305/55R20 Tires

Understanding 305/55R20 tire size is crucial for making informed decisions when purchasing new tires, whether it is for replacement or upgrade, as it plays an important role in your vehicle's performance and safety. Let's explore 305/55R20 tire specs and dimensions, what vehicles come equipped with 305/55R20 tires, what are its replacement options, and where to buy 305/55R20 tires at lowest prices online.

Buy 305/55R20 Tires from $201.99

How to read 305/55R20 tire size?

305/55R20 is a Metric tire size that is commonly used on passenger and crossover vehicles. It also comes in a LT-Metric (LT305/55R20) and a P-Metric (P305/55R20) variant.

Let us decode each aspect of 305/55R20 tire size dimensions for better understanding:

  • 305 indicates tire's section width, which includes the entire width of the tire from one sidewall to the other. The tread width is typically a bit narrower than the section width. Section width of 305/55R20 tire is 305 millimeters.
  • 55 represents the aspect ratio of a tire. It is the ratio of the tire's sidewall height to its width. For 305/55R20 tire, the sidewall height is 55% of its tread width.
  • R denotes that tire has radial construction.
  • 20 indicates the wheel diameter in inches that the tire is designed to fit. 305/55R20 can be mounted on rims with 20 inches in diameter.

You can learn more about tire size markings on tire sidewall with our comprehensive guide on how to read tire size.

305/55R20 Tire Dimensions

Compare and visualize 305/55R20 tire dimensions in both inches and millimeters. Tire size calculator will help you calculate the dimensions of any tire size.

305/55R20 Section Width
12"
33.2"
305/55R20 Tire Side
Tire Circumference
104.2"
20"
6.6"
608 Revs/Mile
Metric Inches
Tire Width 305 mm 12"
Aspect Ratio 55%
Rim Diameter 508 mm 20"
Tire Diameter 844 mm 33.2"
Sidewall Height 168 mm 6.6"
Circumference 2650 mm 104.2"
Revolutions 377 per km 608 per mile

305/55R20 Tire Width

Tire width is the measurement of the tire's cross-section at its widest point. 305/55R20 tire has a width of 305 millimeters or 12 inches.

Tires with section width of 305 millimeters come equipped on a variety of passenger cars, pickup trucks and sport utility vehicles.

Tire width of 305 millimeters falls under extra wide category. For trucks and SUVs, extra wide tires offer enhanced stability and load-carrying capacity. For high-end sports cars and supercars they offer maximum traction and performance at high speeds.

Tire width plays a pivotal role in determining a vehicle's handling, safety, and efficiency. It is crucial to consider the compatibility of tire width with the vehicle's design and the manufacturer's specifications to maintain optimal functionality and ensure safety.

Tire Width
12"

305/55R20 Aspect Ratio

Tire aspect ratio represents the height of the tire's sidewall as a percentage of its width. 305/55R20 tire size has an aspect ratio of 55%.

Tires with an aspect ratio of 55 represent a category that balances performance with comfort, making them suitable for a wide range of vehicles. This tire width is particularly common in modern passenger cars, including sedans, coupes, crossovers and SUVs.

Tires with this aspect ratio offer a good compromise between the agile handling of lower profiles and the increased comfort of higher profiles. They are designed to meet the needs of drivers who want a blend of comfort, handling, and aesthetic appeal.

305/55R20 Rim Diameter

Rim diameter refers to the diameter of the wheel on which the tire is mounted, commonly measured in inches. 305/55R20 tire can be mounted on 20-inch wheels. The rim diameter directly correlates with the overall diameter of the tire and affects various aspects of vehicle performance and aesthetics.

Tires with rim diameter of 20 inches are equipped on a select crossover, minivan, passenger car, pickup truck, sport utility vehicle and van models.

20-inch rims are often used on high-end SUVs, light trucks, or high-performance sports cars. 20-inch rims are usually chosen for aesthetic reasons, or to accommodate larger, more robust tires needed for off-road or heavy-load conditions.

When selecting a rim diameter, it's crucial to consider the vehicle's design specifications, as altering the rim size can affect the speedometer and odometer calibration, vehicle handling, suspension geometry, and brake clearance.

Rim Diameter
20"

305/55R20 Tire Diameter / Height

Tire diameter represens the total height of a tire, including the rim, when it is fully inflated and not under load. 305/55R20 tire height is 844 millimeters or 33.2 inches.

Tire height affects the clearance between the tire and the vehicle's body or chassis, influences the vehicle's ground clearance, and can impact the accuracy of the vehicle's speedometer and odometer.

For standard passenger cars, tire diameters typically range from about 24 to 30 inches. This includes sedans, hatchbacks, small SUVs, and minivans. Light trucks and larger SUVs might have tires on the higher end of this range or slightly above, often between 29 to 33 inches. Sports cars and high-performance vehicles may have similar diameter ranges as standard passenger cars, but they often feature wider tires with a lower aspect ratio, which can slightly affect the overall diameter. The range for these vehicles is typically between 24 to 30 inches, focusing more on width and profile for performance. Off-road vehicles, including larger SUVs, trucks, and specialized vehicles, often have larger tire diameters to handle rough terrain better. The diameters for these vehicles can range from about 31 to 40 inches or more, depending on the level of off-road capability and customization.

Tire Diameter
33.2"

305/55R20 Sidewall Height

Tire sidewall height, determined by the aspect ratio of a tire, represents the height of the tire's sidewall, measured from the edge of the rim to the top of the tread. 305/55R20 tire sidewall is 168 millimeters or 6.6 inches tall.

Sidewall height affects the tire's ability to dissipate heat and impacts its load-bearing capacity. It also plays a role in aesthetic appeal for many drivers, influencing the overall look of the vehicle.

Tires with a sidewall height of 6.6" are considered high profile. Higher sidewall offers better ride comfort and is more forgiving on rough surfaces. These characteristics are desirable in off-road, utility vehicles, and everyday passenger cars, as the increased sidewall height provides better shock absorption and protection against potholes and other road imperfections

Sidewall Height
6.6"

305/55R20 Circumference

Tire circumference is the total distance around the outer edge of the tire. 305/55R20 tire has a circumference of 2650 millimeters or 104.2 inches.

Tires with a circumference of 104.2 inches are typically used on light trucks and SUVs, sports and performance cars. For trucks, the larger circumference is beneficial for off-road performance, providing greater traction and a smoother ride over rough terrain. The downside is often reduced fuel efficiency and potentially slower acceleration due to the larger size and weight of the tires. For sports and performance vehicls, the benefit here is enhanced grip and handling for high-speed driving, although ride comfort might be compromised due to the lower profile associated with these tires.

Tire circumference directly influences the speedometer and odometer readings of a vehicle. Mismatched tire circumferences, especially on the same axle, can lead to uneven wear, handling issues, and even mechanical damage, particularly in all-wheel or four-wheel-drive vehicles.

305/55R20 Circumference
Tire Circumference
104.2"

305/55R20 Revolutions

Tire revolutions metric reflects the number of times a tire rotates over a fixed distance. This figure is inherently tied to the tire's circumference - the larger the circumference, the fewer the revolutions needed to cover a mile, and vice versa. 305/55R20 tire makes 377 revolutions per kilometer or 608 revolutions per mile.

Number of the revolutions a tire makes affects greatly vehicle's performance, from speed and distance measurement accuracy to handling, fuel efficiency, and wear and tear.

Popular 305/55R20 tire models

Listed below are most affordable tire models available in 305/55R20 tire size.

Shop more 305/55R20 tires with tire finder.

What is 305/55R20 in inches?

When converted to inches, 305/55R20 tire size is equivalent to 33.2x12R20. 33.2 inches indicate the tire diameter, 12 inches represent tread width, and 20 inches is the diameter of a rim the tire can be mounted on.

Learn more about 305/55R20 in inches conversion.

305/55R20 Vehicle Fitment

No vehicles that are equipped with 305/55R20 OEM tire size have been found in our database.

What are replacement sizes for 305/55R20 tire?

305/55R20 alternative has to be within 3% of the original tire's overall diameter to ensure safe drive and proper speedometer readings. Below is a list of 305/55R20 equivalent and plus sizes that are within the optimal characteristics and dimensions of the orignal tire size.

Keep in mind that different vehicles have different tire requirements. Passenger cars, SUVs, trucks, and high-performance vehicles each have specific types of tires that are engineered for their particular needs. When replacing tires on your vehicle, always refer to your vehicle's owner's manual for manufacturer recommendations on tire size, type, and other specifications.

Replacement Tire Size Tire Diameter Difference
LT295/55R20 -1.3%
LT295/60R20 2.1%
LT305/55R20 0%
P295/55R20 -1.4%
305/45R22 -1.3%
LT295/50R22 1.2%
LT305/50R22 2.4%
LT315/45R22 -0.2%

305/55R20 Tire Size Comparison Chart

Below is a comparison chart where we compare 305/55R20 tire size with other popular sizes. Green indicates that new tire diameter is within the acceptable 3% of the original, while red warns that tire will adversely affect the vehicle's speedometer reading, handling characteristics, or clearance in the wheel well. We recommend to use the tire size comparison tool to ensure proper compatibility when switching to a new tire size.

Tire Size Comparison Tire Diameter Difference
305/55R20 vs LT305/55R20 0%
305/55R20 vs P245/50R20 -10.7%
305/55R20 vs P235/55R20 -9.2%
305/55R20 vs LT285/60R20 0.7%
305/55R20 vs LT275/65R20 2.6%
305/55R20 vs 305/35R20 -14.5%
305/55R20 vs 305/30R20 -18%
305/55R20 vs 295/45R20 -8.3%
305/55R20 vs 295/40R20 -11.8%
305/55R20 vs 285/50R20 -5.9%
305/55R20 vs 285/45R20 -9.5%
305/55R20 vs LT265/60R20 -2.1%
305/55R20 vs 285/40R20 -12.8%
305/55R20 vs 285/35R20 -16.1%
305/55R20 vs 285/30R20 -19.4%
305/55R20 vs 275/60R20 -0.7%
305/55R20 vs 275/55R20 -4%
305/55R20 vs 275/50R20 -7.1%
305/55R20 vs P255/45R20 -12.6%
305/55R20 vs P255/50R20 -9.5%
305/55R20 vs P275/55R20 -4%
305/55R20 vs LT295/65R20 5.7%
305/55R20 vs LT295/60R20 2.1%
305/55R20 vs LT295/55R20 -1.3%
305/55R20 vs LT285/65R20 4.1%
305/55R20 vs LT285/55R20 -2.6%
305/55R20 vs LT275/60R20 -0.7%
305/55R20 vs LT275/55R20 -3.9%
305/55R20 vs 305/50R20 -3.6%
305/55R20 vs 295/25R20 -22.3%
305/55R20 vs 245/60R20 -5%
305/55R20 vs 315/35R20 -13.7%
305/55R20 vs 315/30R20 -17.3%
305/55R20 vs 305/40R20 -10.9%
305/55R20 vs LT325/60R20 6.4%
305/55R20 vs 295/35R20 -15.4%
305/55R20 vs 295/30R20 -18.7%
305/55R20 vs P275/60R20 -0.7%
305/55R20 vs 275/45R20 -10.4%
305/55R20 vs 275/40R20 -13.7%
305/55R20 vs 215/45R20 -16.8%
305/55R20 vs 265/45R20 -11.6%
305/55R20 vs 255/40R20 -15.6%
305/55R20 vs 265/40R20 -14.7%
305/55R20 vs 245/45R20 -13.7%
305/55R20 vs 255/30R20 -21.6%
305/55R20 vs 245/50R20 -10.7%
305/55R20 vs 265/35R20 -17.8%
305/55R20 vs 255/35R20 -18.7%
305/55R20 vs 265/30R20 -20.9%
305/55R20 vs 255/60R20 -3.6%
305/55R20 vs 255/55R20 -6.6%
305/55R20 vs 255/50R20 -9.5%
305/55R20 vs 245/40R20 -16.6%
305/55R20 vs 275/35R20 -17.1%
305/55R20 vs 245/30R20 -22.3%
305/55R20 vs 235/50R20 -11.8%
305/55R20 vs 255/45R20 -12.6%
305/55R20 vs 275/30R20 -20.1%
305/55R20 vs 235/45R20 -14.7%
305/55R20 vs 235/40R20 -17.5%
305/55R20 vs 235/35R20 -20.4%
305/55R20 vs 245/35R20 -19.4%
305/55R20 vs 225/35R20 -21.1%
305/55R20 vs 265/50R20 -8.3%
305/55R20 vs 235/55R20 -9.2%
305/55R20 vs 255/35R21 -15.8%
305/55R20 vs 295/30R21 -15.8%
305/55R20 vs 285/30R21 -16.5%
305/55R20 vs 245/35R21 -16.5%
305/55R20 vs 265/35R21 -14.8%
305/55R20 vs 315/30R21 -14.3%
305/55R20 vs 245/40R21 -13.6%
305/55R20 vs 315/35R21 -10.8%
305/55R20 vs 325/30R21 -13.6%
305/55R20 vs 355/25R21 -15.8%
305/55R20 vs 305/30R21 -15%
305/55R20 vs 315/40R21 -7%
305/55R20 vs 255/40R21 -12.7%
305/55R20 vs 275/40R21 -10.8%
305/55R20 vs 275/45R21 -7.5%
305/55R20 vs 275/35R21 -14.1%
305/55R20 vs 275/50R21 -4.1%
305/55R20 vs 285/35R21 -13.2%
305/55R20 vs 265/45R21 -8.6%
305/55R20 vs 285/45R21 -6.5%
305/55R20 vs 265/40R21 -11.7%
305/55R20 vs 295/35R21 -12.4%
305/55R20 vs 255/50R21 -6.5%
305/55R20 vs 295/40R21 -8.9%
305/55R20 vs 275/30R21 -17.2%
305/55R20 vs 285/40R21 -9.8%
305/55R20 vs 295/30R22 -12.7%
305/55R20 vs LT285/50R22 0%
305/55R20 vs LT285/55R22 3.3%
305/55R20 vs 275/45R22 -4.4%
305/55R20 vs 315/30R22 -11.3%
305/55R20 vs 275/35R22 -11%
305/55R20 vs 275/40R22 -7.7%
305/55R20 vs LT325/50R22 4.7%
305/55R20 vs 275/50R22 -1.1%
305/55R20 vs 285/30R22 -13.4%
305/55R20 vs 285/45R22 -3.4%
305/55R20 vs 295/40R22 -5.8%
305/55R20 vs 265/40R22 -8.6%
305/55R20 vs 325/35R22 -6.8%
305/55R20 vs 285/40R22 -6.8%
305/55R20 vs 265/35R22 -11.7%
305/55R20 vs 255/30R22 -15.5%
305/55R20 vs 285/35R22 -10.1%
305/55R20 vs 305/40R22 -4.9%
305/55R20 vs 305/45R22 -1.3%
305/55R20 vs 295/25R22 -16.2%

All listed guides, data and/or calculations are for informational purposes only. TireSizes.com does not warrant or make any representations regarding the accuracy of or the results of the use of this information.