Tire Size 225/70r15 vs 235/75r15

The 235/75R15 tire has a wider sidewall than the 225/70R15 tire. This means that the 235/75R15 tire will have more contact with the road, which can improve handling and traction. However, the 235/75R15 tire will also be slightly larger in diameter, which can cause the speedometer to read somewhat high.

225/70r15 vs 235/75r15 Table

Here is a table comparing the key differences between the 225/70r15 and 235/75r15 tire sizes.

Feature 225/70r15 235/75r15 Difference
Diameter 27.4″ 28.88″ 1.48 (5.4%)
Width 8.86″ 9.25″ 0.39 (4.4%)
Circum. 86.08″ 90.72″ 4.64 (5.4%)
Sidewall Height 6.2″ 6.94″ 0.74 (11.9%)
Revolutions 736.02 698.39 37.63 (5.1%)

Alternative Tire Size of 235/75r15
Several alternative tire sizes are available to consider for the 235/65r16 tire size. The following table displays the overall diameter and the difference in diameter for some of the most popular alternative tire sizes.

Tire Size Overall Diameter Difference
255/65R15 28.1″ (713 mm) -2.7%
225/75R15 28.3″ (719 mm) -1.9%
245/70R15 28.5″ (725 mm) -1.1%
215/80R15 28.5″ (725 mm) -1.1%
295/60R15 28.9″ (735 mm) 0.3%
255/70R15 29.1″ (739 mm) 0.8%
225/80R15 29.2″ (741 mm) 1.1%
215/85R15 29.4″ (747 mm) 1.9%
245/75R15 29.5″ (749 mm) 2.2%
205/90R15 29.6″ (751 mm) 2.5%
265/70R15 29.6″ (753 mm) 2.7%

Alternative Tire Size of 225/70r15
Here is a table that shows the overall diameter and the difference in diameter for the most popular alternative tire sizes for the 225/70r15 tire size.

Tire Size Overall Diameter Difference
185/80R15 26.7″ (677 mm) -2.9%
295/50R15 26.7″ (677 mm) -2.9%
215/70R15 26.9″ (683 mm) -2.0%
275/55R15 26.9″ (683 mm) -2.0%
235/65R15 27.0″ (687 mm) -1.4%
305/50R15 27.0″ (687 mm) -1.4%
255/60R15 27.0″ (687 mm) -1.4%
205/75R15 27.1″ (689 mm) -1.1%
195/80R15 27.3″ (693 mm) -0.6%
245/65R15 27.5″ (699 mm) 0.3%
265/60R15 27.5″ (699 mm) 0.3%
295/55R15 27.8″ (705 mm) 1.1%
325/50R15 27.8″ (707 mm) 1.4%
275/60R15 28.0″ (711 mm) 2.0%
235/70R15 28.0″ (711 mm) 2.0%
255/65R15 28.1″ (713 mm) 2.3%

Overall Diameter
The 235/75r15 tire has a larger diameter (28.88 inches or 733.5mm) compared to the 225/70r15 tire (27.4 inches or 696mm). This difference of 1.48 inches (37.5mm) or 5.4% implies that the 235/75r15 tire offers more ground clearance, which is beneficial for off-road driving or navigating rough terrain.

However, the larger diameter results in a lower speedometer reading. Conversely, the smaller diameter of the 225/70r15 tire reduces ground clearance, potentially increasing the risk of scraping or damaging the vehicle on rough roads. The smaller diameter also results in a higher speedometer reading.

Section Width
The 235/75r15 tire has a wider section width (9.25 inches or 235mm) than the 225/70r15 tire (8.86 inches or 225mm), a difference of 0.39 inches (10mm) or 4.4%. A wider tread width generally improves traction due to a larger contact patch, enhancing grip during acceleration, braking, and cornering.

However, wider tires may produce more road noise. On the other hand, the narrower 225/70r15 tire has less surface area in contact with the road, which may reduce grip, especially in wet or slippery conditions.

The 235/75r15 tire has a larger circumference (90.72 inches or 2304.36mm) than the 225/70r15 tire (86.08 inches or 2186.55mm), a difference of 4.64 inches (117.81mm) or 5.4%. An increased circumference results in lower speedometer readings, while a decreased circumference leads to higher speedometer readings.

Revolutions Per Mile
The 225/70r15 tire has more revolutions per mile (736.02) compared to the 235/75r15 tire (698.39), a difference of -37.63 or -5.1%. Higher revolutions per mile mean more wear due to increased friction with the road surface, leading to a shorter lifespan. Conversely, fewer revolutions per mile mean the tire covers less distance per rotation, potentially extending its lifespan.

Sidewall Height
The 235/75r15 tire has a taller sidewall (6.94 inches or 176.25mm) than the 225/70r15 tire (6.2 inches or 157.5mm), a difference of 0.74 inches (18.75mm) or 11.9%. A taller sidewall absorbs more bumps and road irregularities, providing a smoother ride.

It also enhances traction on snowy or icy roads. Conversely, a shorter sidewall may result in a harsher ride due to less cushioning but gives a sportier and more aggressive look.

Rim Size
Both tires fit on a 15″ rim, but the 235/75r15 tire can accommodate a wider rim range (6.0-8.0″) compared to the 225/70r15 tire (6.0-7.5″). Larger rims often give a more aggressive and sporty look, while smaller rims provide a more classic or conservative appearance.

How much taller is a 235/75r15 tire than a 225/70r15?

The height of a 235/75r15 tire measures 28.88 inches (733.5 mm), while the height of a 225/70r15 tire comes in at 27.4 inches (696 mm). The 235/75r15 tire is taller by around 1.48 inches or 37.5 mm.

How much wider is a 235/75r15 tire than a 225/70r15?

The width of a 235/75r15 tire is about 9.25 inches (235 mm). On the other hand, a 225/70r15 tire has a width of 8.86 inches (225 mm). Therefore, the 235/75r15 tire is wider by about 0.39 inches or 10 mm compared to the 225/70r15 tire.

Can I use 235/75r15 instead of 225/70r15?

In this case, the overall diameter of the 235/75r15 tire is 28.88 inches (733.5 mm), while the 225/70r15 tire has an overall diameter of 27.4 inches (696 mm).

The difference is approximately 1.48 inches or 37.5 mm, translating to about 5.4%. As this exceeds the advised 3% difference, it would generally not be recommended to use a 235/75r15 tire instead of a 225/70r15.

Can I put a 235/75r15 on a 225/70r15?

The recommended rim width range for a 235/75r15 tire is between 6.0 and 8.0 inches, whereas for a 225/70r15 tire, the recommended range is between 6.0 and 7.5 inches. Given that the ranges overlap, it could be possible to mount a 235/75r15 on a rim typically used for a 225/70r15.

In conclusion, the choice between the 225/70r15 and 235/75r15 tire sizes depends on the driver’s needs and preferences. The 235/75r15 tire offers more ground clearance, improved traction, and a smoother ride due to its larger diameter, wider section width, and taller sidewall. However, it may lead to more road noise and a shorter lifespan due to higher revolutions per mile.

Conversely, the 225/70r15 tire may provide a sportier look and potentially longer lifespan due to fewer revolutions per mile, but it may offer less traction and a harsher ride. As a general rule, it is recommended to choose tires with a diameter within 3% of the factory-recommended tires to maintain optimal vehicle performance.

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