BRZ _ U . book 406 ページ 2022 年 3 月 29 日 火曜日 午後 3 時 59 分
406
Reporting Safety Defects ( USA ) 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 straightahead braking traction tests , and does not include acceleration , cornering , hydroplaning , or peak traction characteristics .
■ TEMPERATURE A , B , C
The temperature grades are A ( the highest ), B , and C , representing the tire ’ s resistance to the generation of heat and its ability to dissipate heat when tested under controlled conditions on a specified indoor laboratory test wheel . Sustained high temperature can cause the material of the tire to degenerate and reduce tire life , and excessive temperature can lead to sudden tire failure . The grade C corresponds to a level of performance which all passenger
car tires must meet under the Federal Motor Vehicle Safety Standard No . 109 . Grades B and A represent higher levels of performance on the laboratory test wheel than the minimum required by law .
WARNING
The temperature grade for this tire is established for a tire that is properly inflated and not overloaded . Excessive speed , underinflation , or excessive loading , either separately or in combination , can cause heat buildup and possible tire failure .
1
D
If a o s N A to
If c g d it c c v d T V 8 9 w A J W a