Understanding the 275/35R15 Tire Size
The tire size designation 275/35R15 provides specific information about the tire's dimensions and construction. Here's a breakdown of what each component means:
-
275: This is the tire's width in millimeters. It indicates the section width of the tire from sidewall to sidewall.
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35: This is the aspect ratio, a percentage that represents the height of the tire's sidewall as a percentage of its width. In this case, the sidewall height is 35% of 275 mm.
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R: This indicates the tire's construction type, which is radial.
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15: This is the wheel diameter in inches that the tire is designed to fit.
How to Convert 275/35R15 Into Inches
Converting tire dimensions from metric to imperial units involves a few calculations:
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Width: 275 mm ÷ 25.4 = 10.83 inches
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Sidewall Height: 275 mm × 0.35 = 96.25 mm, which is 96.25 mm ÷ 25.4 = 3.79 inches
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Overall Diameter: (96.25 mm × 2) + (15 inches × 25.4 mm/inch) = 330.5 mm + 381 mm = 711.5 mm, which is 711.5 mm ÷ 25.4 = 28.01 inches
Detailed Conversion Table
|
Measurement |
Metric (mm) |
Imperial (inches) |
|
Width |
275 mm |
10.83 inches |
|
Sidewall Height |
96.25 mm |
3.79 inches |
|
Overall Diameter |
711.5 mm |
28.01 inches |
Quick Conversion Tips
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Use the conversion factor: 1 inch = 25.4 mm.
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To estimate, remember that 275 mm is roughly 11 inches.
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For quick sidewall height: multiply width by aspect ratio percentage and convert.
Technical Specifications and Dimensions
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Width: 275 mm (10.83 inches)
-
Sidewall Height: 96.25 mm (3.79 inches)
-
Overall Diameter: 711.5 mm (28.01 inches)
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Load Index: Typically ranges from 89 to 95, depending on the brand.
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Speed Rating: Often rated as V (up to 149 mph) or W (up to 168 mph).
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Recommended Tire Pressure: Generally between 32-35 PSI (220-240 kPa).
-
Tread Depth: New tires usually have a tread depth of 10/32" to 12/32".
Compatible Vehicles for 275/35R15
The 275/35R15 tire size is commonly used on performance vehicles and classic cars. Here are some examples:
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Porsche 911 (1970s-1980s): Classic models often use this size for performance upgrades.
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Ford Mustang (1970s): Suitable for certain models with modified suspension setups.
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Chevrolet Camaro (1970s): Often used in racing and performance applications.
When considering this tire size, ensure that your vehicle's wheel wells can accommodate the width and diameter. Suspension modifications may be necessary for proper fitment.
Size Comparison and Alternatives
When selecting alternative tire sizes, it's crucial to stay within a 3% diameter variation to maintain speedometer accuracy and vehicle handling. Here are some comparable sizes:
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265/40R15: Offers a slightly narrower width and taller sidewall.
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285/30R15: Provides a wider stance with a lower profile.
Always consult with a tire professional to ensure compatibility with your vehicle's specifications.
FAQ Section
What is the recommended tire pressure for 275/35R15 tires?
The recommended tire pressure for 275/35R15 tires typically ranges from 32 to 35 PSI (220 to 240 kPa). It's important to check your vehicle's manual for specific recommendations and adjust based on load and driving conditions.
Can I use a different tire size than 275/35R15?
Yes, you can use a different tire size, but it's important to ensure the overall diameter remains within a 3% range to avoid affecting vehicle performance and safety. Consult with a tire specialist for suitable alternatives.
What is the width and height of a 275/35R15 tire?
The width of a 275/35R15 tire is 275 mm (10.83 inches), and the sidewall height is 96.25 mm (3.79 inches). The overall diameter is 711.5 mm (28.01 inches), which influences handling and ride comfort.
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