranges from A – Z. “H” indicates a speed rating of up to 130 mph.

**What is better ST or LT tires? ›**

**ST tires have some of the highest load ratings**. This is one of the reasons they are designated for use on trailers. Truck and automobile tires do not have to withstand the weight and stress that is put on trailer tires. Venture Tip: Never substitute light truck (LT) or passenger (P) tires for trailer tires.

### What is P in tire size? ›

**The "P" is short for "P-metric," which is a designation by the Tire and Rim Association for a "passenger car" tire type**. A "P" signifies the tire was designed to primarily be used on passenger vehicles, which can include cars, minivans, SUV's and other light-duty pickup trucks.

**What does P225 75R16 mean? ›**

This is the measurement of the tire's tread width, from sidewall-to-sidewall (measured in millimeters). A P225/60R16 tire is **225mm wide**. An LT245/75R16 is 245mm wide. The second set of numbers is called the 'aspect ratio'. This refers to the sidewall height as a percentage of the tread width.

**What does P225 70R15 mean? ›**

Expert Reply: A P225/70R15 is **about 27 inches in diameter** while a P225/75R15 is about 28 inches in diameter. They are both nearly 9 inches wide and fit a 15 inch wheel. Both of the tires you mention are passenger vehicle tires as shown by the letter P before the size.

**What does 225 75 mean on a tire? ›**

- **The 225 is your tire's width in millimeters**. This is how wide the tire needs to be to fit your vehicles rim. - The second number, 75, is the height of the sidewall from the rim of the wheel to the road, also called the Ratio. This is also measured in millimeters. - The 'R' means that the tire is a Radial.

**What does 3.50 8 mean on a tire? ›**

This tube is for a rim (metal part of a wheel) which has a diameter of 8", thus we are OK so far. In our cases, 3.50 refers to tire width and in this nomenclature case ("3.50 - 8") 3.50 is also **the distance from tire edge to the rim (or the sidewall distance)**.

**What does 265 75R18 mean? ›**

The first number in a tire size is the width of the tire in millimeters. For example, an LT 265/75R18 has a section width of 265 millimeters, meaning **the tread section is that wide**. So clearly, the lower the number, the thinner the tire and the higher the number, the wider it is.

**What does 33x12 50 mean? ›**

Let's take this 33x12.50R17 Grabber AT2 for example: **33 is the tire height, or diameter (inches)** **12.50 is the section width (inches)** **R represents the carcass construction (radial)** **17 is the wheel diameter (inches)**

**Which tire is better H or T? ›**

H-Rated Tires: This is a perfect, average tire for most sedans and commuter vehicles. It might not seem to fit in our chart, but the tire speed rating “H” is rated for up to 130 mph. **T-Rated Tires: This tire is often recommended for family sedans and vans.** **It's rated for up to 118 mph**.

**What does R and T stand for in tire? ›**

The first three numbers (205) indicate the width of the tire tread in millimeters. 60 is the aspect ratio or profile of tire. This is indicated in percentage of the tire width. **“R” stands for the construction method of the tire indicating the tire is a radial tire**.

**What's better load range D or E? ›**

What's Better: Load Range D or E? Load range D and E tires have different weight capacities. For example, a load range D tire can handle 1,220 lbs at 65 PSI, while an E tires carry loads at 80 PSI. If looking at their load durability, **load range E tires are better**, but that is the only difference between them.

### What does the 55 in P215 55R17 93v stand for? ›

You find your tire size on the side of your tire. You'll see a number like P215/55R17 97V. The 215 is the width in mm, 55 is the **aspect ratio** and 17 is the diameter.

**What does 225 50 17 225 mean? ›**

Well, **225 refers to the diameter of the tyre in millimetre, while 50 represents the sidewall height, again in millimetre**. R indicates that this is a radial construction tyre and the last number 17 means that this radial will fit alloy disks that are 17 inches in diameter.

**What does 225 45 r18 mean? ›**

By way of example, in what follows, Continental decodes the sequence “225/45 R 18 95 H SSR MOE M+S”. The number “225” stands for the width of the tire in millimeters – so in this case the tire is 22.5 cm wide. The “45” that follows is the aspect ratio - the height of the tire sidewall as a percentage of its width.

**What does 215 70R16 mean? ›**

P215/70R16 100S. The next number following the slash (/) **indicates the height of the tire in a percentage of the section width**. In our example, the number is 70, which means the tire height is 70% of the section width, which is 215 millimeters. The height of this tire would be 150.5 millimeters.

**What do the final 4 digits in the tire information tell you? ›**

The final four digits on your DOT number will tell you **the tire's age**. The first two numbers of this grouping indicate the week of the year your tire was manufactured. The final two digits indicate the year that your tire was manufactured.

**What does 255 55R18 mean? ›**

If the markings say 255/55R18, it means that **the height of the sidewall is 255 multiplied by .** **55, or 140 millimeters**. The higher the aspect ratio, the taller the sidewall is in relation to the tread width. If it is a low number, it means that it is a low-profile tire such as those found on higher-performance cars.

**Can I use 70 instead of 65 tires? ›**

**Yes**. The second number in a tire size refers to the height of the sidewall of a tire. A larger number means a taller sidewall.

**Can I use 205 60r16 instead of 205 55r16? ›**

**Yes.** **It will have a slightly lower sidewall height, but should work fine**.

**Can I use 65 instead of 60 tires? ›**

**In most cases, yes, but you have to account for the increase in height from the taller aspect ratio with a 10 mm smaller diameter**. For example, if you have a 225/60/16 normal tire, you should use a 215/65/16 65 aspect ratio snow tire.

**What tire is wider 50 or 60? ›**

Aspect ratio refers to the tire's section height in relation to its section width, as a percentage. For example, a 60-series tire features a sidewall that is 60% as tall as the tire's section width. **A 50-series tire will feature a shorter sidewall, at 50% of section width**.

### Is 700 and 27 tires the same? ›

**27-inch and 700C tires are close enough in size that the inner tubes are compatible**; i.e. you can use a 27-inch inner tube in a 700C tire, and vice-versa. However, you can NOT use a 27-inch tire on a 700C wheel, and vice-versa.

**Is it better to have wider or taller tires? ›**

Overall, **wider tires are better for dry surfaces and for high-performance vehicles**. Greater surface area allows for better day-to-day traction and durability.

**Which tire is taller 33 or 285? ›**

...

Are 33 inch tires the same as 285?

Measurement | 33 inches tires (285/75/16) |
---|---|

Diameter | 32.8″ (883mm) |

Width | 11.2″ (285mm) |

Sidewall | 8.4″ (213mm) |

Circumference | 103.1″ (2619mm) |

**What size tire is equal to a 33X12 50? ›**

15" | 16" | 17" |
---|---|---|

33X11.50-15 | 375/55-16 | 285/70-17 |

33-12.50-15 | 305/65-17 | |

33X13.50-15 | 33X12.50-17 | |

33X15.50-15 |

**What size tire is a 305? ›**

How Big Is A 305 Tire? **33.21 inches** is the 305's total diameter. The majority of 305 tires are compatible with 16-inch-diameter rims.

**Should back tires be bigger than front? ›**

While **it's fine to put narrower tyres on the front and wider on the back**, it's pointless to put wider tyres on just one side of the car. This would change the weight balance and would mean one side of the vehicle would grip differently to the road when braking. It would change the cornering dynamic, too.

**Can I use a 245 instead of 255 for tire? ›**

**You can do whatever you like** but the 245 width tyres will have a smaller diamater so may affect your speedometer reading…

**Can I use 255 tires instead of 265? ›**

Are 255 And 265 Tires Interchangeable? **They might be**. A 265 tire tends to be about an inch/inch and a half taller than a 255 tire which means that you do need to take this into consideration as your existing rims might not be able to accommodate the extra inches.

**How wide is a 275 tire? ›**

**10.8 inches** (275mm) is the tire width, this may also know as the section width. 17 inches (432mm) represent the rim diameter or called the wheel diameter that can be mounted on.

**How do I know how much air to put in my tires? ›**

How to find the recommended tire pressure. **Your vehicle's recommended tire pressure can typically be found on a sticker inside the driver's door**. It's also usually listed in the owner's manual, says Cars.com. Tire pressure is measured in pounds per square inch (psi).

### How wide is a 225 tire? ›

The section width can be converted to inches by dividing the width in millimeters by 25.4 like so: (225 millimeters) / (25.4 mm/in) = **8.86 inches**.

**What does 3.50 6 mean on a tire? ›**

You will see 4.10/3.50-6 on the tire. This means **the tire is 4.1” in width, 3.5” in tire height (rim to outer edge) with a 6” rim height**.

**Is the a big difference between 275 and 285 tires? ›**

Overall in a comparison of 275 vs 285 tire, **285 tires come with a wider footprint** which enables better wet/snow/ice braking performances compared to a 275 tire. However a 275 width tire having a narrow footprint has a better noise performance compared to a 285 width tire.

**What's the difference between a 275 and a 265 tire? ›**

Going from 265 to 275 is fine on your car and you should not notice any difference in driving. It's **less than a 4% difference in width**: 10/265 = 0.0377).

**What does tire size 275 55r20 mean? ›**

The tire is **a (P) passenger tire, with a tread width of 275 millimeters, the sidewall is 55% as tall as the tread (section width) is wide, and the wheel diameter is 20 inches**.

**Do you go by PSI on tire or door? ›**

Your car has a recommended tire pressure that will give the best gas mileage, handling and tire life for that car — and **it's written right on the vehicle's door**. That's the one you should follow when filling them up with air to the recommended pressure, measured in pounds per square inch, or psi.

**How close to max PSI should your tires be? ›**

For instance, if 35 psi is recommended, and the maximum safe pressure listed on your sidewall is 44 psi, you can safely put **38 or 40 psi** in your tires. You can even go to 44 psi. You'll experience a harder ride, but you won't create a blowout danger. You may even experience sharper cornering and increased fuel economy.

**Is 40 PSI too much tire pressure? ›**

The turns also tend to work the sidewalls more and wear more on the edges of the tire. In most of these cases, **40 psi should be more than enough**, and since most modern tire designs will allow up to 44 psi (in some cases more) this is not a problem.

**Which tire is taller 205 or 225? ›**

**The 205 is 27.1 inches tall and the 225 is 28.4 inches tall**. The 225 has higher capacities available for it as well. Generally people go to the bigger size when they need more capacity than what the 205 offers.

**What is the difference between P225 and 225 tires? ›**

Euro-metric and P-metric tires in the same size (i.e. P225/60R16 & 225/60R16) are equivalent in their dimensions with just **slight differences in their load capacity calculations and inflation pressure tables**.

### Is a 50 or 60 tire wider? ›

Aspect ratio refers to the tire's section height in relation to its section width, as a percentage. For example, a 60-series tire features a sidewall that is 60% as tall as the tire's section width. **A 50-series tire will feature a shorter sidewall, at 50% of section width**.