J2452_201707 Stepwise Coastdown Methodology for Measuring Tire Rolling Resistance

Revised

07/26/2017

Features
Issuing Committee
Scope
Content
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 °C and 28 °C (68 °F and 82 °F) 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. Two basic measurement methods covered by this document are as follows:
Rationale
Content
The revisions in this version are to address missing SI units a typo in section 3.10 and to clarify issues associated with zero speed points in the MERF/SMERF calculations.
Meta TagsDetails
DOI
https://doi.org/10.4271/J2452_201707
Pages
39
Citation
SAE International Recommended Practice, Stepwise Coastdown Methodology for Measuring Tire Rolling Resistance, SAE Standard J2452_201707, Revised July 2017, Issued June 1999, https://doi.org/10.4271/J2452_201707.
Additional Details
Publisher
Published
Jul 26, 2017
Product Code
J2452_201707
Content Type
Recommended Practice
Status
Revised
Language
English

Revisions