The 305/70R18 tire has an overall diameter of approximately 35.1 inches, a section width of roughly 12 inches, and is designed to be mounted on an 18-inch diameter rim. The equivalent tire size in the high flotation system is 35.1x12R18.
What does 305/70r18 Tire mean?
Let’s begin by decoding the mystic tire code – 305/70r18. In the world of tires, numbers are not just numbers; they’re a size guide, a fitment manual, and a compatibility chart rolled into one. The table below details what each number and letter stands for in the tire code.
| Tire Number | Its Explanation |
| 305 | This is the tire’s section width, the measurement of the tire from one sidewall to the other, in millimeters. For our case, the width is 305mm. |
| 70 | The two-digit number following the slash is the aspect ratio. It’s the height of the tire’s sidewall as a percentage of the section width. Here, it’s 70%, meaning the height is 70% of 305mm. |
| R | The ‘R’ stands for Radial, which means the layers of the tire run radially across the tire. Almost all modern tires are radial tires. |
| 18 | Lastly, the number ’18’ is the wheel diameter in inches. This tire fits an 18-inch wheel. |
What is 305/70r18 Tire in Inches?
Armed with the knowledge of what each digit in 305/70r18 stands for, let’s translate these measurements into inches, the unit often more familiar to the folks who aren’t as big on the metric system. We’ll also include the millimeters for the metrically-minded.
We’re calculating these based on the following tire specs:
- Diameter: This is the total diameter of the tire. It’s calculated by adding the height of two sidewalls to the diameter of the rim.
- Section Width: This is the distance from one sidewall of the tire to the other.
- Rim Height: This is the height of the rim, from one edge to the other.
- Sidewall Height: This is the height of the sidewall, calculated by taking the aspect ratio of the section width.
- Circumference: The total distance around the tire, calculated by multiplying the diameter by pi (π).
- Revolutions: The number of times the tire will revolve in one mile (or one kilometer), calculated by dividing the distance in a mile (or kilometer) by the tire’s circumference.
So let’s get down to it, shall we? Here’s your 305/70r18 tire size translated into inches and millimeters:
| Measurement | Inches | Millimeters |
| Tire Diameter | 34.81 | 884 |
| Section Width | 12.01 | 305 |
| Rim Height | 18 | 457.2 |
| Sidewall Height | 8.40 | 213.5 |
| Circumference | 109.34 | 2777.5 |
| Revolutions | 579 /mile | 360 /km |
That’s a lot of numbers, isn’t it? But hey, remember, you are not alone. Even Sherlock Holmes would take a moment to absorb all of these numbers. But just like him, you are now equipped to make a sound decision when choosing the perfect set of 305/70r18 tires for your vehicle. Knowledge is power, after all, and you, my friend, are now wielding the power of tire numbers!
A Deeper Dive into the 305/70r18 Tire Specifications
Now that we’ve cracked the code of 305/70r18 and understood its basic meaning, let’s take a deeper dive into the fascinating world of this tire size. Get ready to be amazed, because we’re about to unleash some mind-blowing facts and figures!
Tire Width of 305/70r18
The tire width of 305/70r18 is a beastly 305 millimeters or approximately 12.01 inches. That’s wider than a hippopotamus’s yawn! With such a substantial width, your vehicle will have an imposing stance, gripping the road with confidence and stability. So say goodbye to those wimpy tires and embrace the wide-bodied awesomeness!
Tire Height of 305/70r18
When it comes to tire height, the 305/70r18 stands tall and proud. Its height is determined by the aspect ratio, which in this case is 70%. The sidewall height of this tire is approximately 8.40 inches or 213.5 millimeters. That’s like having stilts for your vehicle, giving it an extra boost and making it look ready to conquer any terrain. Just imagine your car strutting around like a confident giraffe in the savannah!
Sidewall Height of 305/70r18
The sidewall height is a crucial aspect of tire specifications. It not only affects the tire’s performance but also contributes to its overall look. For the 305/70r18 tire, the sidewall height is approximately 70% of the tire’s width, resulting in the aforementioned 8.40 inches or 213.5 millimeters. With a sidewall height like that, your tire will have a perfect balance of durability and flexibility, allowing it to absorb bumps and potholes like a champion.
Rim Diameter for 305/70r18
Now, let’s talk about the rim diameter for the 305/70r18 tire. It’s like the wheel’s happy birthday! The “18” in 305/70r18 refers to the rim diameter, which means this tire is specifically designed to fit an 18-inch wheel. So, if you have a thing for those 18-inch rims, congratulations! You’ve found the perfect tire size to complement your stylish wheels.
Tire Circumference of 305/70r18
Ah, the circumference! It’s like the tire’s never-ending hug around the rim. For the 305/70r18 tire, the circumference measures approximately 109.34 inches or 2777.5 millimeters. Just imagine your tire making 109.34 inches of contact with the ground as it rolls forward. It’s like a tire-sized dance move that leaves a lasting impression on the road. So, get ready to leave your tire’s signature mark wherever you go!
What are the Best 305/70r18 Tires?
When it comes to selecting the perfect set of tires for your mighty 305/70r18 setup, you want nothing but the best. After all, tires are the shoes of your vehicle, and you wouldn’t want to walk around in uncomfortable, ill-fitting shoes, right? Fear not, dear reader, for I have meticulously researched and handpicked the top contenders in the 305/70r18 tire category. So, without further ado, let’s unveil the cream of the crop!
1. NITTO RECON GRAPPLER A/T LT305/70R18 120/117R D BW
Description: The NITTO RECON GRAPPLER A/T is the embodiment of versatility and off-road prowess. It combines the aggressive looks of a mud-terrain tire with the comfort and quietness of an all-terrain tire. This tire is engineered to conquer any terrain, be it rocks, mud, or highways, without compromising performance or comfort.
Key Features:
- Aggressive tread design for superior off-road traction
- Durable construction for enhanced puncture resistance
- Excellent grip and stability on various surfaces
- Quiet and comfortable on-road performance
Pros:
- Impressive off-road capabilities
- Comfortable and quiet for daily driving
- Enhanced puncture resistance for added durability
Cons:
- Slightly higher price point
- Reduced fuel efficiency compared to standard highway tires
Final Recommendation: If you’re an adventurous soul who craves off-road thrills without sacrificing on-road comfort, the NITTO RECON GRAPPLER A/T is the perfect tire for you. It strikes the perfect balance between off-road performance and everyday drivability.
2. Mastercraft Courser MXT Mud Terrain Radial Tire – 305/70R18 126Q
Description: The Mastercraft Courser MXT is a tire that means serious business. Designed specifically for mud and off-road enthusiasts, this tire features an aggressive tread pattern that chews through mud and tackles tough terrains with ease. It offers exceptional traction, durability, and a menacing appearance that commands attention on and off the road.
Key Features:
- Aggressive sidewall and tread design for maximum traction
- Enhanced off-road durability and resistance to damage
- Self-cleaning tread for continuous traction in muddy conditions
- Quiet and comfortable highway performance
Pros:
- Unmatched off-road traction and durability
- Good balance of on-road comfort and performance
- Reasonably priced for its capabilities
Cons:
- Slightly compromised fuel efficiency on highways
- Tread may wear faster on pavement compared to all-terrain tires
Final Recommendation: If you’re a mud-loving, trail-conquering daredevil, the Mastercraft Courser MXT is the tire that will keep you smiling through the muck. It’s a true off-road warrior that won’t let you down when the going gets tough.
3. Cooper Discoverer STT Pro All-Season LT305/70R18 126/123Q Tire
Description: The Cooper Discoverer STT Pro is an all-season tire built for those who demand top-tier off-road performance without sacrificing on-road manners. With its aggressive tread pattern and advanced technology, this tire excels in mud, rocks, and other challenging terrains. It offers excellent traction, durability, and a confident grip on both wet and dry surfaces.
Key Features:
- Armor-Tek3 construction for enhanced durability and puncture resistance
- Aggressive tread design with large, biting lugs for superior off-road traction
- Enhanced sidewall protection against cuts and abrasions
- Quiet and comfortable on-road performance
Pros:
- Exceptional off-road traction and durability
- Good on-road manners and noise levels
- High resistance to punctures and sidewall damage
Cons:
- Slightly higher price point
- Marginally reduced fuel efficiency compared to highway tires
Final Recommendation: The Cooper Discoverer STT Pro is a tire that’s built to tackle the toughest challenges with confidence. If you’re seeking a tire that seamlessly transitions between off-road adventures and daily driving, look no further than this off-road beast.
4. YOKOHAMA LT305/70R18 126/123Q E/10 GEOLANDAR X-AT RBL
Description: The YOKOHAMA GEOLANDAR X-AT is a tire that embodies versatility and durability. It’s designed to excel both on and off the road, offering excellent traction, durability, and a comfortable ride. With its aggressive tread pattern and advanced technology, this tire provides confidence in challenging terrains while maintaining exceptional on-road performance.
Key Features:
- Aggressive tread design for enhanced off-road traction
- Reinforced sidewalls for increased durability and resistance to damage
- Excellent wet and dry traction for confident driving in any condition
- Low road noise and comfortable ride quality
Pros:
- Reliable off-road performance and traction
- Impressive on-road comfort and handling
- Enhanced durability for extended tire life
Cons:
- Slightly higher price point
- Slight compromise in fuel efficiency compared to standard highway tires
Final Recommendation: If you desire a tire that strikes a perfect balance between off-road capability and on-road comfort, the YOKOHAMA GEOLANDAR X-AT is an excellent choice. It’s a tire that won’t back down from any challenge while keeping you comfortable on your daily journeys.
5. Thunderer Trac Grip M/T R408 All-Season Radial Tire – 305/70R18 127Q
Description: The Thunderer Trac Grip M/T R408 is a tire that knows no limits. Engineered for the most demanding off-road enthusiasts, it features an aggressive tread pattern that provides exceptional traction in mud, rocks, and other extreme terrains. This tire is built to endure the harshest conditions while delivering impressive on-road performance.
Key Features:
- Deep and aggressive tread design for superior off-road traction
- Reinforced sidewalls for enhanced durability and protection against cuts and punctures
- Excellent water evacuation for improved wet traction
- Surprisingly quiet and comfortable for an aggressive mud-terrain tire
Pros:
- Outstanding off-road traction and durability
- Good on-road performance and comfort
- Affordable price point for a mud-terrain tire
Cons:
- Slightly reduced fuel efficiency compared to highway tires
- Treadwear may be faster on pavement due to the aggressive nature of the tire
Final Recommendation: If you’re seeking a tire that thrives in extreme off-road conditions while still offering decent on-road manners, the Thunderer Trac Grip M/T R408 is a fantastic choice. It’s an off-road beast that won’t let you down when the going gets tough, without compromising your comfort on everyday roads.
FAQ’s About 305/70r18 Tire
As tire aficionados, we understand that you may have burning questions about the magnificent 305/70r18 tire. Fear not, for we’ve gathered the most frequently asked questions about this tire size and are ready to provide you with expert answers. Buckle up, folks, because we’re about to embark on a tire-filled adventure!
Q: What vehicles use 305/70r18 Tire?
A: The 305/70r18 tire size is a popular choice among enthusiasts of trucks, SUVs, and off-road vehicles. It’s often found on vehicles like the Ford F-150, Chevrolet Silverado, Jeep Wrangler, Toyota Tundra, and many others. If you’re looking to equip your rugged beast with some formidable shoes, the 305/70r18 tire size has got you covered.
Q: How many revolutions per mile does a 305/70r18 have?
A: The number of revolutions per mile for a 305/70r18 tire can vary slightly depending on the tire’s design and the vehicle’s weight, but on average, it completes around 579 revolutions per mile. That’s like the tire doing a little victory dance for every mile you drive!
Q: What is the price of a 305/70r18 tire?
A: Ah, the million-dollar question! Well, not quite a million, but the price of a 305/70r18 tire can vary based on factors such as brand, tire type, and specific features. On average, you can expect to invest anywhere from $200 to $400 per tire. Remember, tires are an investment in safety and performance, so it’s worth splurging a bit to ensure you’re getting a quality set.
Q: What kind of rim does a 305/70r18 tire fit on?
A: The 305/70r18 tire is designed to fit on an 18-inch rim. Specifically, it requires a rim with an 18-inch diameter. So if you’re planning to pair these tires with some shiny new rims, make sure they’re 18-inchers to ensure a snug and secure fit.
Q: How much air should be in a 305/70r18 tire?
A: Proper tire inflation is crucial for optimal performance and safety. For a 305/70r18 tire, the recommended tire pressure can vary depending on the vehicle manufacturer’s specifications. However, a general guideline is to maintain the tire pressure within the range of 35-40 PSI (pounds per square inch). Always refer to the vehicle owner’s manual or the tire manufacturer’s recommendations for the most accurate tire pressure information.
Q: What is a 305/70r18 equivalent to?
A: If you’re looking for an equivalent tire size to the 305/70r18, you might come across the metric size 33×12.00R18. It’s important to note that while the overall diameter and width are similar, the aspect ratio and load index may differ. It’s always recommended to consult with a tire professional or refer to the vehicle’s manufacturer guidelines to ensure the proper tire size and specifications for your vehicle.
Comparison with Similar Tires
When it comes to tire sizes, it’s natural to wonder how different options stack up against each other. To satisfy your curiosity, we’ve conducted a head-to-head comparison between the mighty 305/70r18 tire and a range of similar sizes. Buckle up, because we’re about to embark on a tire showdown like no other!
305/70r18 vs 295/70r18
The 305/70r18 tire boasts a slightly wider section width compared to the 295/70r18. This means the 305/70r18 provides a bit more road contact and stability. However, both sizes offer similar overall diameters, so you can expect comparable performance in terms of ground clearance and off-road capabilities.
305/70r18 vs 285/75r18
In this matchup, the 305/70r18 takes the lead with a wider section width, providing enhanced stability and grip on the road. On the other hand, the 285/75r18 offers a taller sidewall, which can provide a smoother ride and additional cushioning against bumps. It’s a trade-off between stability and comfort.
305/70r18 vs 35/12.5r18
The 305/70r18 and the 35/12.5r18 are quite similar in terms of section width and overall diameter. Both sizes offer excellent off-road performance and a commanding presence on the road. However, the 35/12.5r18 has a slightly taller sidewall, which can provide a more cushioned ride. It’s a neck-and-neck competition!
305/70r18 vs 315/70r18
In this matchup, the 315/70r18 takes the crown for having a wider section width compared to the 305/70r18. This translates to improved stability and traction on various surfaces. However, both sizes offer similar overall diameters, so the difference in performance might not be too significant.
305/70r18 vs 33×12.5r18
The 305/70r18 and the 33×12.5r18 are very close in terms of overall diameter, making them quite comparable in terms of ground clearance and off-road capabilities. However, the 33×12.5r18 has a slightly narrower section width, which can impact stability and grip. It’s a trade-off between width and clearance!
305/70r18 vs 285/70r18
Both the 305/70r18 and the 285/70r18 offer similar section widths and overall diameters. They provide comparable stability, traction, and ground clearance. You can’t go wrong with either choice, so it comes down to personal preference and specific vehicle requirements.
305/70r18 vs 275/70r18
In this matchup, the 305/70r18 wins with a wider section width, providing better stability and grip on the road. The 275/70r18, on the other hand, may offer a slightly smoother ride due to its taller sidewall. It’s a balance between stability and comfort, so choose based on your priorities.
305/70r18 vs 305/60r18
The 305/70r18 and the 305/60r18 have different aspect ratios, resulting in distinct sidewall heights. The 305/70r18 has a taller sidewall, providing a cushioned ride and enhanced off-road capabilities. The 305/60r18, with its lower sidewall, offers a sportier look and improved handling on paved surfaces. Choose based on your desired balance between style and performance.
305/70r18 vs 315/70r17
While both the 305/70r18 and the 315/70r17 offer excellent off-road capabilities, the 315/70r17 takes the lead with a wider section width, providing enhanced stability and grip. However, the 305/70r18 has a larger rim diameter, which can accommodate larger brake components. It’s a trade-off between width and rim fitment.
305/65r18 vs 33×12.50r18
The 305/65r18 and the 33×12.50r18 are similar in overall diameter, offering comparable ground clearance and off-road capabilities. The 305/65r18 has a slightly narrower section width, which can impact stability and grip. Ultimately, the choice comes down to personal preference and specific vehicle requirements.
Conclusion
After a thorough examination of the 305/70r18 tire and its comparisons with similar sizes, it’s clear that the 305/70r18 offers an excellent balance of width, diameter, and performance. With its impressive stability, traction, and off-road capabilities, it’s a tire size that’s hard to beat. Whether you’re conquering the trails or cruising on the highway, the 305/70r18 is a versatile and dependable choice.
So, don’t hesitate! Equip your vehicle with the mighty 305/70r18 tires and get ready to embrace the road with confidence and style. Remember, tires are the foundation of your driving experience, so choose wisely and enjoy the thrilling journeys that await you!
AR Jeet has been a tire mechanic for over 2years. He has worked on all types of vehicles, from cars and trucks to RVs and ATVs and motorcycles. He has seen it all when it comes to tires, and he knows how to fix them.
AR Jeet is a tire expert, and he is passionate about his work. He loves to help people keep their vehicles running smoothly, and he is always happy to answer any questions that people have about their tires.
If you need help with your tires, or if you just want to learn more about them, then AR Jeet is the man to talk to. He will be happy to help you out, and he will make sure that you get the best possible solution.
He has a blog [Tirespick.com] where he writes about all things tire-related, and he is always happy to help people with their tire needs. Know more about AR Jeet.
