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ASTM F870-94(2016)
- Standard Practice for Tread Footprints of Passenger Car Tires Groove Area Fraction and Dimensional Measurements
- standard by ASTM International, 01/01/2016
- Publisher: ASTM
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1.1 This practice covers a technique for measuring the groove or void area of a tire tread pattern. The void area is measured on the inked impression of a tire tread statically loaded against heavyweight paper on a load platen.