Tire Size 275/40r20 vs 245/45r20
As a car owner, it is important to understand the various numbers and letters written on the sidewall of your tires. One of the most important pieces of information is the tire size, which can significantly impact the performance of your vehicle. we will compare two popular tire sizes 275/40R20 and 245/45R20, which provide the necessary information to help readers make an informed decision.
275/40r20 vs 245/45r20 Table
By referring to this table, you can gain a better understanding of the variances between tire size 275/65R18 and tire size 265/70R18.
| Feature | 245/45r20 | 275/40r20 | Difference |
|---|---|---|---|
| Diameter | 28.68 in | 28.66 in | 0.02 in (0.1%) |
| Width | 9.65 in | 10.83 in | 1.18 in (12.2%) |
| Circumference | 90.1 in | 90.04 in | 0.06 in (-0.1%) |
| Sidewall Height | 4.34 in | 4.33 in | 0.01 in (0.2%) |
| Revolutions per mile | 703.18 | 703.67 | 0.48 (0.1%) |
Alternative Tire size of 245/45r20
The acceptable range for replacement tire diameter is within 3% of the overall diameter of the original tires.
| Tire Size | Overall Diameter | Difference |
|---|---|---|
| 285/35R20 | 27.9″ (708 mm) | -2.7% |
| 335/30R20 | 28″ (710 mm) | -2.5% |
| 225/45R20 | 28″ (710 mm) | -2.5% |
| 155/65R20 | 28″ (710 mm) | -2.5% |
| 255/40R20 | 28″ (712 mm) | -2.2% |
| 295/35R20 | 28.1″ (714 mm) | -1.9% |
| 345/30R20 | 28.2″ (716 mm) | -1.6% |
| 265/40R20 | 28.3″ (720 mm) | -1.1% |
| 235/45R20 | 28.3″ (720 mm) | -1.1% |
| 305/35R20 | 28.4″ (722 mm) | -0.8% |
| 315/35R20 | 28.7″ (728 mm) | 0% |
| 275/40R20 | 28.7″ (728 mm) | 0% |
| 285/40R20 | 29″ (736 mm) | 1.1% |
| 325/35R20 | 29″ (736 mm) | 1.1% |
| 255/45R20 | 29.1″ (738 mm) | 1.4% |
| 145/80R20 | 29.1″ (740 mm) | 1.6% |
| 235/50R20 | 29.3″ (744 mm) | 2.2% |
| 295/40R20 | 29.3″ (744 mm) | 2.2% |
| 265/45R20 | 29.4″ (746 mm) | 2.5% |
Alternative Tire size of 275/40r20
To be considered a suitable replacement, tires must have an overall diameter that is within 3% of the original tires.
| Tire Size | Overall Diameter | Difference |
|---|---|---|
| 285/35R20 | 27.9″ (708 mm) | -2.7% |
| 335/30R20 | 28″ (710 mm) | -2.5% |
| 225/45R20 | 28″ (710 mm) | -2.5% |
| 155/65R20 | 28″ (710 mm) | -2.5% |
| 255/40R20 | 28″ (712 mm) | -2.2% |
| 295/35R20 | 28.1″ (714 mm) | -1.9% |
| 345/30R20 | 28.2″ (716 mm) | -1.6% |
| 265/40R20 | 28.3″ (720 mm) | -1.1% |
| 235/45R20 | 28.3″ (720 mm) | -1.1% |
| 305/35R20 | 28.4″ (722 mm) | -0.8% |
| 245/45R20 | 28.7″ (728 mm) | 0% |
| 315/35R20 | 28.7″ (728 mm) | 0% |
| 285/40R20 | 29″ (736 mm) | 1.1% |
| 325/35R20 | 29″ (736 mm) | 1.1% |
| 255/45R20 | 29.1″ (738 mm) | 1.4% |
| 145/80R20 | 29.1″ (740 mm) | 1.6% |
| 235/50R20 | 29.3″ (744 mm) | 2.2% |
| 295/40R20 | 29.3″ (744 mm) | 2.2% |
| 265/45R20 | 29.4″ (746 mm) | 2.5% |
Why Compare?
When choosing tires, there are several factors that you should consider, including overall diameter, tread width, rim diameter, sidewall height, circumference, revolutions, and alternative sizes. By comparing two different tire sizes, you can better understand how each size can impact your vehicle’s performance and choose the best suited for your needs.
Overall Diameter
The overall diameter of a tire is the distance between the ground and the top of the tire, including the tread. The 275/40R20 tire has an overall diameter of 28.66 inches, while the 245/45R20 tire has an overall diameter of 28.68 inches. This means that the 245/45R20 tire is slightly taller than the 275/40R20 tire.
Tread Width
The tread width is the distance between the outer edges of the tire’s tread. The 275/40R20 tire has a tread width of 10.83 inches, while the 245/45R20 tire has a tread width of 9.65 inches. This means that the 275/40R20 tire has a wider tread than the 245/45R20 tire, which can provide better stability and handling.
Rim Diameter
The rim diameter is the size of the wheel that the tire is designed to fit. Both the 275/40R20 and the 245/45R20 tires are designed to fit 20-inch rims.
Sidewall Height
The sidewall height is the distance between the rim and the outer edge of the tire’s tread. The 275/40R20 tire has a sidewall height of 4.33 inches, while the 245/45R20 tire has a sidewall height of 4.34 inches. This means that the 245/45R20 tire has a slightly taller sidewall than the 275/40R20 tire.
Circumference
The circumference of a tire is the distance around the outer edge of the tire’s tread. The 275/40R20 tire has a circumference of 90.04 inches, while the 245/45R20 tire has a circumference of 90.1 inches. This means that the 245/45R20 tire has a slightly larger circumference than the 275/40R20 tire.
Revolutions
The number of revolutions per mile is the number of times a tire rotates to travel a distance of one mile. The 275/40R20 tire has 703.67 revolutions per mile, while the 245/45R20 tire has 703.18 revolutions per mile. This means that the 245/45R20 tire will rotate slightly more times per mile than the 275/40R20 tire.
Our Observation
Both the 275/40R20 and 245/45R20 tire sizes have their own advantages and disadvantages. The 245/45R20 tire is slightly taller and has a larger circumference, which can provide better ground clearance and a smoother ride. However, the 275/40R20 tire has a wider tread, which can provide better stability and handling.
Additionally, the 275/40R20 tire has a lower sidewall height, which can provide a sportier look to your vehicle. It is important to note that choosing the correct tire size is crucial for the safety and performance of your vehicle. You should consult with a tire specialist or refer to your vehicle’s owner’s manual to determine the appropriate tire size for your vehicle.
Meet Caitlin McCormack, a Tire Size Expert and Blogger Passionate About Everything Related to Tires. With Years of Experience in the Tire Industry, Caitlin Has Become an Expert in Tire Sizes and Their Impact on Vehicle Performance.