Overview
ISO 10571:2024 - “Tyres for mobile cranes and similar specialized machines” defines designation, dimensions, load ratings and reference speeds for tyres and rims fitted to vehicles (for example all‑terrain equipment, mobile cranes and crash tenders) that are likely to operate on public roads over long distances at a reference speed under constant load. This fourth edition updates tyre and rim tables, adds definitions (road, driving on the road, creep, stationary) and clarifies service markings and load/speed relationships for crane tyres.
Key topics
- Tyre designation and marking: Mandatory sidewall information includes nominal section width, aspect ratio, construction code (radial “R” or dash for bias), rim diameter code, load index and speed symbol (E = 70 km/h, F = 80 km/h). Optional regional markings include “ROAD” service ID and Load Range.
- Dimensions and series: Design and in‑service dimensions are provided for common series (notably 95 and 80 series tyres), including measuring rim width, section width and overall diameter.
- Load ratings and speed interaction: Tables map load index to tyre load‑carrying capacity (TLCC) and define basic tyre loads at reference speeds. Important: E and F speed‑rated tyres are not interchangeable because their load capabilities at the same speed differ.
- Load range and inflation: Correlation of load range to reference inflation pressure is specified (e.g., Load Range L → 700 kPa, N → 900 kPa) - regional options may apply.
- Approved rims and contours: Approved rim contours and references to rim dimension standards (ISO 4250‑3) are included.
- Other markings: Requirements for “TUBELESS”, preferred rotation arrows and optional “RADIAL” wording.
Applications
- Tyre manufacturers: design, label, certify and publish load/speed tables for crane tyres and approved rim combinations.
- Crane OEMs and fleet specifiers: select tyres and rims that meet load, speed and dimensional requirements for on‑road and mixed‑use machines.
- Fleet managers & procurement: ensure correct tyre selection (load index, speed symbol, inflation) to comply with safety, regulatory and warranty requirements.
- Test laboratories & certification bodies: verify tyre marking, load capacity, rim compatibility and conformity with ISO 10571:2024.
- Regulators and standards committees: reference for national regulations and for alignment with related documents (ISO 17253 for machinery, ISO 4223‑1 for definitions).
Related standards
- ISO 17253 - machinery types referenced in the introduction
- ISO 4209‑1 - truck and bus tyres and rims (metric series)
- ISO 4223‑1 - tyre industry definitions
- ISO 4250‑3 - earth‑mover rims (rim dimensions and codes)
- ISO 3877‑1 - equivalent tyre industry terminology
For implementation details, tables and exact numeric values (dimension tables, TLCC mapping and rim contours), consult the full ISO 10571:2024 publication or your national standards body.
