Rolling Resistance

Smithers Rapra laboratories are ISO 17025 accredited and can perform a variety of tests to evaluate the rolling resistance on a variety of tires types including evaluations in accordance with UNECE R117.

Fuel prices and greater awareness about the role tires have in improving fuel economy has created renewed interest in rolling resistance evaluations. A tires rolling resistance impacts on fuel economy through a combination of heat loss, aerodynamic drag and the friction between tires and road surfaces. Rolling resistance can be performed on the following tire types:

  • Bicycle
  • Passenger and Light Truck
  • Medium-Duty Truck
  • Super Single Truck
  • Dual Assemblies
  • OTR
  • Tow Motor
  • Motorcycle

 To assist in consistent evaluation, tests are conducted to industry standards including:

  • SAE J1269
  • SAE J2452
  • ISO 8767:1992
  • ISO 28580

Certification & Accreditation

EU tyre label

Smithers Rapra's Ravenna, Ohio and Suzhou China labs are correlated for the measurement of tire rolling resistance with the Global Network of Reference Laboratories, as defined in (EC) No 1222/2009. This alignment allows clients to report rolling resistance data for the purposes of EU tire labeling requirements - UNECE Regulation No. 117 (R117).

All Smithers laboratories are ISO 17025 accredited. Smithers Rapra is also the National Tire Reference Laboratory for Rolling Resistance as chosen by the National Highway and Traffic Safety Administration (NHTSA). Smithers was chosen due to our expertise and quality controls to maintain the highest level of accuracy in our testing.

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