2013 Nissan Leaf Owner's Manual - Page 381

FLAT TOWING Towing your vehicle with all four wheels on the ground is sometimes called flat towing. This method is typically used when towing a vehicle behind a recreational vehicle, such as a motor home. CAUTION • Failure to follow these guidelines can result in severe reduction gear damage. • DO NOT tow this vehicle with all four wheels on the ground (flat towing). • For emergency towing procedures refer to ؆Towing your vehicle؆ in the ؆In case of emergencyЉ section of this manual. UNIFORM TIRE QUALITY GRADING DOT (Department Of Transportation) Quality Grades: All passenger car tires must conform to federal safety requirements in addition to these grades. Quality grades can be found where applicable on the tire sidewall between tread shoulder and maximum section width. For example: Treadwear 200 Traction AA Temperature A TRACTION AA, A, B AND C The traction grades, from highest to lowest, are AA, A, B and C. Those grades represent the tire's ability to stop on wet pavement as measured under controlled conditions on specified government test surfaces of asphalt and concrete. A tire marked C may have poor traction performance. WARNING The traction grade assigned to this tire is based on straight-ahead braking traction tests, and does not include acceleration, cornering, hydroplaning, or peak traction characteristics. 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 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. 9-14 Technical and consumer information