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.
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Traction AA, A, B, C
Reporting safety defects (USA)Inspection
• Make sure that all component parts are free of scratches, holes and other faults.• Check the tooth contact. Drive Pinion Shaft Assembly > ADJUSTMENT• Apply CVTF to bearing and rotate the bearing to check for noise or dragging etc.• Check the bearing preload of drive pinion ...