Owner's Manual
Page 331
... the tire section width in inches. (F) Service Description: These characters represent the load range and speed rating of the tire. For example, if the tire size aspect ratio is 60, as shown in item C of the illustration, it is certified to -width measurements. Air pressure is used to Z. (A) Passenger... sidewall to sidewall. (C) Aspect Ratio: A two-digit number that the tire's sidewall is 60 percent as high as the first character in the tire size means a passenger vehicle tire engineered to carry.
... the tire section width in inches. (F) Service Description: These characters represent the load range and speed rating of the tire. For example, if the tire size aspect ratio is 60, as shown in item C of the illustration, it is certified to -width measurements. Air pressure is used to Z. (A) Passenger... sidewall to sidewall. (C) Aspect Ratio: A two-digit number that the tire's sidewall is 60 percent as high as the first character in the tire size means a passenger vehicle tire engineered to carry.