1993 Honda Civic Owner's Manual - Page 137

Tires Replacing Tires The tires that came with your Honda were selected to match the performance capabilities of the car and provide the best combination of handling, ride comfort, and long life. You should replace them with radial tires of the same size, load range, and speed rating. Mixing radial and bias-ply or bias-belted tires on your car can reduce its braking ability, traction, and steering accuracy. It is best to replace all four tires at the same time. If that is not possible or necessary, then replace the two front tires or the two rear tires as a pair. Replacing just one tire can seriously affect your car's handling. If you ever need to replace a wheel, make sure you use the same style of wheel that originally came on your Honda. Replacement wheels are available at your Honda dealer. Wheels and Tires Wheel: DX 13 x 5J U.S.: EX, EX with option package Canada: Si 14 x 5J Tire: DX P 175/70 R13 U.S.: EX, EX with option package Canada: Si P 185/60 R14 (DOT) standards. The following explains these gradings. Treadwear The treadwear grade is a comparative rating based on the wear rate of the tire when tested under controlled conditions on a specified government test course. For example, a tire graded 150 would wear one and one half (1-1/2) times as well on the government course as a tire graded 100. The relative performance of tires depends upon the actual conditions of their use, however, and may depart significantly from the norm due to variations in driving habits, service practices and differences in road characteristics and climate. DOT Tire Quality Grading (U.S. Cars) The tires on your car meet all U.S. Federal Safety Requirements. All tires are also graded for treadwear, traction, and temperature performance according to Department of Transportation Maintenance