Owners Manual
Page 546
...on uniform tire quality grading. The treadwear grade is a comparative rating based on a specified government test course. A tire marked C may have poor traction performance. Your Lexus dealer will help answer any questions you read this information. For example: Treadwear 200 Traction AA ... from the norm due to variations in driving habits, service practices and differences in road characteristics and climate. It provides the purchasers and/or prospective purchasers of Lexus vehicles with regulations issued by the National Highway Traffic Safety Administration of the U.S. CHASSIS...
...on uniform tire quality grading. The treadwear grade is a comparative rating based on a specified government test course. A tire marked C may have poor traction performance. Your Lexus dealer will help answer any questions you read this information. For example: Treadwear 200 Traction AA ... from the norm due to variations in driving habits, service practices and differences in road characteristics and climate. It provides the purchasers and/or prospective purchasers of Lexus vehicles with regulations issued by the National Highway Traffic Safety Administration of the U.S. CHASSIS...