Tire Size 315/30r18 in inches

Tire size 315/30R18 equals 25.4×12.4R18 in inches. It has a diameter of 25.4 inches (646.2 mm), a section width of 12.4 inches (315 mm), a wheel diameter of 18 inches (457 mm), and is approved to be mounted on 10.5-11.5 inches (266.7 – 292.1 mm) wide wheels. This tire size is a crucial player in the high-performance automobile market, owing to its expansive dimensions and fitment characteristics that can handle powerful vehicles with aplomb.

315/30r18 in inches

This Table chart offers a comprehensive presentation of measurements in both inches and millimeters, promoting immediate understanding.

Feature Inches Metric
Tire Diameter 25.4 646.2
Section Width 12.4 315
Rim Height 18 457
Sidewall Height 3.7 94.5
Circumference 79.9 2030.1
Revolutions 492 per km 791 per mile
Rim Width Range 10.5-11.5 266.7 – 292.1

How Tall Is A 315/30R18 Tire?

The Tire Height of the 315/30R18 tire size is 25.4 inches, translating to 646.2 mm. This substantial size allows the tire to traverse challenging terrain relatively easily, effectively absorbing impacts and promoting superior handling in various road conditions.

What Is the 315/30R18 Width In Inches?

The tread width of the 315/30R18 tire size is a generous 12.4 inches or 315 mm. Such a wide tread profile enhances the tire’s road grip, making it suitable for performance-driven applications where maintaining contact with the road surface is crucial for safety and effective power transfer.

What Is the 315/30R18 Sidewall Height?

The 315/30R18 tire’s sidewall height is 3.7 inches or 94.5 mm. The relatively low profile sidewall contributes to the tire’s performance capabilities, providing less flex and more responsive handling, which is important for sport and high-performance applications.

What Is the 315/30R18 Tire Circumference?

The circumference of the 315/30R18 tire size is about 79.9 inches, which converts to approximately 2030.1 mm. This is a key measurement that can impact your vehicle’s speedometer accuracy, fuel economy, and overall driving performance.

What Is the 315/30R18 Revolutions Per Mile?

For the 315/30R18 tire size, there are approximately 791 revolutions per mile or 492 revolutions per kilometer. This is useful information when considering how well this tire size might contribute to your vehicle’s fuel efficiency.

What Is the 315/30R18 Rims Size?

The 315/30R18 tire size, the rim diameter is 18 inches or 457 mm. Moreover, this tire size is suitable to be mounted on rims with widths ranging from 10.5 to 11.5 inches (266.7 – 292.1 mm). Such a wide range allows flexibility in choosing the appropriate wheel to support this tire size.

Fitment Guide
This table will guide you on which vehicle models are compatible with the 315/30R18 tire size. Given the high-performance nature of this tire size, it often finds its fitment in sports cars, performance sedans, and some high-performance SUVs.

Brand Model
Dodge Viper [2003-2006]
Porsche 911 [1999-2006]

Replacement Tire Size
Replacement tires have to be within 3% of the total diameter of your original tire. It’s crucial to consult with a tire specialist or your vehicle’s manufacturer to confirm the best suitable replacement size.

Tire Size Overall Diameter Difference
285/30R18 24.8″ (629 mm) -2.8%
215/40R18 24.8″ (629 mm) -2.8%
245/35R18 24.8″ (629 mm) -2.8%
125/70R18 24.9″ (633 mm) -2.2%
255/35R18 25″ (635 mm) -1.9%
295/30R18 25″ (635 mm) -1.9%
225/40R18 25.1″ (637 mm) -1.5%
205/45R18 25.2″ (641 mm) -0.9%
305/30R18 25.2″ (641 mm) -0.9%
265/35R18 25.3″ (643 mm) -0.6%
155/60R18 25.3″ (643 mm) -0.6%
145/65R18 25.4″ (645 mm) -0.3%
235/40R18 25.4″ (645 mm) -0.3%
135/70R18 25.5″ (647 mm) 0%
275/35R18 25.6″ (649 mm) 0.3%
215/45R18 25.6″ (651 mm) 0.6%
245/40R18 25.7″ (653 mm) 0.9%
285/35R18 25.9″ (657 mm) 1.5%
225/45R18 25.9″ (659 mm) 1.9%
335/30R18 25.9″ (659 mm) 1.9%
145/70R18 26″ (661 mm) 2.2%
185/55R18 26″ (661 mm) 2.2%
255/40R18 26″ (661 mm) 2.2%
295/35R18 26.1″ (663 mm) 2.5%
205/50R18 26.1″ (663 mm) 2.5%
345/30R18 26.2″ (665 mm) 2.8%

Our Observation
The 315/30R18 tire size perfectly blends performance and aesthetic appeal. The wide tread and larger diameter provide excellent road grip and handling characteristics, making it a preferred choice for high-performance and luxury vehicle models. However, it may only be suitable for some types of cars due to its larger dimensions and fitment requirements.

Leave a Comment

Your email address will not be published. Required fields are marked *

Scroll to Top