Tire Size 185/55r13 in inches

The tire size 185/55R13, which is equivalent to 21×7.3R13, has a diameter of 21 inches (533.7mm), a section width of 7.3 inches (185mm), a wheel diameter of 13 inches (330mm), and is approved to be mounted on 5.0-7.0 inches (127-177.8mm) wide wheels. Understanding these dimensions is pivotal to ensuring appropriate vehicle performance and safe driving conditions.

185/55r13 in inches

Feature Metric Inches
Tire Height 534 mm 21″
Tread Width 185 mm 7.3″
Rim Diameter 330.2 mm 13″
Sidewall Height 102 mm 4″
Circumference 1676.8 mm 65.9″
Revolutions 596 per km 961 per mile

How Tall Is A 185/55R13 Tire?

The Tire Height of the 185/55R13 tire size is 21 inches (533.7mm). Tire height affects vehicle ground clearance and influences the ride quality. A higher tire can absorb road shocks better, resulting in a smoother ride.

However, it might also increase the vehicle’s center of gravity, affecting stability during sharp turns. Therefore, choosing the right tire height is essential to balance ride comfort and vehicle dynamics.

What Is the 185/55R13 Width In Inches?

The 185/55R13 tire’s tread width is 7.3 inches (185mm). Tread width impacts the vehicle’s traction and handling. A wider tire generally means more contact area with the road, improving grip and stability, especially under braking and cornering.

However, excessively wide tires may increase rolling resistance and negatively impact fuel efficiency. Therefore, the correct width is crucial for achieving optimal performance and economy.

What Is the 185/55R13 Sidewall Height?

The sidewall height of the 185/55R13 tire size is approximately 4 inches (101.8mm). Sidewall height plays a significant role in the vehicle’s ride comfort and handling.

A taller sidewall generally provides better shock absorption, making for a more comfortable ride over bumps and potholes. Conversely, a lower sidewall height enhances steering response and cornering stability but may compromise ride comfort.

What Is the 185/55R13 Tire Circumference?

The circumference of the 185/55R13 tire size is about 66 inches (1676.7mm). The tire’s circumference directly influences the accuracy of the vehicle’s speedometer, odometer, and transmission shift points.

A larger circumference will cause these devices to under-read, while a smaller one will cause over-reading. So, selecting tires with a circumference that matches the original tires as closely as possible is crucial.

What Is the 185/55R13 Revolutions Per Mile?

For the 185/55R13 tire size, there are approximately 961 revolutions per mile (596 per kilometer). The number of revolutions per mile influences fuel efficiency, tire wear, and vehicle performance.

Fewer revolutions per mile mean the tire rolls fewer times to cover the same distance, potentially improving fuel efficiency but possibly leading to quicker tread wear.

What Is the 185/55R13 Rims Size?

For the 185/55R13 tire size, the rim diameter is 13 inches (330mm). The rim size plays a vital role in tire mounting, vehicle aesthetics, and handling dynamics. A larger rim can improve steering response and cornering stability but may make the ride less comfortable.

Fitment Guide
The 185/55R13 tire size can be fitted on the following vehicles:

  • ROVER: 100 (1994 – 1998), Metro (1990 – 1994)

Replacement Tire Size
Replacement tires have to be within 3% of the total diameter of the original tires to maintain the accuracy of speedometer readings and vehicle dynamics. Always cross-check with your vehicle’s manufacturer guidelines before choosing a replacement tire.

Tire Size Overall Diameter Difference
145/65R13 20.4″ (518 mm) -3%
135/70R13 20.5″ (520 mm) -2.6%
175/55R13 20.6″ (522 mm) -2.2%
165/60R13 20.8″ (528 mm) -1.1%
125/80R13 20.9″ (530 mm) -0.7%
155/65R13 20.9″ (532 mm) -0.4%
225/45R13 20.9″ (532 mm) -0.4%
145/70R13 21″ (534 mm) 0%
255/40R13 21″ (534 mm) 0%
205/50R13 21.1″ (536 mm) 0.4%
175/60R13 21.3″ (540 mm) 1.1%
165/65R13 21.4″ (544 mm) 1.9%
195/55R13 21.4″ (544 mm) 1.9%
215/50R13 21.5″ (546 mm) 2.2%
135/80R13 21.5″ (546 mm) 2.2%
155/70R13 21.6″ (548 mm) 2.6%

Our Observation
The 185/55R13 tire size provides a balanced performance with its adequate section width and moderate sidewall height. It is well suited for small to medium-sized vehicles requiring a comfortable ride with good fuel efficiency.

However, one should always refer to their vehicle’s manufacturer guidelines or consult a tire specialist before choosing this or any tire size, as tire dimensions can significantly influence vehicle handling characteristics, safety, and fuel economy.

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