What Your Tire Sidewall Markings Mean
Every tire has a series of numbers and letters molded into its sidewall. These aren't random - they provide vital information about the tire's specifications. Knowing how to read these codes helps you purchase the right replacements and understand your vehicle's requirements.
Breaking Down the Tire Code
The most important code looks something like this: P215/65R15 92H. Let's examine each component:
- P - Stands for Passenger vehicle (LT for Light Truck, T for Temporary spare)
- 215 - The tire's width in millimeters from sidewall to sidewall
- 65 - Aspect ratio (sidewall height as percentage of width)
- R - Radial construction (most modern tires)
- 15 - Wheel diameter in inches
- 92 - Load index (weight capacity)
- H - Speed rating (maximum safe speed)
How to Select the Right Tires for Your Vehicle
Before buying new tires, consider these factors:
- Always check your vehicle's owner manual for manufacturer recommendations
- Consider your typical driving conditions (city, highway, off-road)
- Think about climate (summer, winter, or all-season tires)
- Balance performance needs with budget constraints
- Check reviews from reliable automotive sources before purchasing
Tire Maintenance Tips for Longer Life
Proper care extends tire life and ensures safety:
- Maintain proper inflation pressure (check monthly)
- Rotate tires every 5,000-8,000 miles
- Check alignment if you notice uneven wear
- Inspect for damage after hitting potholes or curbs
- Store seasonal tires properly when not in use
When to Replace Your Tires
Watch for these warning signs:
- Tread depth below 2/32 inch (use the penny test)
- Cracks in the sidewall
- Bulges or blisters on the tire surface
- Excessive vibration while driving
- Multiple patches or repairs
This article was generated to provide general automotive advice. For specific recommendations, always consult your vehicle manufacturer or a qualified tire professional.