Tire Size 27×8.5r14 In Metric

27x8.5r14 In Metric

Have you ever gazed at the cryptic numbers on your tire sidewall and wondered what they actually mean? Let’s focus on one specific example: 27×8.5R14. What do these numbers and letters represent, and how do they translate into the worldwide metric system?

Dimension Breakdown
The tire size 27×8.5R14 might seem like a random assortment of numbers and letters, but each character signifies an important aspect of the tire’s dimension.

  • The first number, ‘27,’ stands for the tire’s overall diameter in inches. The diameter is the total height of the tire from the bottom to the top.
  • Next is ‘X,’ which separates the diameter from the width.
  • 8.5‘ is the tire’s width, again in inches. This is the straight-line distance from one side of the tire to the other, excluding any curvatures.
  • R‘ signifies that the tire is Radial, meaning the internal ply cords are oriented radially or perpendicular to the tire’s travel direction.
  • Finally, ’14’ represents the wheel diameter, which is the size of the wheel from one end to the other, measured in inches.

27×8.5r14 In inches

Tire Diameter27.0″
Tire Section Width8.5″
Rim Width Range14″ x 6-7.5″
Sidewall Height6.5″

Conversion Process
Let’s dive into converting these measurements from inches to millimeters, the metric equivalent. The overall diameter of ’27’ inches converts to roughly 685.8 mm, as 1 inch equals 25.4 mm.

Similarly, the tire width of ‘8.5’ inches translates to about 215.9 mm in the metric system. The wheel diameter ’14’ inches becomes approximately 355.6 mm when converted to millimeters.

As for the Sidewall Height, it’s calculated using the aspect ratio, which in our case, is not explicitly given. Traditionally, a tire like ours might have an aspect ratio of about 75%, meaning the sidewall height is 75% of the tire width. Hence, the sidewall height in millimeters would be approximately 161.925 mm.

Remember, these conversions aren’t exact due to the different standards used by tire manufacturers but they give a good approximation.


Finding a Close Metric Equivalent
The metric system often represents the tire size as Width/Aspect Ratio/Rim Diameter. For instance, a tire size of 215/75R15 indicates a tire width of 215 mm, an aspect ratio of 75%, and a rim diameter of 15 inches.

For the 27X8.5R14 tire size, we’ve already calculated the metric measurements: an overall diameter of 685.8 mm, a width of approximately 215.9 mm, and a wheel diameter of about 355.6 mm.

As we know the aspect ratio of 75%, we get a metric equivalent of 215/75R14. However, it’s essential to note that while this metric size is a close match, it may differ due to manufacturing standards and design variances.

Replacement Tire Size

Tire SizeOverall DiameterDifference
215/70R1425.9″ (658 mm)-2.9%
255/60R1426.1″ (662 mm)-2.4%
205/75R1426.1″ (664 mm)-2.1%
195/80R1426.3″ (668 mm)-1.5%
225/70R1426.5″ (672 mm)-0.9%
265/60R1426.5″ (674 mm)-0.6%
275/60R1427″ (686 mm)1.2%
235/70R1427″ (686 mm)1.2%
225/75R1427.3″ (694 mm)2.4%

Practical Applications
The 27×8.5R14 tire size is commonly used in light trucks, SUVs, and off-road vehicles. Its large diameter and width offer stability and traction, particularly beneficial for off-road terrains. 

For instance, in a recreational off-road event like a ‘jeep jamboree,’ you’ll see plenty of these tires tackling rough, uneven landscapes. Or, consider an everyday SUV designed for both city and rural roads – the 27×8.5R14 tire provides the versatility needed for changing driving conditions.

What Is Equivalent To A 27×8.5R14?

To find an equivalent tire, you’re looking for a tire with the same or very close dimensions of 27×8.5R14 tire size. In the metric system, this tire size could be equivalent to something like 215/75/R14.

How Tall Are 27×8.5r14?

The overall height of a tire can be calculated by using the information provided in the tire’s size. From this information, we can see that the overall height of the tire is 27 inches. This is the measurement from one side of the tire to the other, passing through the center.

How Wide Is A 27×8.5r14 Tire?

The width of a tire is indicated by the second number in its size specification. In the case of the 27×8.5R14 tire size you mentioned, the width is 8.5 inches. This measurement is taken from the widest point of the tire’s outer sidewall to the widest point of its inner sidewall. Please note that this measurement assumes the tire is mounted on the correct width wheel for that tire size.

What Size Rim Fits A 33×12.50r20?

The size of the rim that fits a tire is indicated by the last number in the tire’s size. In the size you provided, 27×8.5R14, the “14” represents the rim diameter in inches. Therefore, a 27×8.5R14 tire would fit on a 14-inch rim.

However, it’s also important to ensure that the rim’s width is suitable for the tire’s width. The rim width of approximately 6-7.5 inches is typically suitable, but this can vary depending on the specific tire model and the manufacturer’s recommendations.

Understanding tire sizes like the 27×8.5R14 and their metric equivalents is more than a fascinating exploration into the world of tires. It equips you with the knowledge to make informed decisions about your vehicle’s tires, whether you’re off-roading, driving through city streets, or gearing up for a long-distance road trip.

Knowing how to convert tire measurements from inches to millimeters is a practical skill in this metric-centric world, offering you a broader perspective when shopping for tires internationally or comparing tire sizes. 

And remember, the right tire size is key to ensuring your vehicle’s performance, safety, and efficiency. So, the next time you glance at those cryptic numbers on your tire, you’ll know exactly what they mean and how they translate into the language of metrics!

Leave a Comment

Your email address will not be published. Required fields are marked *

Scroll to Top