ISO 9413:2019

Overview

ISO 9413:2019 - Tyre valves - Dimensions and designation defines the essential dimensions, designation and identification system for tyre valves used with both tube and tubeless tyres. This third edition updates previous editions to include new valve types used for TPMS (Tire Pressure Monitoring Systems) and provides a standardized reference for valve geometry, thread/slot sizes and component identification to ensure interchangeability and safe operation.

Key topics and technical requirements

• Scope and identification: Establishes an identification system (Annex A) for valves and valve components and a designation scheme that manufacturers and users can reference.
• Nominal dimensions: All dimensions are given at nominal values unless tolerances are explicitly specified. Where thread length is not specified, the threaded length is the maximum possible.
• Valve types covered:
  • Tubeless valves: snap‑in and clamp‑in variants (including O‑ring and grommet designs), with common valve hole sizes such as 11.3 mm, 15.7 mm, and 20.5 mm illustrated.
  • Tube valves: rubber‑covered, rubber‑base, semi‑covered, screw‑on universal, large‑bore and metal‑base valves; rim slot sizes like 12.5 mm, 14 mm, 19 mm are referenced.
  • TPMS-compatible valves: inclusion of valve geometries used in TPMS applications.
• Valve components: Standardized dimensions and designations for spuds, core housings, adaptors, O‑rings, ring washers, hex/knurled nuts, grommets, valve caps and valve cores (core chambers numbered per the standard).
• Cross-references: Annex B provides correspondence between ISO designations and those of major organizations (TRA, ETRTO, JATMA) to aid international compatibility.
• Notes: Drawings in the standard are not all at the same scale; users should rely on stated dimensions.

Practical applications and users

ISO 9413:2019 is used to:

• Ensure interchangeability of valves and components across tyre and rim manufacturers.
• Guide design and manufacturing of valve stems, spuds, cores and adaptors.
• Support TPMS integration and aftermarket valve production.
• Assist quality control, conformity assessment and dimensional inspection in production and repair. Typical users:
• Tyre and rim manufacturers, valve and component producers
• Automotive OEMs and Tier‑1 suppliers
• TPMS and wheel service companies
• Testing laboratories, standards bodies and maintenance/repair workshops

Related standards

• Annex B cross‑references TRA, ETRTO and JATMA designations for global harmonization.
• For terminology and broader tyre/rim standards, consult ISO/TC 31 publications and related tyre/rim standards (see ISO catalogue).

Keywords: ISO 9413:2019, tyre valves, valve dimensions, tubeless valves, tube valves, TPMS valves, valve designation, valve components.