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| Attribute | American | European |
|---|---|---|
| Rim Size | 15 in | 381 mm |
| Width | 7.3 in | 185 mm |
| Sidewall | 4.7 in | 120.3 mm |
| Diameter | 24.5 in | 622.3 mm |
| Circumference | 76.9 in | 1953.3 mm |
| Revolutions per Mile | 824 | 512 per km |
The tire size 185/65R15 has the following key attributes: diameter, width, wheel (rim), sidewall, circumference, and revs per mile (rpm). Each of these attributes plays a critical role in determining the tire’s performance, appearance, and compatibility with the vehicle.
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The diameter for the 185/65R15 tire is 24.5 in (622.3 mm). The diameter represents the distance from one end of the tire to the other, passing through the center. It is essential to choose a tire with the correct diameter, as it can impact the overall performance, ride comfort, and vehicle clearance.
With a width of 7.3 in (185 mm), the 185/65R15 tire’s width measures the distance between the inner and outer sidewalls at the widest point. The width of a tire affects its contact patch with the road, which can influence traction, handling, and fuel efficiency.
The 185/65R15 tire is designed to fit a wheel (or rim) with a diameter of 15 in (381 mm). The wheel supports the tire and provides a mounting point to the vehicle’s suspension. It is crucial to select a tire that matches the wheel size, as improper fitment can lead to safety concerns and reduced performance.
The sidewall of the 185/65R15 tire measures 4.7 in (120.3 mm) from the edge of the wheel to the outer surface of the tire. The sidewall height affects ride comfort, handling, and the tire’s ability to absorb road irregularities. A shorter sidewall generally offers better handling and a firmer ride, while a taller sidewall can provide a smoother, more comfortable ride.
The circumference of the 185/65R15 tire is 76.9 in (1953.3 mm), which represents the total distance around the outer edge of the tire. The circumference can impact the tire’s rolling resistance, which affects fuel efficiency and overall performance.
The 185/65R15 tire has 824 rpm (512 per km), which indicates the number of times the tire rotates as the vehicle travels one mile. This value is useful for calculating speedometer and odometer accuracy, as well as determining the impact of tire size on the vehicle’s gearing and performance.
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Please note that these values are specific to the tire size 185/65R15. It is crucial to choose the correct tire size for your vehicle, as improper fitment can lead to reduced performance, safety concerns, and even damage to your vehicle. Always consult your vehicle’s owner’s manual or a professional tire retailer to determine the appropriate tire size for your application.
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