Tire Size 315/30r20 in inches

The tire size 315/30R20 is equivalent to 27.4×12.4R20 in inches and has a diameter of 27.4 inches, a section width of 12.4 inches, a wheel diameter of 20 inches, and is approved to be mounted on 10.5 – 11.5 inches wide wheels. This tire size is widely preferred for its excellent performance capabilities and dynamic fitment range.

315/30r20 in inches

Gain a comprehensive understanding of inches and millimeters with the help of this Table chart.

FeatureInchesMetric
Tire Diameter27.4697
Section Width12.4315
Rim Height20508
Sidewall Height3.794.5
Circumference86.22189.7
Revolutions456 per km733 per mile
Rim Width Range10.5-11.5266.7 – 292.1

How Tall Is A 315/30R20 Tire?

The Tire Height of the 315/30R20 tire size is 27.4 inches or 697 millimeters. This overall diameter refers to the total height of the tire when properly inflated and not under load. The tire’s height can impact factors such as ride comfort, fuel economy, and capacity to handle heavy loads.

What Is the 315/30R20 Width In Inches?

The tread width of the 315/30R20 tire size is approximately 12.4 inches, equivalent to 315 millimeters. The width is the distance from one side of the tire’s tread to the other. A wider tread width often means enhanced grip and handling, especially in wet conditions or at high speeds.

What Is the 315/30R20 Sidewall Height?

The sidewall height of the 315/30R20 tire size is about 3.7 inches, which translates to 94.5 millimeters. The sidewall height, or aspect ratio, is a percentage of the tire’s width; in this case, it is 30% of 315mm. The sidewall height can affect ride quality, with shorter sidewalls typically providing a stiffer but more responsive ride.

What Is the 315/30R20 Tire Circumference?

The circumference of the 315/30R20 tire size is approximately 86.2 inches or 2189.7 millimeters. The circumference, or the distance around the tire, is crucial in determining the tire’s revolutions per mile and impacts factors like speedometer accuracy.

What Is the 315/30R20 Revolutions Per Mile?

For the 315/30R20 tire size, there are about 733 revolutions per mile. This measure indicates how many times the tire will rotate in one mile. Lower revolutions per mile mean a larger circumference and could impact speedometer readings and fuel efficiency.

What Is the 315/30R20 Rims Size?

The 315/30R20 tire size, the rim diameter is 20 inches or 508 millimeters. This tire size is approved to be mounted on rims with a width ranging between 10.5 – 11.5 inches, which is equivalent to 266.7 – 292.1 millimeters.

Fitment Guide
This table will guide you on which vehicle the 315/30R20 tire size fits. Various high-performance cars and luxury SUVs, especially from brands such as Ferrari, Ford, McLaren, Mercedes-Benz, and Porsche, typically use these tires. Refer to your vehicle’s manual or consult a tire expert for specific fitment information.

Brand NameModel
FerrariSF90 Spider [2020-2022], SF90 Stradale [2019-2022]
FordMustang [2020-2023], Mustang Shelby GT500 [2020-2023]
McLarenP1 [2013-2016], Senna [2018-2021]
Mercedes-BenzAMG GT 4 [2018-2023]
Porsche911 [2014-2019]

Replacement Tire Size
Replacement tires have to be within 3% of the diameter of the original tire size to ensure safety and compatibility. Therefore, if you’re considering replacing your 315/30R20 tire size, make sure the diameter of the new tire is within 0.822 inches or 20.9 mm.

Tire SizeOverall DiameterDifference
295/30R2027.0″-1.70%
255/35R2027.0″-1.70%
225/40R2027.1″-1.40%
305/30R2027.2″-0.90%
265/35R2027.3″-0.60%
155/60R2027.3″-0.60%
235/40R2027.4″-0.30%
145/65R2027.4″-0.30%
175/55R2027.6″0.30%
275/35R2027.6″0.30%
215/45R2027.6″0.60%
245/40R2027.7″0.90%
325/30R2027.7″0.90%
195/50R2027.7″0.90%
165/60R2027.8″1.10%
285/35R2027.9″1.40%
335/30R2028.0″1.70%
225/45R2028.0″1.70%
155/65R2028.0″1.70%

Our Observation
The 315/30R20 tire size, with its wide tread width and relatively low aspect ratio, is ideal for drivers looking for superior handling and grip, especially at high speeds or during cornering.

However, the reduced sidewall height might contribute to a stiffer ride, which might need to be more comfortable on uneven surfaces.

Additionally, its large diameter might require careful consideration for fitment. Nevertheless, this tire size is a popular choice among performance vehicles and luxury cars, balancing performance, aesthetics, and handling characteristics.

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