How to Read Your Tire Size to Find the Right Tire Chains
Understanding your tire size is crucial for selecting the correct tire chains, ensuring a snug fit and optimal performance in snowy or icy conditions. The tire size is displayed on the sidewall of your tire as a combination of numbers and letters. Here’s how to decode it to choose the perfect snow chains or tire chains:
Example: 205/55R16 91H
This diagram breaks down each element of the tire size, helping you understand what the numbers and letters represent. Let’s go through them step by step:
1. Tire Type
Indicates the type of tire, such as:
P: Passenger vehicle tire.
LT: Light truck tire.
T: Temporary tire (spares).
When purchasing tire chains, ensure compatibility with your tire type.
2. Section Width (205)
The width of the tire from sidewall to sidewall, measured in millimeters.
This tire is 205 mm wide. Snow chains must match this width for a secure fit.
3. Aspect Ratio (55)
The height of the tire’s sidewall as a percentage of its width.
A ratio of 55 means the height is 55% of the width. This helps determine chain clearance.
4. Tire Construction (R)
Indicates the tire’s internal structure.
R: Radial construction.
B: Bias-ply.
Most tire chains are designed for radial tires.
5. Wheel Diameter (16)
The diameter of the wheel that the tire fits, measured in inches.
This tire fits a 16-inch wheel, and chains must match this size.
6. Load Index (91)
A numerical value representing the maximum weight capacity of the tire.
7. Speed Rating (H)
The maximum speed the tire can handle safely.
H corresponds to 130 mph (210 km/h).
Some tire chains come with speed restrictions.
Why Tire Size Matters for Tire Chains
Selecting snow chains based on your tire size ensures a precise fit, critical for safe driving in winter conditions. A proper fit prevents slippage and reduces the risk of damage to your tires or vehicle.