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275/70R18 Tire Size
All You Need To Know About 275/70R18 Tires
A 275/70R18 tire means it has a section width of 275 millimeters, an aspect ratio of 70%, and radial construction designed for an 18-inch wheel. In standard inches, this size converts to a tire that is roughly 33.2 inches tall and 10.8 inches wide.
Before buying, drivers should compare the 275/70R18 size against popular alternatives to ensure the right fit. For example, the 275/65R18 is a common stock size that is about 1 inch shorter, while the 285/65R18 offers a wider footprint but slightly less ground clearance. Researching these differences helps ensure you get the perfect balance of height and width for your truck.
Recommended 275/70R18 Tires
Best All season 275 70r18 tires: Kumho Crugen HT51, Hercules Terra Trac Cross-V AW, Nexen Roadian HTX 2
Best 275/70R18 All Terrain tires: Falken Wildpeak A/T4W, Yokohama Geolandar A/T4, Toyo Open Country A/T III
What Are The Dimensions of 275/70R18 Tires in Inches?
275/70R18 tires have a section width of 10.83" (≈ 10.8"), a sidewall height of 7.58" (≈ 7.6"), and a wheel diameter of 18 inches. The overall tire diameter is 33.16" (≈ 33.2"), the circumference is 104.16" (≈ 104.2"), and the recommended rim width range is 7.0 to 9.0 inches.
In inches, the 275/70R18 tire size can be represented as 33.2" × 10.8" R18. In the truck world, this size is considered a "33-inch tire", even though it's technically a fraction taller than a standard 33x12.50.
How tall in inches is a 275 70 18?
A 275/70R18 tire is approximately 33.2 inches tall.
275/70R18 tire size in millimeters and inches is presented in the table below:
275/70R18 Tire Size Dimensions | 275/70R18 Tire Size Dimensions in Inches (") | Formula to Convert 275/70R18 Size in Inches (") |
275 mm (section width) | 10.83" (≈ 10.8") | 275 ÷ 25.4 = 10.83 |
192.50 mm (sidewall height) | 7.58" (≈ 7.6") | (275 × 0.70) ÷ 25.4 = 7.58 |
18 (rim diameter) | 18" | Given |
842.20 mm (overall diameter) | 33.16" (≈ 33.2") | (2 × 192.50 ÷ 25.4) + 18 = 33.16 |
2646.16 mm (circumference) | 104.16" (≈ 104.2") | 33.16 × 3.1416 = 104.16 |
421.10 mm (radius) | 16.58" (≈ 16.6") | 33.16 ÷ 2 = 16.58 |
Comparison of 275/70R18 With Similar Tire Sizes
Compare 275/70R18 with other tire sizes, such as 285/65R18 and 275/65R18, to learn the key differences between them and make the right choice when buying new tires.
What Is The Difference Between 275/70R18 vs 285/65R18?
The main differences between 275/70R18 and 285/65R18 are the footprint width and the total height. The 275/70R18 tire is 0.39" (10 mm) narrower, but its higher aspect ratio provides a 0.28" taller sidewall. This results in an overall diameter of 33.16", making it 0.57" taller than the 285/65R18.
Summary Table comparing 275/70R18 and 285/65R18 tire sizes:
Tire dimensions | 275/70R18 dimensions in mm and inches (") | 285/65R18 dimensions in mm and inches (") | Difference in mm and inches (") | Percentage ≈ difference |
Section Width | 275 mm (≈ 10.83") | 285 mm (≈ 11.22") | 10 mm (≈ 0.39") | ≈ 3.6% |
Sidewall Height | 192.50 mm (≈ 7.58") | 185.25 mm (≈ 7.29") | 7.25 mm (≈ 0.29") | ≈ 3.9% |
Overall Diameter | 842.20 mm (≈ 33.16") | 831.20 mm (≈ 32.94") | 11.00 mm (≈ 0.43") | ≈ 1.3% |
Circumference | 2646.16 mm (≈ 104.16") | 2611.62 mm (≈ 102.82") | 34.54 mm (≈ 1.36") | ≈ 1.3% |
Radius | 421.10 mm (≈ 16.58") | 415.60 mm (≈ 16.36") | 5.50 mm (≈ 0.22") | ≈ 1.3% |
Rim Diameter | 457.2 mm (18.00") | 457.2 mm (18.00") | - | - |
Rim width range | 7.0’’–9.0’’ | 8.0’’–10.0’’ | - | - |
Can I use 285/65R18 instead of 275/70R18?
Yes, using a 285/65R18 instead of a 275/70R18 is acceptable. The overall diameter decreases by approximately 1.7%, which is well within the industry-standard ±3% tolerance for safe replacement. While this swap is safe, keep in mind that the 285/65R18 will provide a slightly wider footprint for stability and a marginally firmer ride due to the shorter sidewall profile.
What Is The Difference Between 275/70R18 vs 275/65R18?
The main difference between 275/70R18 and 275/65R18 is the sidewall height. The 275/70R18 tire has a 0.54" (≈ 13.75 mm) taller sidewall, resulting in a 1.08" (≈ 27.50 mm) larger overall diameter compared to the 275/65R18 size.
Summary Table comparing 275/70R18 and 275/65R18 tire sizes:
Tire dimensions | 275/70R18 dimensions in mm and inches (") | 275/65R18 dimensions in mm and inches (") | Difference in mm and inches (") | Percentage ≈ difference |
Section Width | 275 mm (≈ 10.83") | 275 mm (≈ 10.83") | - | - |
Sidewall Height | 192.50 mm (≈ 7.58") | 178.75 mm (≈ 7.04") | 13.75 mm (≈ 0.54") | ≈ 7.7% |
Overall Diameter | 842.20 mm (≈ 33.16") | 814.70 mm (≈ 32.08") | 27.50 mm (≈ 1.08") | ≈ 3.3% |
Circumference | 2646.16 mm (≈ 104.16") | 2559.02 mm (≈ 100.75") | 87.14 mm (≈ 3.43") | ≈ 3.3% |
Radius | 421.10 mm (≈ 16.58") | 407.35 mm (≈ 16.04") | 13.75 mm (≈ 0.54") | ≈ 3.3% |
Rim Diameter | 457.2 mm (18.00") | 457.2 mm (18.00") | - | - |
Rim width range | 7.0’’–9.0’’ | 7.5’’–9.5’’ | - | - |
Can I use 275/65R18 instead of 275/70R18?
Yes, you can safely use a 275/65R18 instead of 275/70R18. While the diameter difference is ≈ 3.27% - which is slightly above the standard 3% guideline for passenger tires - this is a very common swap for trucks. The primary impact is that your speedometer will read roughly 2 mph faster than your actual speed (showing 62 mph when you are doing 60). You will also lose about 0.5 inches of ground clearance, but your truck will likely feel slightly more responsive during acceleration due to the smaller rolling diameter. If you are okay with the truck sitting 1/2 inch lower and the speedometer being slightly off, this is a safe and acceptable swap.
All You Need To Know About 275/70R18 Tires
A 275/70R18 tire means it has a section width of 275 millimeters, an aspect ratio of 70%, and radial construction designed for an 18-inch wheel. In standard inches, this size converts to a tire that is roughly 33.2 inches tall and 10.8 inches wide.
Before buying, drivers should compare the 275/70R18 size against popular alternatives to ensure the right fit. For example, the 275/65R18 is a common stock size that is about 1 inch shorter, while the 285/65R18 offers a wider footprint but slightly less ground clearance. Researching these differences helps ensure you get the perfect balance of height and width for your truck.
Recommended 275/70R18 Tires
Best All season 275 70r18 tires: Kumho Crugen HT51, Hercules Terra Trac Cross-V AW, Nexen Roadian HTX 2
Best 275/70R18 All Terrain tires: Falken Wildpeak A/T4W, Yokohama Geolandar A/T4, Toyo Open Country A/T III
What Are The Dimensions of 275/70R18 Tires in Inches?
275/70R18 tires have a section width of 10.83" (≈ 10.8"), a sidewall height of 7.58" (≈ 7.6"), and a wheel diameter of 18 inches. The overall tire diameter is 33.16" (≈ 33.2"), the circumference is 104.16" (≈ 104.2"), and the recommended rim width range is 7.0 to 9.0 inches.
In inches, the 275/70R18 tire size can be represented as 33.2" × 10.8" R18. In the truck world, this size is considered a "33-inch tire", even though it's technically a fraction taller than a standard 33x12.50.
How tall in inches is a 275 70 18?
A 275/70R18 tire is approximately 33.2 inches tall.
275/70R18 tire size in millimeters and inches is presented in the table below:
275/70R18 Tire Size Dimensions | 275/70R18 Tire Size Dimensions in Inches (") | Formula to Convert 275/70R18 Size in Inches (") |
275 mm (section width) | 10.83" (≈ 10.8") | 275 ÷ 25.4 = 10.83 |
192.50 mm (sidewall height) | 7.58" (≈ 7.6") | (275 × 0.70) ÷ 25.4 = 7.58 |
18 (rim diameter) | 18" | Given |
842.20 mm (overall diameter) | 33.16" (≈ 33.2") | (2 × 192.50 ÷ 25.4) + 18 = 33.16 |
2646.16 mm (circumference) | 104.16" (≈ 104.2") | 33.16 × 3.1416 = 104.16 |
421.10 mm (radius) | 16.58" (≈ 16.6") | 33.16 ÷ 2 = 16.58 |
Comparison of 275/70R18 With Similar Tire Sizes
Compare 275/70R18 with other tire sizes, such as 285/65R18 and 275/65R18, to learn the key differences between them and make the right choice when buying new tires.
What Is The Difference Between 275/70R18 vs 285/65R18?
The main differences between 275/70R18 and 285/65R18 are the footprint width and the total height. The 275/70R18 tire is 0.39" (10 mm) narrower, but its higher aspect ratio provides a 0.28" taller sidewall. This results in an overall diameter of 33.16", making it 0.57" taller than the 285/65R18.
Summary Table comparing 275/70R18 and 285/65R18 tire sizes:
Tire dimensions | 275/70R18 dimensions in mm and inches (") | 285/65R18 dimensions in mm and inches (") | Difference in mm and inches (") | Percentage ≈ difference |
Section Width | 275 mm (≈ 10.83") | 285 mm (≈ 11.22") | 10 mm (≈ 0.39") | ≈ 3.6% |
Sidewall Height | 192.50 mm (≈ 7.58") | 185.25 mm (≈ 7.29") | 7.25 mm (≈ 0.29") | ≈ 3.9% |
Overall Diameter | 842.20 mm (≈ 33.16") | 831.20 mm (≈ 32.94") | 11.00 mm (≈ 0.43") | ≈ 1.3% |
Circumference | 2646.16 mm (≈ 104.16") | 2611.62 mm (≈ 102.82") | 34.54 mm (≈ 1.36") | ≈ 1.3% |
Radius | 421.10 mm (≈ 16.58") | 415.60 mm (≈ 16.36") | 5.50 mm (≈ 0.22") | ≈ 1.3% |
Rim Diameter | 457.2 mm (18.00") | 457.2 mm (18.00") | - | - |
Rim width range | 7.0’’–9.0’’ | 8.0’’–10.0’’ | - | - |
Can I use 285/65R18 instead of 275/70R18?
Yes, using a 285/65R18 instead of a 275/70R18 is acceptable. The overall diameter decreases by approximately 1.7%, which is well within the industry-standard ±3% tolerance for safe replacement. While this swap is safe, keep in mind that the 285/65R18 will provide a slightly wider footprint for stability and a marginally firmer ride due to the shorter sidewall profile.
What Is The Difference Between 275/70R18 vs 275/65R18?
The main difference between 275/70R18 and 275/65R18 is the sidewall height. The 275/70R18 tire has a 0.54" (≈ 13.75 mm) taller sidewall, resulting in a 1.08" (≈ 27.50 mm) larger overall diameter compared to the 275/65R18 size.
Summary Table comparing 275/70R18 and 275/65R18 tire sizes:
Tire dimensions | 275/70R18 dimensions in mm and inches (") | 275/65R18 dimensions in mm and inches (") | Difference in mm and inches (") | Percentage ≈ difference |
Section Width | 275 mm (≈ 10.83") | 275 mm (≈ 10.83") | - | - |
Sidewall Height | 192.50 mm (≈ 7.58") | 178.75 mm (≈ 7.04") | 13.75 mm (≈ 0.54") | ≈ 7.7% |
Overall Diameter | 842.20 mm (≈ 33.16") | 814.70 mm (≈ 32.08") | 27.50 mm (≈ 1.08") | ≈ 3.3% |
Circumference | 2646.16 mm (≈ 104.16") | 2559.02 mm (≈ 100.75") | 87.14 mm (≈ 3.43") | ≈ 3.3% |
Radius | 421.10 mm (≈ 16.58") | 407.35 mm (≈ 16.04") | 13.75 mm (≈ 0.54") | ≈ 3.3% |
Rim Diameter | 457.2 mm (18.00") | 457.2 mm (18.00") | - | - |
Rim width range | 7.0’’–9.0’’ | 7.5’’–9.5’’ | - | - |
Can I use 275/65R18 instead of 275/70R18?
Yes, you can safely use a 275/65R18 instead of 275/70R18. While the diameter difference is ≈ 3.27% - which is slightly above the standard 3% guideline for passenger tires - this is a very common swap for trucks. The primary impact is that your speedometer will read roughly 2 mph faster than your actual speed (showing 62 mph when you are doing 60). You will also lose about 0.5 inches of ground clearance, but your truck will likely feel slightly more responsive during acceleration due to the smaller rolling diameter. If you are okay with the truck sitting 1/2 inch lower and the speedometer being slightly off, this is a safe and acceptable swap.
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