This SAE Recommended Practice provides a method for testing the speed performance of passenger car tires under controlled conditions in the laboratory on a test wheel. This procedure applies to "standard load, " "extra load, " and "T-type high pressure temporary use spare" passenger tires.
SAE J1561-2001 history
2019SAE J1561-2019 Laboratory Speed Test Procedure for Passenger Car Tires
2001SAE J1561-2001 Laboratory Speed Test Procedure for Passenger Car Tires
1993SAE J1561-1993 Laboratory Speed Test Procedure for Passenger Car Tires@ Recommended Practice (February 1993)
1988SAE J1561-1988 Laboratory Speed Test Procedure for Passenger Car Tires