ASTM F 2779 - 10 (Reapproved 2016) Standard Practice for Commercial Radial Truck-Bus Tires to Establish Equivalent Test Severity Between a 1.707-m (67.23-in.) Diameter Roadwheel and a Flat Surface

Current edition approved Oct. 1, 2016. Published October 2016. Originally approved in 2010. Last previous edition approved in 2010 as F2779 – 10. — 8 p.
This practice describes the procedure to identify equivalent test severity conditions between a 1.707-m diameter laboratory roadwheel surface and a flat or highway surface forcommercial radial truck-bus tires.
Tire operational severity, as defined as the running or operational temperature for certain specified internal tire locations, is not the same for these two test conditions. It is typically higher for the laboratory roadwheel at equal load, speed and inflation pressure conditions due to the curvature effect.
The practice applies to specific operating conditions of load range F through L for such commercial radial truck-bus tires.