How to Read Tire Labels: A Guide by Tire Type

Tire labels aren’t just random numbers and letters—they’re a roadmap to finding the perfect tire for your needs. Whether you’re buying tires for a car, RV, tractor, or motorcycle, these labels provide essential information about size, performance, and suitability. At Tread Traders, we’re here to help you understand tire labels across all categories, so you can shop with confidence.

Here’s a detailed guide to decoding tire labels for a wide range of tire categories.

Passenger and Light Truck Tires

These are the most common tires, designed for cars, SUVs, and light trucks.

Example Label: P225/60R17 99H

• P: Indicates a passenger vehicle tire. “LT” would denote a light truck tire.
• 225: Width of the tire in millimeters (sidewall to sidewall).
• 60: Aspect ratio, showing the sidewall height as a percentage of the width.
• R: Radial construction.
• 17: Rim diameter in inches.
• 99H: Load index (99 = 1,709 lbs) and speed rating (H = up to 130 mph).

Key Features:

• • Seasonal Markings: Look for symbols like M+S (Mud + Snow) or the Three-Peak Mountain Snowflake (3PMS) for winter tires.
• Treadwear, Traction, and Temperature Grades: Found in the UTQG rating for performance comparison.

Competition and Track Tires

Designed for high-speed racing or track use, these tires prioritize grip and performance over durability.

Example Label: 245/40ZR18 93Y

• Z: Indicates the tire’s ability to handle speeds over 149 mph.
• Y: Specific maximum speed rating (up to 186 mph).

Key Features:

• Tread Design: Often semi-slick or slick for maximum grip.
• Compound: Softer rubber for better traction at high speeds.
• Markings: May include “DOT Approved” for street-legal track tires.

RV, Trailer, and Medium-Duty Commercial Tires

These tires support heavy loads and extended travel.

Example Label: ST225/75R15 117L

• ST: Special Trailer tire, designed specifically for towing applications.
• 225: Tire width in millimeters.
• 75: Aspect ratio.
• R15: Radial construction with a 15-inch rim diameter.
• 117L: Load index (2,833 lbs) and speed rating (L = up to 75 mph).

Additional Features for Medium-Duty/Commercial Tires:

• Ply Rating (PR): Indicates strength; higher numbers mean greater load capacity.
• Tread Design: Optimized for durability and fuel efficiency.
• Regroovable Markings: Found on some commercial tires to indicate they can be regrooved for extended life.

Farm, Agriculture, and Industrial/OTR Tires

These tires are designed for specialized tasks in rugged or soft terrain.

Example Labels:

• Agriculture: 18.4R38

·18.4: Width in inches.

·R: Radial construction.

·38: Rim diameter in inches.

• Industrial/OTR: 23.5R25

·23.5: Width in inches.

·R: Radial.

·25: Rim diameter in inches.

Key Features:

• Tread Types:

·R-1 (General farming), R-1W (Wet/muddy conditions).

·E-3/L-5/G-2 for industrial use (Earthmoving, Loader, Grader).

• Flotation Ratings: For reducing soil compaction in agriculture.
• Ply Ratings: For durability in heavy-duty applications.

ATV, UTV, and Lawn/Garden Tires

These smaller tires are designed for off-road vehicles and landscaping equipment.

Example Labels:

• ATV/UTV: 25×8-12

·25: Overall tire height in inches.

·8: Width in inches.

·12: Rim diameter in inches.

• Lawn/Garden: 16×6.50-8

·16: Height, 6.50: Width, 8: Rim diameter.

Key Features:

• Tread Patterns: Knobby for ATV/UTV off-road traction. Ribbed or smooth for lawn mowers to avoid turf damage.
• Load Ratings: Important for utility vehicles carrying cargo.

Motorcycle Tires

Motorcycle tires are designed for stability, speed, and traction on two wheels.

Example Label: 120/70ZR17 58W

• 120: Tire width in millimeters.
• 70: Aspect ratio.
• Z: High-speed capability (over 149 mph).
• R: Radial construction.
• 17: Rim diameter in inches.
• 58W: Load index (520 lbs) and speed rating (up to 168 mph).

Key Features:

• Dual-Sport Tires: For both on- and off-road use.
• Bias-Ply vs. Radial: Bias-ply for durability, radial for performance.

Why Understanding Tire Labels Is Important

Reading and interpreting tire labels helps ensure safety, performance, and value—whether you’re replacing car tires, outfitting heavy machinery, or gearing up for the racetrack. Choosing the right tire can enhance your vehicle’s efficiency, longevity, and reliability.

Shop and Sell Tires with Confidence on Tread Traders

At Tread Traders, we make it easy to buy and sell tires for every category. Whether you need a new set of passenger tires, specialized agricultural tires, or high-performance track tires, our platform connects you with the right sellers at competitive prices.