Stepwise Coastdown Methodology for Measuring Tire Rolling Resistance

Document Number: J2452
Date Published: June 1999

Issuing Committee:
Highway Tire Forum Steering Committee

Scope:
This SAE Recommended Practice is applicable to pneumatic Passenger Car ""P"" Type, Light Truck Metric, and Light Truck High Flotation tires, or similar tires approved by bodies other than Tire & Rim Association. The methodology is applicable within normal operating ranges of vertical load and inflation pressure, and for velocities between 115 km/h and 15 km/h (71 mph and 9 mph) during a relatively short duration event such as a coastdown. This procedure is applicable only to operation in the free-rolling mode at zero slip and camber angle for ambient temperatures between 20 \mDC and 28 \mDC (68 \mDF and 82 \mDF) and for surfaces with diameters of 1.2 m (48 in) diameter or greater. Details regarding the equipment, tires, and test methods used specifically for validation of this document are included in Appendix A.

Product Status: In Stock

File Size: 1278K

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