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Related Categories: Tire Size Substitution | Rim Size Calculator | Rim Width Tire Size | Sidewall Height | Tire Psi Chart | Changing Aspect Ratio | Staggered Wheels Fitment | White Wall Tires | Tire Pressure Calculator | Plus Size Calculator
  • Tire Sizing

  • Let's look at tire sizing for a moment. POP QUIZ 195/70R14 205/60R15 245/45R16 Which of these tires is the widest, and which is the tallest in overall diameter? Dissecting the code you find the the first number 195 is the actual width of the tire in millimeters. Divide this by the 25.4 to get…

  • Tire Size Guide | Tire Rack

  • …tire size's section width is 225mm and that its section height is 50% of 225mm. By converting the 225mm to inches (225 / 25.4 = 8.86") and multiplying it by 50% (.50) we confirm that this tire size results in a tire section height of 4.43". If this tire were a P225/70R16 size, our calculation would…

  • Looking for Bigger Tires?

  • …tire, so you may need to do some measuring of your own and decide for yourself what tire size you want. The first possible problem with larger diameter tires is the speedometer calibration. Your vehicle calculates your current rate of speed based on the factory tire diameter, so if you put a bigger…

  • Touch of Grey for Your Chevy Impala

  • …and LT size is 225/60-16 (26.7" overall diameter) and 235/50-18 (27.3" overall diameter) which are about a half-inch wider, while the 245/45-18 (26.7" overall diameter) is approximately another half-inch wider compared to the 235/50-18. For more on tire sizing, read "Calculating


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