315/65r18 In Inches – Tire Size, Rim Fitment & Best Tires

The 315/65R18 tire has an overall diameter of approximately 34.6 inches, a section width of roughly 12.4 inches, and is designed to be mounted on an 18-inch diameter rim. The equivalent tire size in the high flotation system is 34.6×12.4R18.

What does 315/65r18 Tire mean?

Before we tackle the nitty-gritty of the actual dimensions, it’s worth taking a pit stop to understand what these numbers and letters actually mean. Here’s a table that breaks it down for you:

Tire numberIts Explanation
315This number indicates the tire’s section width, or the width of the tire from sidewall to sidewall in millimeters. So, 315 means the tire is 315 millimeters wide.
65This is the aspect ratio of the tire, or the ratio of the height of the tire’s cross-section to its width, expressed as a percentage. Therefore, the height of this tire is 65% of its width.
RThis indicates the construction of the tire, with “R” denoting a radial tire. This means the layers run radially across the tire.
18This is the diameter of the wheel (or rim) in inches. So, this tire is designed to fit on an 18-inch rim.

What is 315/65r18 Tire in inches?

315 65r18

So, now that we’ve got a grip on what those numbers and letters mean, let’s convert those measurements into inches (for our friends who prefer imperial measurements) and millimeters (for our metrically inclined pals).

Here’s the breakdown in both inches and millimeters:

Tire Diameter34.6 inches880 mm
Section Width12.4 inches315 mm
Rim Diameter18 inches457.2 mm
Sidewall Height8.1 inches204.75 mm
Circumference108.6 inches2758.4 mm
Revolutions per Mile584

Tire width of 315/65r18

First up on our exhilarating tire adventure is the tire width. Drumroll, please! The mighty 315/65r18 tire boasts a width of a whopping 315 millimeters (or 12.4 inches for our friends who prefer to measure in old-fashioned units). That’s wider than a sumo wrestler’s smile! This wide stance gives your vehicle a fierce look and provides excellent stability on the road.

Tire height of 315/65r18

Now, let’s talk about the height of this beastly tire. Standing tall and proud, the 315/65r18 tire has a height that’s 65% of its width. In other words, it’s like the tire is flexing its muscles and saying, “Look at me, I’m here to conquer the road!” With a height of approximately 8.1 inches (or 204.75 millimeters), this tire commands attention and ensures a comfortable ride with just the right amount of sidewall flex.

Sidewall height of 315/65r18

Speaking of sidewalls, let’s take a moment to appreciate the sidewall height of the 315/65r18 tire. This measurement refers to the distance between the rim and the outer edge of the tire. For this particular tire, the sidewall height comes in at approximately 8.1 inches (or 204.75 millimeters). That’s enough sidewall to give you a cushioned ride, absorbing those pesky potholes like a champ, while still maintaining that aggressive, rugged appearance.

Rim diameter for 315/65r18

Now, let’s shift gears and focus on the rim diameter that perfectly complements the 315/65r18 tire. Picture this: a stunning 18-inch rim that harmonizes with the tire’s proportions like a dance between Fred Astaire and Ginger Rogers. This ideal pairing not only enhances the tire’s performance but also adds a touch of style to your beloved ride. It’s a match made in tire heaven!

Tire circumference of 315/65r18

Last but certainly not least, let’s take a spin around the tire circumference. Clocking in at approximately 108.6 inches (or a mesmerizing 2758.4 millimeters), the 315/65r18 tire covers some serious ground. Just imagine the adventures you can embark on with each rotation of this mighty tire. It’s like having your own personal road-trip companion, whispering tales of excitement and exploration as you cruise along the highways and byways.

What vehicles use 315/65r18 Tire?

Picture this: You’re driving down the street, and suddenly, you see a beast of a vehicle rolling past, commanding attention with its burly presence. Chances are, that mighty machine is equipped with the 315/65r18 tire. This tire size is a popular choice among off-road enthusiasts, truck lovers, and anyone who wants to make a bold statement on the road. You’ll often find this tire adorning vehicles like trucks, SUVs, and even some larger crossover vehicles. So, if you crave power, performance, and a touch of rugged elegance, the 315/65r18 tire is your ticket to tire greatness.

How many revolutions per mile does a 315/65r18 have?

Revolutionary question, my friend! Now, let me drop some knowledge bombs for you. The 315/65r18 tire, with its impressive measurements, undergoes approximately 584 revolutions per mile. That’s right, with each mile you travel, this tire spins and whirls around like a rockstar on stage, embracing the road with an unrivaled rhythm. It’s like a dance party on wheels, and the 315/65r18 tire knows how to boogie!

Price of 315/65r18 inches Tire?

Ah, the sweet sound of budget considerations. When it comes to the price of the 315/65r18 tire, it’s essential to keep in mind that prices can vary depending on various factors, such as brand, tire model, and the retailer you choose. However, as a tire connoisseur, I can give you a rough estimate. On average, you can expect to find a set of 315/65r18 tires ranging from $250 to $400 per tire. Remember, my friends, quality and performance often come with a price tag, but investing in top-notch rubber for your ride is worth every hard-earned penny.

What kind of rim does a 315/65r18 tire fit on?

Imagine a tire that finds its perfect match in a rim, like a love story written in rubber and metal. The 315/65r18 tire is designed to fit on an 18-inch rim, to be precise. So, when it’s time to outfit your vehicle with this tire size, make sure you select a rim that measures 18 inches in diameter. It’s like finding the perfect partner in crime for your adventurous road escapades.

How much air should be in a 315/65r18?

Ah, the invisible but oh-so-important ingredient: air! Proper tire inflation is crucial for optimal performance, safety, and even fuel efficiency. Now, grab your tire pressure gauge, my friends, because the recommended air pressure for a 315/65r18 tire typically falls in the range of 35 to 40 PSI (pounds per square inch). But always remember to consult your vehicle’s manual or the tire manufacturer’s recommendations for the specific air pressure requirements for your vehicle and tire combination. Trust me, keeping those tires properly inflated will make your ride smoother than a baby’s bottom.

What is a 315/65r18 equivalent to?

You may be wondering, “Is there a tire out there that’s like the 315/65r18 but with a different name?” Well, my inquisitive friends, you’re in luck! The 315/65r18 tire size has an equivalent tire size that goes by the name of 35×12.50r18. It’s like having an alter ego or a secret identity, but in the tire world. So, if you stumble upon this mysterious 35×12.50r18 tire size, fear not! It’s just another way of referring to the mighty 315/65r18.

Comparison with Similar Tires

Ah, the moment we’ve all been waiting for! Let’s dive into a thrilling comparison of the 315/65r18 tire with its tire brethren. Buckle up, my friends, because this is where the rubber truly meets the road.

315/65r18 vs. 305/70r18: Battle of the Titans

In one corner, we have the 315/65r18 tire, with its impressive width and height, ready to conquer any terrain. And in the other corner, we have the 305/70r18 tire, known for its rugged prowess and all-terrain capabilities. It’s a showdown between two mighty contenders.

The 315/65r18 tire boasts a wider footprint, providing excellent stability and grip on both paved roads and off-road trails. Its sidewall height offers a balance between comfort and toughness, absorbing those bumps and potholes with ease. On the other hand, the 305/70r18 tire brings its own set of strengths to the table. With a slightly taller sidewall and a rugged tread pattern, it’s designed to tackle challenging terrains while maintaining good on-road performance.

When it comes to the ultimate winner in this clash of the titans, it really depends on your specific needs and preferences. If you prioritize a wider footprint and stability, the 315/65r18 is the tire for you. But if you crave all-terrain capabilities and a rugged design, the 305/70r18 might be your perfect match. It’s like choosing between chocolate and vanilla ice cream—both are delicious, but it ultimately comes down to personal taste.

315/65r18 vs. 35×12.50r18: The Alter Egos

Here we have a battle of tire alter egos. On one side, we have the 315/65r18 tire, with its wide stance and commanding presence. And on the other side, we have the 35×12.50r18 tire, a name that rolls off the tongue like a secret code for tire enthusiasts.

In reality, the 315/65r18 and the 35×12.50r18 are essentially the same tire size. They share the same width, height, and rim diameter. It’s like discovering that your favorite superhero has a secret identity. So, whether you prefer the 315/65r18 or the 35×12.50r18, rest assured that you’re getting the same beastly tire with a different name.


After an exhilarating ride through the world of the 315/65r18 tire, it’s time to wrap up our tire odyssey with a simple and straightforward conclusion. If you’re looking for a tire that combines power, performance, and a touch of rugged elegance, the 315/65r18 is an excellent choice. Its wide footprint provides stability and grip, while the balanced sidewall height offers a comfortable and controlled ride. This tire size is beloved by off-road enthusiasts and truck lovers alike, and it’s sure to make a bold statement on the road.

However, it’s important to consider your specific needs and preferences when selecting the perfect tire. If you require all-terrain capabilities and a more aggressive tread pattern, exploring other options such as the 305/70r18 might be worth considering.

Remember, my fellow road warriors, tires are more than just rubber and numbers—they are an essential part of your driving experience. So choose wisely, embrace the power of the 315/65r18 tire, and hit the road with confidence and style. Safe travels, my friends!