The 285/65R18 equivalent to 32.6x11.2R18 in inches, as follow:
| Inches | Metric | |
| Diameter | 32.6" | 828 mm |
| Tread Width | 11.2" | 285 mm |
| Rim Diameter | 18" | 457 mm |
| Sidewall Height | 7.3" | 185 mm |
| Circumference | 102.4" | 2601 mm |
| Revolutions | 618" | 384 mm |
102. 4"
618 Revs/Mile
The overall diameter of a 285/65R18 is 32.6 inches or 827 mm tall (measurement of a tire’s outside diameter through its exact center when inflated with no load.
The 285/65R18 has a width of 11.2 inches or 285 mm wide. This is the measurement of the tire at its thickest point, the distance between the outer sidewall’s widest point and the inner sidewall’s widest point. This physical width of the tire can change if the tire is mounted on a wheel slightly wider or narrower than the size indicated by the rim width.
The 285/65R18 has a sidewall height of 7.3 inches or 185 mm tall. It’s measured from the wheel rim to the top of the tread, expressed as a percentage of tire width.
The 285/65R18 tire has a size rim of 18 inches or 457 mm. This number represents the distance between the two bead seat areas where the tire is sealed onto the wheel.
The 285/65R18 performs 618 revolutions per mile or 384 revolutions per kilometer. Revolutions per mile indicate the number of times a tire revolves while it covers the distance of one mile/kilometer
The circumference of 285/65R18 is 102.4 inches or 2601 mm.
You can replace the 285/65R18 tires that are within ±3% of the overall tire diameter. In this case, it’s between 31.6 and 33.6 inches (802mm to 852 mm). Check our tire size chart here or the tire size calculator tool here to find your size.
38″ Tire Diameter
There are a lot of things to consider. You need to think about the tire size, the tire type, and what kind of driving you will be doing. Both of these sizes are popular options, so it can be tough to decide which one to choose.
In this blog post, we will compare 285 65r18 and 275 65r18 tire sizes. We will discuss the pros and cons of each size so that you can make an informed decision about which one is right for you!
285 65r18 | 275 65r18 |
Overall Diameter 32. | Overall Diameter 32.07 inches |
Width 11.22 inches | Width 10.83 inche |
Sidewall Height 7.29 inches | Sidewall Height 7.04 inches |
Radial Tire (A Radial-Ply Tire) | Radial Tire (A Radial-Ply Tire) |
Rim Size 18 inches | Rim Size 18 inches |
Circumference 102. | Circumference 100.77 inches |
Revs Per Mile 618 | Revs Per Mile 628 |
The 275 65r18 tire size is a bit smaller than the 285 65r18. The first number, 275, refers to the width of the tire in millimeters. The second number, 65, refers to the sidewall height as a percentage of the width. The last number, 18, is the diameter of the wheel in inches.
The letter “r” stands for radial, which is the type of tire. The 275 65r18 tire size is a popular choice for trucks and SUVs. It offers a good balance of traction, handling, and comfort.
Tire Diameter
The height of the tire will help you to understand the diameter. The diameter of the 285 65r18 tires is 32. 59 inches, while the diameter of the 275 65r18 tires is 32.07 inches. The difference between those two tire sizes is 0.51 inches or 1.6%.
The difference between the two sizes is not very significant, but it can make a difference when you are choosing tires. The diameter of the tire is critical because it affects the circumference of the tire.
Section Width
The section width of the 285 65r18 tires is 11.22 inches, while the section width of the 275 65r18 tires is 10.83 inches. The difference between those two tire sizes is 0.39 inches or 3.5%. The wider tires will also be a bit heavier than the narrower tires. This can affect the gas mileage of your vehicle.
The section width is the tire’s width from one sidewall to the other. The wider the tire, the more contact it will have with the ground. This can provide better traction and handling but also make the ride rougher.
Circumference
The circumference of the 285 65r18 tires is 102. 37 inches, while the circumference of the 275 65r18 tires is 100.77 inches. The difference between those two tire sizes is 1.61 inches or 1.6%. A larger circumference tire will cause the gears to turn slower, which can affect the acceleration of your vehicle.
Revolutions Per Mile
The difference in circumference between the two sizes is not very significant, but it can make a difference in the revolutions per mile. The 285 65r18 tires will travel 384.57 miles per 1000 revolutions, while the 275 65r18 tires will travel 390.71 miles per 1000 revolutions.
The difference between those two tire sizes is 6.14 RPM or 1.6%. This means that the 275 65r18 tires will travel slightly further than the 285 65r18 tires.
Sidewall Height
The sidewall height of the 285 65r18 tires is 7.29 inches, while the sidewall height of the 275 65r18 tires is 7.04 inches. The difference between those two tire sizes is 0.26 inches or 3.5 percent. A taller sidewall can provide a smoother ride, but it can also make the vehicle less stable.
Wheel Size
The wheel size is the diameter of the wheel that the tire is mounted on. The 285 65r18 tires are usually mounted on 18-inch wheels, while the 275 65r18 tires are typically mounted on 18-inch wheels. The difference between those two tire sizes is nothing. So both of these tires can be used on 18-inch wheels.report this ad
Construction Type
The construction type is the way the tire is made. The 285 65r18 tires are radial, while the 275 65r18 tires are also radial. The difference between those two tire sizes is nothing. So both of these tires are radial tires. Radial tires are the most common type of tire. They are made with plies that run across the tire from one sidewall to the other. This gives the tire strength and flexibility.
Our Observation
The main difference between the 285 65r18 and 275 65r18 tires is the width. The 285 65r18 tire size is 0.39 inches or 3.5% wider than the 275 65r18 tire size. The wider tires will also be a bit heavier than the narrower tires. This can affect the gas mileage of your vehicle.
Conclusion
If you are looking for better traction and handling, then the 285 65r18 tires would be the better choice. If you are looking for a tire that will travel further, then the 275 65r18 tires would be the better choice. If you are looking for a tire that will provide a smoother ride, then the 285 65r18 tires would be the better choice.
I hope this article was helpful in understanding the difference between the 285 65r18 and 275 65r18 tire sizes. If you have any questions, please feel free to ask in the comments below. Thanks for reading!
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In the table above you can see a detailed comparison of the difference in dimensions, parameters and performance between a 285/65 R17 tire and a 285/65 R18 tire. The results of the calculations are also presented in the form of visual models (infographics), on which the tire with a size of 285/65 R17 is on top, and with a size of 285/65 R18, respectively, at the bottom. The visualization was generated in two projections: lateral (left) and frontal (right). The online calculator compares tires according to the following characteristics: diameter, width, circumference, profile height, revolutions per km, ground clearance change. In addition, a potential deviation between the actual speed and the speed displayed on the speedometer is calculated, which can occur if the difference between tires 285/65 R17 and 285/65 R18 is significant. US and UK inch version of calculations.
If you want to compare other tyres, just select the required parameters in the drop-down fields and click on the green button.
| Side Comparison | Frontal comparison |
|---|---|
Tire and rim size charts
| Diameter | Size | Rim width | ||
|---|---|---|---|---|
| Min. | Recommended mend. | Max. | ||
| 12 | 125 R12 | 3.5 | 3.0 | 4.0 |
| 135 R12 | 4. | 3.5 | 4.5 | |
| 145 R12 | 4.0 | 3.5 | 5.0 | |
| 155 R12 | 4.5 | 4.0 | 5.0 | |
| 145/70 R12 | 4.5 | 4.0 | 5.0 | |
| 155/70 R12 | 4.5 | 4.0 | 5.5 | |
| 13 | 145/80 R13 | 3.5 | 4 | 5 |
| 145/70 R13 | 3.5 | 4.5 | 5 | |
| 145/60 R13 | 4 | 4.5 | 5 | |
| 155/80 R13 | 4 | 4.5 | 5 | |
| 155/70 R13 | 4 | 4.5 | 5 | |
| 165/80 R13 | 4 | 4.5 | 5 | |
| 165/70 R13 | 4 | 5 | 5.5 | |
| 165/65 R13 | 4.5 | 5 | 6 | |
| 175/70 R13 | 4. | 5 | 6 | |
| 175/65 R13 | 5 | 5 | 6 | |
| 185/70 R13 | 4.5 | 5.5 | 6 | |
| 14 | 145/65 R14 | 4 | 4.5 | 5 |
| 155/65 R14 | 4.5 | 4.5 | 5.5 | |
| 165/70 R14 | 4 | 5 | 5.5 | |
| 165/65 R14 | 4.5 | 5 | 6 | |
| 165/60 R14 | 4.5 | 5 | 6 | |
| 175/80 R14 | 4.5 | 5 | 6 | |
| 175/70 R14 | 4.5 | 5 | 6 | |
| 175/65 R14 | 5 | 5 | 6 | |
| 175/60 R14 | 5 | 5 | 6 | |
| 185/70 R14 | 4.5 | 5.5 | 6 | |
| 185/65 R14 | 5 | 5. | 6.5 | |
| 185/60 R14 | 5 | 5.5 | 6.5 | |
| 185/55 R14 | 5 | 6 | 6.5 | |
| 195/70 R14 | 5 | 6 | 6.5 | |
| 195/65 R14 | 5.5 | 6 | 7 | |
| 195/60 R14 | 5.5 | 6 | 7 | |
| 15 | 145/65 R15 | 4 | 4.5 | 5 |
| 155/70 R15 | 4 | 4.5 | 5 | |
| 155/65 R15 | 4.5 | 4.5 | 5.5 | |
| 165/65 R15 | 4.5 | 5 | 6 | |
| 175/65 R15 | 5 | 5 | 6 | |
| 175/60 R15 | 5 | 5 | 6 | |
| 175/55 R15 | 5 | 5.5 | 6 | |
| 185/65 R15 | 5 | 5. | 6.5 | |
| 185/60 R15 | 5 | 5.5 | 6.5 | |
| 185/55 R15 | 5 | 6 | 6.5 | |
| 195/70 R15 | 5 | 6 | 6.5 | |
| 195/65 R15 | 5.5 | 6 | 7 | |
| 195/60 R15 | 5.5 | 6 | 7 | |
| 195/55 R15 | 5.5 | 6 | 7 | |
| 195/50 R15 | 5.5 | 6 | 7 | |
| 195/45 R15 | 6 | 6.5 | 7.5 | |
| 205/70 R15 | 5 | 6 | 7 | |
| 205/65 R15 | 5.5 | 6 | 7.5 | |
| 205/60 R15 | 5.5 | 6 | 7.5 | |
| 205/55 R15 | 5.5 | 6.5 | 7.5 | |
| 205/50 R15 | 5. | 6.5 | 7.5 | |
| 215/70 R15 | 5.5 | 6.5 | 7 | |
| 215/65 R15 | 6 | 6.5 | 7.5 | |
| 225/60 R15 | 6 | 6.5 | 8 | |
| 225/55 R15 | 6 | 7 | 8 | |
| 225/50 R15 | 6 | 7 | 8 | |
| 16 | 195/60 R16 | 5.5 | 6 | 7 |
| 195/55 R16 | 5.5 | 6 | 7 | |
| 195/50 R16 | 5.5 | 6 | 7 | |
| 195/45 R16 | 6 | 6.5 | 7.5 | |
| 205/60 R16 | 5.5 | 6 | 7.5 | |
| 205/55 R16 | 5.5 | 6.5 | 7.5 | |
| 205/50 R16 | 5.5 | 6.5 | 7. | |
| 205/45 R16 | 6.5 | 7 | 7.5 | |
| 215/65 R16 | 6 | 6.5 | 7.5 | |
| 215/60 R16 | 6 | 6.5 | 7.5 | |
| 215/55 R16 | 6 | 7 | 7.5 | |
| 215/40 R16 | 7 | 7.5 | 8.5 | |
| 225/60 R16 | 6 | 6.5 | 8 | |
| 225/55 R16 | 6 | 7 | 8 | |
| 225/50 R16 | 6 | 7 | 8 | |
| 235/60 R16 | 6.5 | 7 | 8.5 | |
| 245/55 R16 | 7.5 | 8 | 9 | |
| 17 | 205/55 R17 | 5.5 | 6.5 | 7.5 |
| 205/50 R17 | 5.5 | 6.5 | 7.5 | |
| 205/45 R17 | 6. | 7 | 7.5 | |
| 205/40 R17 | 7 | 7.5 | 8 | |
| 215/60 R17 | 6 | 6.5 | 7.5 | |
| 215/55 R17 | 6 | 7 | 7.5 | |
| 215/50 R17 | 6 | 7 | 7.5 | |
| 215/45 R17 | 7 | 7 | 8 | |
| 215/40 R17 | 7 | 7.5 | 8.5 | |
| 225/60 R17 | 6 | 6.5 | 8 | |
| 225/55 R17 | 6 | 7 | 8 | |
| 225/50 R17 | 6 | 7 | 8 | |
| 225/45 R17 | 7 | 7.5 | 8.5 | |
| 225/35 R17 | 7.5 | 8 | 9 | |
| 235/65 R17 | 6.5 | 7 | 8.5 | |
| 235/55 R17 | 6. | 7.5 | 8.5 | |
| 235/50 R17 | 6.5 | 7.5 | 8.5 | |
| 235/45 R17 | 7.5 | 8 | 9 | |
| 235/40 R17 | 8 | 8.5 | 9.5 | |
| 245/55 R17 | 7 | 7.5 | 8.5 | |
| 245/45 R17 | 7.5 | 8 | 9 | |
| 245/40 R17 | 8 | 8.5 | 9.5 | |
| 255/55 R17 | 7 | 8 | 9 | |
| 255/45 R17 | 8 | 8.5 | 9.5 | |
| 255/40 R17 | 8.5 | 9 | 10 | |
| 265/40 R17 | 9 | 9.5 | 10.5 | |
| 275/40 R17 | 9 | 9.5 | 11 | |
| 285/40 R17 | 9.5 | 10 | 11 | |
| 335/35 R17 | 11 | 12 | 13 | |
| 18 | 205/40 R18 | 7 | 7. | 8 |
| 215/45 R18 | 7 | 7 | 8 | |
| 225/60 R18 | 6 | 6.5 | 8 | |
| 225/45 R18 | 7 | 7.5 | 8.5 | |
| 225/40 R18 | 7.5 | 8 | 9 | |
| 225/35 R18 | 7.5 | 8 | 9 | |
| 235/65 R18 | 6.5 | 7 | 8.5 | |
| 235/50 R18 | 6.5 | 7.5 | 8.5 | |
| 235/45 R18 | 7.5 | 8 | 9 | |
| 235/40 R18 | 8 | 8.5 | 9.5 | |
| 245/50 R18 | 7 | 7.5 | 8.5 | |
| 245/45 R18 | 7.5 | 8 | 9 | |
| 245/40 R18 | 8 | 8.5 | 9.5 | |
| 245/35 R18 | 8 | 8. | 9.5 | |
| 255/45 R18 | 8 | 8.5 | 9.5 | |
| 255/40 R18 | 8.5 | 9 | 10 | |
| 255/35 R18 | 8.5 | 9 | 10 | |
| 265/40 R18 | 9 | 9.5 | 10.5 | |
| 265/35 R18 | 9 | 9.5 | 10.5 | |
| 275/45 R18 | 8.5 | 9 | 10.5 | |
| 275/40 R18 | 9 | 9.5 | 11 | |
| 275/35 R18 | 9 | 9.5 | 11 | |
| 285/40 R18 | 9.5 | 10 | 11 | |
| 285/35 R18 | 9.5 | 10 | 11 | |
| 285/30 R18 | 10 | 10 | 10.5 | |
| 295/35 R18 | 10 | 10.5 | 11.5 | |
| 295/30 R18 | 10. | 10.5 | 11 | |
| 315/30 R18 | 11 | 11 | 12.5 | |
| 335/30 R18 | 12 | 12 | 12.5 | |
| 345/35 R18 | 11.5 | 12 | 13.5 | |
| 345/30 R18 | 12 | 12 | 12.5 | |
| 19 | 225/40 R19 | 7.5 | 8 | 9 |
| 225/35 R19 | 7.5 | 8 | 9 | |
| 235/35 R19 | 8 | 8.5 | 9.5 | |
| 245/45 R19 | 7.5 | 8 | 9 | |
| 245/40 R19 | 8 | 8.5 | 9.5 | |
| 245/35 R19 | 8 | 8.5 | 9.5 | |
| 255/40 R19 | 8.5 | 9 | 10 | |
| 255/35 R19 | 8.5 | 9 | 10 | |
| 255/30 R19 | 8. | 9 | 9.5 | |
| 265/35 R19 | 9 | 9.5 | 10.5 | |
| 265/30 R19 | 9 | 9.5 | 10 | |
| 275/50 R19 | 7.5 | 8.5 | 9.5 | |
| 275/40 R19 | 9 | 9.5 | 11 | |
| 275/35 R19 | 9 | 9.5 | 11 | |
| 275/30 R19 | 9 | 9.5 | 10 | |
| 285/35 R19 | 9.5 | 10 | 11 | |
| 295/30 R19 | 10.5 | 10.5 | 11 | |
| 305/30 R19 | 11 | 11 | 12 | |
| 315/25 R19 | 11 | 11.5 | 12 | |
| 325/30 R19 | 11 | 11.5 | 12 | |
| 345/30 R19 | 12 | 12 | 12.5 | |
| 20 | 235/30 R20 | 8. | ||
| 245/40 R20 | 8 | 8.5 | 9.5 | |
| 245/35 R20 | 8 | 8.5 | 9.5 | |
| 245/30 R20 | 8 | 8.5 | 9 | |
| 255/35 R20 | 8.5 | 9 | 10 | |
| 255/30 R20 | 8.5 | 9 | 9.5 | |
| 275/45 R20 | 8.5 | 9 | 10.5 | |
| 275/35 R20 | 9 | 9.5 | 11 | |
| 285/30 R20 | 10 | 10 | 10.5 | |
| 285/25 R20 | 10.5 | |||
| 295/25 R20 | 10.5 | 10.5 | 11 | |
| 305/35 R20 | 10 | 11 | 12 | |
| 305/25 R20 | 10.5 | 11 | 11.5 | |
| 325/25 R20 | 11. | 12 | 12.5 | |
| 335/30 R20 | 12 | 12 | 12.5 | |
| 21 | 245/35 R21 | 8 | 8.5 | 9.5 |
| 255/30 R21 | 9 | 9 | 9.5 | |
| 285/30 R21 | 10 | 10 | 10.5 | |
| 295/25 R21 | 10 | 10.5 | 11 | |
| 22 | 255/30 R22 | 8.5 | 9 | 9.5 |
| 295/25 R22 | 10.5 | 10.5 | 11 | |
| Diameter | Size | Rim width | ||
|---|---|---|---|---|
| Min. | Recommended mend. | Max. | ||
| 15 | 185/65 R15 | 5 | 5.5 | 6.5 |
| 195/80 R15 | 5 | 5.5 | 6.5 | |
| 195/70 R15 | 5 | 6 | 6.5 | |
| 205/70 R15 | 5 | 6 | 7 | |
| 215/80 R15 | 5.5 | 6 | 7 | |
| 225/75 R15 | 6 | 6 | 7.5 | |
| 235/75 R15 | 6 | 6.5 | 8 | |
| 255/75 R15 | 6.5 | 7 | 8.5 | |
| 265/70 R15 | 7 | 8 | 9 | |
| 16 | 205/80 R16 | 5 | 5.5 | 7 |
| 215/70 R16 | 5.5 | 6.5 | 7 | |
| 215/65 R16 | 6 | 6. | 7.5 | |
| 215/60 R16 | 6 | 6.5 | 7.5 | |
| 225/75 R16 | 6 | 6 | 7.5 | |
| 225/70 R16 | 6 | 6.5 | 7.5 | |
| 235/85 R16 | 6 | 6.5 | 7.5 | |
| 235/70 R16 | 6 | 7 | 8 | |
| 235/60 R16 | 6.5 | 7 | 8.5 | |
| 245/70 R16 | 6.5 | 7 | 8 | |
| 255/70 R16 | 6.5 | 7.5 | 8.5 | |
| 255/65 R16 | 7 | 7.5 | 9 | |
| 265/70 R16 | 7 | 8 | 9 | |
| 275/70 R16 | 7 | 8 | 9 | |
| 17 | 225/65 R17 | 6 | 6.5 | 8 |
| 225/55 R17 | 6 | 7 | 8 | |
| 235/65 R17 | 6. | 7 | 8.5 | |
| 235/55 R17 | 6.5 | 7.5 | 8.5 | |
| 245/65 R17 | 7 | 7 | 8.5 | |
| 255/60 R17 | 7 | 7.5 | 9 | |
| 255/50 R17 | 7 | 8 | 9 | |
| 265/65 R17 | 7.5 | 8 | 9.5 | |
| 265/70 R17 | 7 | 8 | 9 | |
| 275/65 R17 | 7.5 | 8 | 9.5 | |
| 275/55 R17 | 7.5 | 8.5 | 9.5 | |
| 18 | 225/55 R18 | 6 | 7 | 8 |
| 235/60 R18 | 6.5 | 7 | 8.5 | |
| 235/50 R18 | 6.5 | 7.5 | 8.5 | |
| 255/60 R18 | 7 | 7.5 | 9 | |
| 255/55 R18 | 7 | 8 | 9 | |
| 255/45 R18 | 8 | 8. | 9.5 | |
| 265/60 R18 | 7.5 | 8 | 9.5 | |
| 285/50 R18 | 8 | 9 | 10 | |
| 19 | 255/55 R19 | 7 | 8 | 9 |
| 255/50 R19 | 7 | 8 | 9 | |
| 275/45 R19 | 8.5 | 9 | 10.5 | |
| 285/45 R19 | 9 | 9.5 | 10.5 | |
| 20 | 255/50 R20 | 7 | 8 | 9 |
| 275/50 R20 | 7.5 | 8.5 | 9.5 | |
| 275/40 R20 | 9 | 9.5 | 11 | |
| 295/40 R20 | 10 | 10.5 | 11.5 | |
| 315/35 R20 | 10.5 | 11 | 12.5 | |
| 21 | 295/35 R21 | 10 | 10. | 11.5 |
| 22 | 285/35 R22 | 9.5 | 10 | 11 |
| 295/30 R22 | 10 | 10.5 | 11 | |
| 23 | 315/25 R23 | 11 | 11.5 | 12 |
| Diameter | Size | Rim width | ||
|---|---|---|---|---|
| Min. | Recommended mend. | Max. | ||
| 13 | 155/80 R13 | 4 | 4.5 | 5 |
| 165/70 R13 | 4.5 | 5 | 5 | |
| 14 | 165/70 R14 | 4.5 | 5 | 5 |
| 165/75 R14 | 4 | 4. | 5 | |
| 175/65 R14 | 5 | 5 | 5.5 | |
| 175/75 R14 | 4.5 | 5 | 5.5 | |
| 185/75 R14 | 4.5 | 5 | 6 | |
| 185/80 R14 | 4.5 | 5 | 6 | |
| 195/75 R14 | 5 | 5.5 | 6 | |
| 195/80 R14 | 5 | 5.5 | 6 | |
| 205/75 R14 | 5 | 5.5 | 6.5 | |
| 15 | 185/80 R15 | 4.5 | 5 | 6 |
| 195/70 R15 | 5.5 | 6 | 6 | |
| 205/65 R15 | 5.5 | 6 | 6.5 | |
| 205/70 R15 | 5.5 | 6 | 6.5 | |
| 215/65 R15 | 6 | 6.5 | 7 | |
| 215/70 R15 | 6 | 6. | 7 | |
| 225/70 R15 | 6 | 6.5 | 7 | |
| 16 | 6.5/100 R16 | 4.5 | 4.5 | 6 |
| 175/75 R16 | 4.5 | 5 | 5.5 | |
| 175/80 R16 | 4.5 | 5 | 5.5 | |
| 185/75 R16 | 4.5 | 5 | 6 | |
| 195/60 R16 | 5.5 | 6 | 6.5 | |
| 195/65 R16 | 5.5 | 6 | 6 | |
| 195/75 R16 | 5 | 5.5 | 6 | |
| 205/65 R16 | 5.5 | 6 | 6.5 | |
| 205/75 R16 | 5 | 5.5 | 6.5 | |
| 215/60 R16 | 6 | 6.5 | 7 | |
| 215/65 R16 | 6 | 6.5 | 7 | |
| 215/75 R16 | 5. | |||
