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NHTSA wants to upgrade truck tire tests

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The National Highway Traffic Safety Administration (NHTSA) wants to upgrade the federal endurance test and add a new high speed test for heavy truck tires.

NHTSA also is proposing the inclusion of maximum speed rating labeling requirements for new radial tires used on heavy truck or bus applications.

Tires to be covered under the proposal include Load Range F, G, H, J and L tires "that are not for speed-restricted service, which the agency believes comprise about  98% of the truck tires sold in the United States. These load range tires are typically used on heavy trucks for regional haul and long haul operations, as well as on motorcoaches."

In addition, NHTSA may require non-speed-restricted, Load Range M truck tires to undergo an upgraded endurance test and the new high speed test.

NHTSA's proposals would go into effect two years "after publication of a final rule." It currently is seeking public comment.

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