Tire Size 225/65r17 vs 225/55r17

The main difference is the aspect ratio, which is the percentage of the tire width that is the sidewall height. The 225/65R17 has an aspect ratio of 65, while the 225/55R17 has an aspect ratio of 55. This means that the 225/65R17 has a taller sidewall than the 225/55R17.

225/65r17 vs 225/55r17 Table

The table compares the features of tire sizes 225/55R17 and 225/65R17, along with the percentage difference between them.

Overall Diameter26.74″28.52″1.77″
Width inches8.86″8.86″0 (0)
Sidewall Height4.87″5.76″0.89″
Rim Size17″17″Same
Rim Width Range6.0-8.0″6.0-8.0″Same

Overall Diameter
The overall diameter of a tire refers to the total height of the tire. The 225/65r17 tire has a diameter of 28.52 inches (724.3mm), while the 225/55r17 tire has a diameter of 26.74 inches (679.3mm). This difference of 1.77 inches (45mm) or 6.6% means that the 225/65r17 tire is taller.

A larger tire height provides more ground clearance, beneficial for off-road driving or navigating rough terrain. However, it can result in a lower speedometer reading. Conversely, a smaller tire height reduces ground clearance, potentially causing damage when driving over obstacles or rough roads, but it results in a higher speedometer reading.

Section Width
The section width of both tires is the same at 8.86 inches (225mm). A wider tread width generally improves traction due to a larger contact patch, enhancing the tire’s grip during acceleration, braking, and cornering. However, wider tires often produce more road noise due to the larger contact area.

The 225/65r17 tire has a larger circumference of 89.58 inches (2275.46mm) than the 225/55r17 tire’s 84.02 inches (2134.08mm). This difference of 5.57 inches (141.37mm) or 6.6% means that the larger tire will cover more ground per revolution.

An increased circumference results in lower speedometer readings, while a decreased circumference results in higher readings.

Sidewall Height
The sidewall height of the 225/65r17 tire is 5.76 inches (146.25mm), which is 0.89 inches (22.5mm) or 18.2% taller than the 225/55r17 tire’s 4.87 inches (123.75mm). A taller sidewall acts as a buffer, absorbing more bumps and road irregularities for a smoother ride.

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

Revolutions per Mile
The 225/65r17 tire has fewer revolutions per mile (707.26) compared to the 225/55r17 tire (754.11). This difference of -46.85 revolutions per mile (-6.2%) means the larger tire covers more distance per revolution, potentially reducing wear and tear and extending its lifespan.

Conversely, more revolutions per mile mean more wear, as the tire experiences increased friction with the road surface, leading to a shorter lifespan.

Rim Size
Both tires fit on a 17″ rim with a width range of 6.0-8.0″. Larger rims are often associated with a more aggressive and sporty look, while smaller rims can provide a more classic or conservative appearance.

Construction Type
Both tires have a radial construction, indicated by the ‘r’ in their size. Radial tires are known for their durability, comfort, and fuel efficiency.

How much taller is a 225/65r17 tire than a 225/55r17?

The height of a 225/65r17 tire is 28.52 inches (724.3 mm), while the height of a 225/55r17 tire is 26.74 inches (679.3 mm). Therefore, the 225/65r17 tire is approximately 1.77 inches (or 45 mm) taller than the 225/55r17 tire, which is a difference of around 6.6%.

How much wider is a 225/65r17 tire than a 225/55r17?

The width of both a 225/65r17 tire and a 225/55r17 tire is the same at 8.86 inches (225 mm). Therefore, there is no difference in width between the two tires, indicating a 0% discrepancy in this aspect.

Can I use 225/65r17 instead of 225/55r17?

The overall diameter of a 225/65r17 tire is 28.52 inches, whereas the 225/55r17 tire has an overall diameter of 26.74 inches. These two tire sizes are roughly 1.77 inches or about 6.6%.

Given that this exceeds the suggested 3% difference, using a 225/65r17 tire instead of a 225/55r17 may not be appropriate without professional advice. Always consult a tire or vehicle specialist before making such changes to ensure safety and proper vehicle performance.

Can I put a 225/65r17 on a 225/55r17?

The suggested rim width range for both 225/65r17 and 225/55r17 tires is 6.0-8.0 inches. This means a 225/65r17 tire can be fitted onto the same rim as a 225/55r17.

Our Observation
Choosing between the 225/65r17 and 225/55r17 tire sizes depends on your driving conditions and preferences. If you frequently drive off-road or on rough terrain, the 225/65r17 tire’s larger diameter, taller sidewall, and lower revolutions per mile may be beneficial.

However, if you prefer a sportier look and feel, the 225/55r17 tire’s smaller diameter and shorter sidewall might be more suitable. Always remember to keep the diameter within 3% of the factory-recommended tires for optimal performance and safety.

In conclusion, understanding the differences between tire sizes can help you make an informed decision that enhances your vehicle’s performance and driving experience. Always consult with a tire professional when considering a change in tire size.

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