Tire Size What Does It Mean

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Tire Size What Does It Mean
Related Categories: What Tires Will Fit My Car | Can I Change My Tire Size | Speed Rating Letters | What Does The Numbers Mean | Recommended Tire Pressure | What Size Rim Will Fit My Tire | What Is The Proper Tire Pressure | Will The Wheel Fit My Car | When To Put On Snow Tires | Wheel Offset And Backspacing

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  • What's in a letter?

  • T, Z, W...These letters appear on a tire, but what do they mean? Speed ratings can be a little confusing. I get many calls like this one: "I have an 08 BMW 328i and I need a Z-rated tire." To be honest, Z-rated used to mean a lot more than it does now. When speed ratings first came out, Z was thought…


  • …wheels? * How do you know what wheel fits my vehicle? * What does offset mean? How does it relate to backspacing? * What is the purpose of centering rings? Are they required? * Why do I need to re-torque the lug hardware on new wheels? * What happens if I don't buy Tire Pressure Monitoring System…

  • What Does "ZR" Mean?

  • Tire sizes have letters in them, but they don't always have the same letters. You're probably familiar with the "P" or the "LT" that sometimes shows up at the beginning of the size, and the "R" right before the wheel size, for example P245/40R18 or LT315/70R17. But what does it mean when the tire says…

  • What Does 'XL' Stand For?

  • …different size. When talking about tires, XL really means extra load. These tires can use higher air pressure to support more weight than a standard tire of the same size. If you want to see whether your current tires are standard or extra load, you can check the service description on the tire's sidewall…


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