ISO 4223-1:2017 defines a number of significant terms related to pneumatic tyres used in the tyre industry, together with corresponding codes, symbols and values. NOTE 1 For other terms used in this field and their equivalents in other languages, see ISO 3877 (all parts). For terms and definitions relating to wheels/rims, see ISO 3911. NOTE 2 Annex A forms a normative part of this document.