How tall is a 305 55r20 tire


305/55R20 In Inches - Tire Sizes Fitting & Alternatives

What size tire is 305/55R20 in Inches?

The 305/55R20 equivalent to 33.2x12R20 in inches, as follow:

  • 33.2 inches (844mm) stand for the tire diameter, also referred to as the tire height
  • 12 inches (305mm) is the tire width, this may also know as the section width
  • 20 inches (508mm) represent the rim diameter or called the wheel diameter that can be mounted on.

InchesMetric
Diameter33.2"844 mm
Tread Width 12"305 mm
Rim Diameter20"508 mm
Sidewall Height6.6"168 mm
Circumference104.3"2649 mm
Revolutions608"378 mm

104. 3"

608 Revs/Mile

What is 305/55R20 tire diameter?

The 305/55R20 has an overall diameter of 33.2 inches or 844 mm tall (Measurement of a tire’s outside diameter through its exact center when inflated with no load.)

How wide is a 305/55R20 tire’s width?

The 305/55R20 has a width of 12 inches or 305 mm wide. This is the measurement of the tire at its thickest point, the distance between the outer sidewall’s widest point and the inner sidewall’s widest point. This physical width of the tire can change if the tire is mounted on a wheel slightly wider or narrower than the size indicated by the rim width.

What is a 305/55R20 tire sidewall height?

The 305/55R20 has a sidewall height of 6.6 inches or 168 mm tall. It’s measured from the rim to the outer edge of the tire.

What size rim do you need for 305/55R20?

The 305/55R20 tire has a size rim of 20 inches or 508 mm. This number represents the distance between the two bead seat areas where the tire is sealed onto the wheel.

How many revolutions for 305/55R20 per mile or kilometer?

The 305/55R20 performs 608 revolutions per mile or 378 revolutions per kilometer. Revolutions per mile indicate the number of times a tire revolves while it covers the distance of one mile/kilometer

How about 305/55R20 tire circumference?

The circumference of 305/55R20 is 104.3 inches or 2649 mm.

What’s wider or narrow than 305/55R20 is acceptable?

You can replace the 305/55R20 tires that are within ±3% of the overall tire diameter. In this case, it’s between 32.2 and 34.2 inches (819mm to 869 mm). Check our tire size chart here or the tire size calculator tool here to find your size.


Tire Size Chart for 20" Wheels:




36″ Tire Diameter

  • 355/60R20 = 36.8x14R20
  • 375/55R20 = 36.2x14.8R20

37″ Tire Diameter

  • 315/70R20 = 37. 4x12.4R20

39″ Tire Diameter

  • 325/75R20 = 39.2x12.8R20

295 55r20 vs 305 55r20 Tire Size

When you are looking for a new set of tires, the options can be overwhelming. Do you go with a smaller size or a bigger size? What brand should you choose? And what about the type of tire? Should you get all-season tires or performance tires? One of the most important decisions is deciding between 295 55r20 and 305 55r20 tires. 

In this table, we will help you make that decision by discussing the pros and cons of each size.

295 55r20

305 55r20

Diameter 32. 78 inches

Diameter 33.21 inches

Width 11.61 inches 

Width 12.01 inche 

Sidewall Height 6.39 inches 

Sidewall Height 6.6 inches 

Radial Tire (A Radial-Ply Tire)

Radial Tire (A Radial-Ply Tire)

Rim Size 20 inches

Rim Size 20 inches

Circumference 102. 97 inches

Circumference 104.33 inches

Revs Per Mile 615

Revs Per Mile 607

Aspect Ratio 55% Of Its Width

Aspect Ratio 55% Of Its Width

What Does 295 55r20 Tire Mean?

The 295 55r20 tire size is a common choice for many vehicles. This size tire is meant for light trucks and SUVs. They offer a good balance of traction, comfort, and durability. The first number is the width of the tire in millimeters. In this example, it is 295 millimeters.

The second number is known as the aspect ratio. This measures how tall the sidewall is about the width. The aspect ratio is 55, which means that the tire’s sidewall height is 55 percent of its width. The third letter on the sidewall is the tire construction. The most common construction is “R,” which stands for radial. The fourth and fifth numbers are the wheel diameter in inches. In this case, it is 20 inches.

Tire Width

One of the main differences between 295 55r20 and 305 55r20 tires is width. The 295 is 20 millimeters narrower than the 305. In short, The width of the 295 55r20 is 295 millimeters, and the width of the 305 55r20 is 305 millimeters.

This may not seem like a big difference, but it can affect your vehicle’s performance. A wider tire will provide more stability and grip. A narrower tire will be lighter and offer better fuel economy.

Aspect Ratio

As we mentioned before, the aspect ratio is the second number on the sidewall. It measures how tall the sidewall is about the width of the tire. The higher the aspect ratio, the taller the sidewall. The aspect ratio of the 295 55r20 is 55, and the aspect ratio of 305 55r20 is also 55. This means that the height of the tire is 55% of the width.

So, the Aspect Ratio of 295 55r20 is 55% which is 162.25 millimeters, and the Aspect Ratio of 305 55r20 is 55% which is 167.75 millimeters. The difference in aspect ratio between the about 5 millimeters. It’s important to note that the width and aspect ratio can affect the tire’s diameter.

Construction Type

Another thing to note is the construction type. The most common construction type is “R,” which is radial. Radial tires are the standard for many passenger vehicles. They are made with steel belts that run across the tread and provide good stability and durability. Both of the tire sizes have the same construction type. So, the 295 55r20 and 305 55r20 both have radial construction.

Rim Size

The last number on the sidewall is the rim diameter. This is the size of the wheel that the tire will fit on. In this example, it is 20 inches. The difference between 295 55r20 and 305 55r20 is that the former has a 20-inch rim, and the latter has a 20-inch rim. In This aspect, there is no difference between them.

Circumference

One important thing to note is that the width and aspect ratio can affect the tire’s diameter. The diameter is the distance from one side of the tire to the other. It’s important because it determines how much ground contact the tire has.

The circumference is the distance around the outside of the tire. To calculate it, you need to know the diameter. The circumference of the 295 55r20 is 102.97 inches and the circumference of the 305 55r20 is 104.33 inches. As you can see, there is about a one-and-a-half-inch difference in circumference between the two sizes.

Revolutions Per Mile

The revolution per mile or RPM measures how often the tire goes around in one mile. To calculate it, you need to know the circumference of the tire. The RPM of the 295 55r20 is 615, and the RPM of the 305 55r20 is 607. So, there are about eight fewer revolutions per mile with the 295 55r20.

Conclusion

Now that you know the basics of tire size, you can start to compare different sizes. Keep in mind that width, aspect ratio, and diameter can all affect the performance of your vehicle. The best way to decide which size is right for you is to consult with a professional.

They will be able to help you find the perfect tire for your needs. Thanks for reading! We hope this article was helpful. Please feel free to share it with your friends or family if you find it useful.

Related Article

  • 285 60r20 vs 305 55r20 Tire Size

305/55 R20 vs 285/55 R20 Graphic tire size comparison (difference in inches)

Your machine size

/ 253035404550556065707580859095100 R 121314151617181920212222. 52324

Calculate

135145155165175185195205215225235245255265275285295305315325335345355365375385395 / 253035404550556065707580859095100 R 121314151617181920212222.52324

New tire size

CM INCHES


Index Old New Difference
Diameter - - -
Width - - -
Circumference - - -
Profile height - - -
RPM - - -
Clearance change -
Result: -

With speedometer:

Real speed will be:

Comparison of 305/55 R20 and 285/55 R20 tire sizes.

In the table above you can see a detailed comparison of the difference in dimensions, parameters and performance between a 305/55 R20 tire and a 285/55 R20 tire. The results of the calculations are also presented in the form of visual models (infographics), on which the tire with a size of 305/55 R20 is on top, and with a size of 285/55 R20, respectively, at the bottom. The visualization was generated in two projections: lateral (left) and frontal (right). The online calculator compares tires according to the following characteristics: diameter, width, circumference, profile height, revolutions per km, ground clearance change. In addition, a potential deviation between the actual speed and the speed displayed on the speedometer is calculated, which can occur if the difference between tires 305/55 R20 and 285/55 R20 is significant. US and UK inch version of calculations.

If you want to compare other tyres, just select the required parameters in the drop-down fields and click on the green button.

Infographic

Side Comparison Frontal comparison

See also:

RAM SRT10 tire sizes - Dimension tables

General parameters:
  • Tire width without load (B): 125-135 to 345-364;
  • Diameter (D): 487-495 to 952-962;
  • Outer circumference (L): 1541 to 2990;
  • Tire profile or height (h): from 58 to 518.
Possible tire sizes for RAM SRT10:
  • 305/40r22
  • 275 9000 9000 9000 9000 9000 9000 9000 9000 9000 9000 9000 9000 9000 9000 9000 9000 9000 9000 9000 9000 9000 9000 9000 9000 9000 9000 9000 9000 9000 9000 9000 9000 9000 9000 9000 9000 9000
  • To determine the tire profile height (H), measure the difference between the outer and inner diameter of the tire (actual profile height) and divide it by the distance between the outer edges of the rubber.

    Important: when determining the tire width (B), elevations due to additional belts, letters, contours and tire upholstery are not taken into account, in general, this parameter should not exceed the width of the wheel rim by more than 30%.


    General view
    General view of tire
    Tires
    Possible tire size for RAM SRT10 of different years of release and modifications
    Drks
    Possible disks for RAM SRT10. RAM SRT10 of different years of manufacture and modifications

    (General view)

    305/40R22
    275/55R20
    22x9.5
    20x8.5
    22 '' 20 ''
    9000 years years years years years tires in the format:

    1.


    Learn more