SAE J2452

SAE J2452 is a standard defined by the Society of Automotive Engineers[1] to measure the rolling resistance of tires.

[2] Where the older standard, SAE J1269, produces measurements of rolling resistance under steady-state (i.e. thermally equilibrated) operating conditions, SAE J2452 produces measurements during a transient history of speed that is intended to mimic a vehicle coastdown event.

During the SAE J2452 test, the tire is not in thermal equilibrium, but the coastdown event is rapid enough that the tire operates at a roughly iso-thermal condition.

Tire pressure, vehicle weight and velocity all play a role in how much force is lost to rolling resistance.

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