Abstract Preview

ISO 19940:2017 specifies the testing method for determining the tyre stiffness index of passenger car tyres for the products capable of supplying the vehicle with the basic tyre functions, at least, at a speed of 80 km/h (50 mph) and a distance of 80 km when operating in flat tyre running mode, as per ISO 16992.

This method is meant to determine the above mentioned index, for the characterization of the expected tyre's stiffness through its air and structural components.

To reach the target, the vertical force and the vertical deflection, in the sense of absolute position in Z direction under different operating conditions, are measured (approximated in case of zero inflation pressure) and combined through the metrics defined in this document.

This method is not intended to be used for conventional tyres.


General information

  • Status :  Published
    Publication date : 2017-11
  • Edition : 1
    Number of pages : 13
  • :
    ISO/TC 31/SC 3
    Passenger car tyres and rims
  • 83.160.10
    Road vehicle tyres

Buy this standard

Format Language
PDF + ePub
Paper
  • CHF88

Got a question?

Check out our FAQs

Customer care
+41 22 749 08 88

Opening hours:
Monday to Friday - 09:00-12:00, 14:00-17:00 (UTC+1)

Keep up to date with ISO

Sign up to our newsletter for the latest news, views and product information