Find the tire size on the sidewall
Read the width in millimeters
Read the aspect ratio as a percentage
Read the construction type
Read the wheel diameter in inches
Check the load index
Check the speed rating
Find the DOT code
Read the manufacturing date
Check the treadwear, traction, and temperature ratings
Look for maximum inflation pressure
Look for maximum load capacity
Check for rotation direction if marked
Check for load range or ply rating if marked
Check for run-flat or other special markings if present