Overview - ISO 4250-1:2023 (Earth‑mover tyres and rims - Part 1)
ISO 4250-1:2023 specifies the tyre designation and dimensional requirements for earth‑mover tyres and recommends the corresponding rims. Published as the seventh edition in April 2023, this standard applies primarily to tyres and rims intended for earth‑moving machinery defined in ISO 6165. It replaces the 2017 edition and harmonizes certain tyre size designations across the ISO 4250 series.
Key topics and technical requirements
ISO 4250-1 organizes requirements and markings related to tyre identity, sizing and in‑service dimensions. Major technical topics include:
Practical applications - who uses ISO 4250-1
ISO 4250-1 is essential for:
- Tyre and rim manufacturers (design, marking, compatibility)
- Original equipment manufacturers (OEMs) of earth‑moving machinery
- Fleet and maintenance managers specifying replacement tyres and rims
- Test laboratories and conformity assessors verifying dimensional and marking compliance
- Standards writers, procurement teams and regulators ensuring safe load/speed matching
Using ISO 4250-1 ensures consistent tyre identification, proper rim selection, and safe tyre‑to‑load/speed matching across earth‑moving equipment fleets.
Related standards
- ISO 4250-2 - Earth‑mover tyres and rims: Loads and inflation pressures
- ISO 4250-3:2020 - Earth‑mover tyres and rims: Rims
- ISO 4223-1 - Definitions for tyre industry terms
- ISO 6165 - Classification/definition of earth‑moving machinery
Keywords: ISO 4250-1:2023, earth‑mover tyres, tyre designation, tyre dimensions, rims, load index, speed symbol, radial tyres, diagonal tyres, tyre marking.
