Tire Size 205/75r14 vs 205/75r15

The primary difference between tire sizes 205/75r14 and 205/75r15 is the rim diameter. The “14” and “15” denote the rim diameter in inches for each tire respectively. Hence, the 205/75r14 tire fits a 14-inch rim, while the 205/75r15 fits a 15-inch rim. This results in a difference in total diameter, with the 205/75r15 being 1 inch larger in diameter, impacting the tire’s revolutions per mile.

205/75r14 vs 205/75r15 Table

The table compares the features of tire sizes 205/75R14 and 205/75R15, along with the percentage difference between them.

Feature	205/75r14	205/75r15	Difference
Overall Diameter	26.11″	27.11″	1 (25.4)
Width inches	8.07″	8.07″	0 (0) 0%
Circumference	82.02″	85.16″	3.14
Sidewall Height	6.05″	6.05″	0 (0) 0%
Revolutions	772.54	744.04	28.5
Rim Size	14″	15″	Different
Rim Width Range	5.0-7.0″	5.0-7.0″	Same

Overall Diameter
The 205/75r15 tire has an overall diameter of 27.11 inches (688.5mm), which is 1 inch (25.4mm) or 3.8% larger than the 205/75r14 tire’s diameter of 26.11 inches (663.1mm). A larger diameter provides more ground clearance, beneficial for off-road driving or navigating rough terrains.

It also results in lower speedometer readings due to the tire covering more ground with each revolution. Conversely, a smaller diameter reduces ground clearance and can result in higher speedometer readings.

Section Width
The section width for both tires is 8.07 inches (205mm), with no differences. A wider tire improves traction as the increased contact patch enhances grip, particularly during acceleration, braking, and cornering.

However, there’s also more road noise due to the increased contact area. Conversely, a narrower width reduces the contact area, potentially reducing grip, especially in wet or slippery conditions.

Circumference
The 205/75r15 tire has a circumference of 85.16 inches (2162.99mm), which is 3.14 inches (79.8mm) or 3.8% larger than the 205/75r14 tire’s circumference of 82.02 inches (2083.19mm). An increased circumference results in lower speedometer readings, while a decreased circumference leads to higher readings.

Sidewall Height
The sidewall height for both tires is 6.05 inches (153.75mm). Taller sidewalls absorb more road irregularities, providing a smoother ride and increased traction on snowy or icy roads.

Conversely, shorter sidewalls may result in a harsher ride due to less cushioning, but they provide a sportier and more aggressive look.

Revolutions Per Mile

The 205/75r14 tire makes 772.54 revolutions per mile (480.03 revolutions per kilometer), which is 28.5 revolutions per mile (17.71 revolutions per kilometer) or 3.7% more than the 205/75r15 tire’s 744.04 revolutions per mile (462.32 revolutions per kilometer).

Higher revolutions per mile equate to more wear, potentially shortening the tire’s lifespan. Conversely, lower revolutions per mile cover less distance per rotation, potentially extending the tire’s lifespan due to reduced wear and tear.

Rim Size
The 205/75r14 tire fits a 14-inch rim, while the 205/75r15 fits a 15-inch rim. Larger rims offer a more aggressive and sporty look, while smaller rims impart a more classic or conservative appearance. Both tires, however, can accommodate rim widths ranging from 5.0-7.0 inches.

How much taller is a 205/75r15 tire than a 205/75r14?

The height of a 205/75r15 tire is 27.11 inches (688.5 mm), and the height of a 205/75r14 tire is 26.11 inches (663.1 mm). Hence, the 205/75r15 tire is approximately 1 inch (or 25.4 mm) taller than the 205/75r14 tire.

How much wider is a 205/75r15 tire than a 205/75r14?

The width of a 205/75r15 tire is 8.07 inches (205 mm), identical to the width of a 205/75r14 tire, which is also 8.07 inches (205 mm). Therefore, there is no difference in width between a 205/75r15 tire and a 205/75r14 tire.

Can I use 205/75r15 instead of 205/75r14?

The overall diameter of a 205/75r15 tire is 27.11 inches (688.5 mm), while the 205/75r14 tire has an overall diameter of 26.11 inches (663.1 mm). The difference between these two tire sizes is around 1 inch (25.4 mm), which is about a 3.8% increase.

Given this, using a 205/75r15 tire in place of a 205/75r14 might not be advisable due to the 3.8% difference, which exceeds the recommended 3% limit. It would be best to consult a tire or vehicle professional to ensure safety and performance.

Can I put a 205/75r15 on a 205/75r14?

The 205/75r15 and 205/75r14 tires can both fit on a rim with a width range of 5.0-7.0 inches. Therefore, it is possible to mount a 205/75r15 tire on a rim that previously held a 205/75r14 tire, as they share the same rim width range. But it is not recommended.

Our Observations
Though they share many characteristics, the main distinction between the 205/75r14 and 205/75r15 tires lies in their diameter, circumference, revolutions per mile, and rim size. Selecting the right tire size depends largely on your driving conditions and preferences.

If you prioritize ground clearance, a smoother ride, or longer tire life, the 205/75r15 tire could be a better choice. Conversely, if you desire higher speedometer readings or a more classic look, the 205/75r14 tire may be more suitable.

Always remember to adhere to the general rule of keeping the tire diameter within a 3% difference from the factory-recommended tires to ensure optimal performance and safety. Happy driving!