1 Scope
This standard specifies the test method for measuring the tyre rolling circumference of agricultural tractors and machinery under load conditions.
This standard is applicable to radial or diagonal drive wheel tyres of new agricultural tractors.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 2979 Size designation, dimensions, inflation pressure and load capacity for agricultural tyres (GB/T 2979-2008, ISO 4251-1:2005, ISO 4251-2:2005, ISO 4251-4:1992, ISO 4251-5:1992, NEQ)
GB/T 3372 Rims series for tractors agricultural and forestry machines (GB/T 3372-2010, ISO 4251-3:2006, NEQ)
GB/T 6326 Tyre terms and definitions (GB/T 6326-2005, ISO 4223-1:2002, NEQ)
3 Term and definition
For the purposes of this standard, the term and definition given in GB/T 6326 and the following apply.
3.1
rolling circumference of tyre
distance that the centre of the tyre moves in one revolution of the tyre
Foreword i
1 Scope
2 Normative references
3 Term and definition
4 Principle
5 Test conditions
6 Method of test
7 Expression of results
8 Test report
9 Other test conditions
Annex A (Informative) Design guide — Agricultural tyre rolling circumference for tyres with pattern code R-1
Annex B (Informative) Agricultural tyre rolling circumference for series tyres with pattern code R-1
