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Rolling Resistance Metric

Rule Map–> Testing Requirements–>ROLLING RESISTANCE METRIC Rolling resistance is the force required to make tires roll and is a characteristic that affects a tire’s fuel efficiency. NHTSA is proposing both a particular rolling resistance metric and a testing procedure manufacturers must use. The results of the rolling resistance test will determine the tire’s fuel efficiency [...]

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"Have Your Say" is a "blog" that will run a series of short articles ("posts") about the proposed rule. These are written by the site moderators; a new one will appear every day. The most recent one is listed first; find earlier posts at the bottom of the page or in the Archives (left column). Arrange for new Have Your Say posts to come automatically to your email by clicking the small orange "RSS" button above.

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Each "Dig in" article is a summary, written by the site moderators, of the agency’s reasoning on an important issue in the proposed rule. The summary will also point you to any data or studies the agency relies on. See all the available summaries by clicking "Rule Map" (left column).

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