Overview
ISO 10571:2016 - "Tyres for mobile cranes and similar specialized machines" defines designation, dimensions, load ratings and reference speeds for tyres and rims fitted to vehicles such as mobile cranes, all‑terrain equipment and crash tenders that operate on highways over long distances under constant load. This third edition (2016) replaces ISO 10571:2011 and provides standardized marking, dimensional data, load tables and approved rim contours for 80‑series and 95‑series tyres.
Key topics and requirements
- Tyre designation and marking: Mandatory sidewall information includes nominal section width (mm, ending in “5”), nominal aspect ratio (multiple of 5), construction code (dash for bias; “R” for radial), nominal rim diameter code and service description (load index + speed symbol).
- Service identifiers: Regional options include marking “ROAD” and regional load range markings. Example: 605/80R25 188E ROAD Load Range L (10 000 kg at speed symbol E, reference inflation 700 kPa).
- Speed symbols and reference speeds: Speed symbol E = 70 km/h and F = 80 km/h. Speed symbol E and F tyres are not interchangeable because load‑carrying capacity differs with speed.
- Load index and TLCC: Load index correlates to tyre load‑carrying capacity (TLCC). For example, load index 188 = 10 000 kg (see Table 1).
- Load vs speed adjustments: Tables specify percent variations of load capacity at operating speeds different from the reference (e.g., E‑tyres decline to 82% at 80 km/h).
- Tyre dimensions and series: Design and in‑service dimensions are provided for 95‑series and 80‑series tyres (section width, overall diameter, maximum in‑service size).
- Approved rims and contours: Specific rim contours and measuring rim width codes are listed (refer to ISO 4250‑3 for rim dimensions). Manufacturers should confirm tyre/wheel assembly suitability.
- Nominal section width steps: Annex A defines incremental steps per size ranges.
Applications and who uses it
ISO 10571:2016 is used by:
- Tyre manufacturers - to design, mark and certify tyres for mobile cranes and specialized vehicles.
- Crane OEMs and fleet operators - for correct tyre selection (series, load index, speed symbol, load range) to match vehicle performance and intended service.
- Maintenance and safety inspectors - to verify sidewall markings, inflation pressures and load ratings for road operations.
- Procurement and regulatory bodies - to specify compliant tyre/rim assemblies for on‑road mobile crane use.
Practical value: ensures compatibility of tyre/rim assemblies, prevents overloading at highway speeds, and standardizes markings to improve safety and interchangeability.
Related standards
Keywords: ISO 10571:2016, tyres for mobile cranes, mobile crane tyres, tyre load ratings, speed symbol E, speed symbol F, tyre designation, rim contours, load index, load range.
