ISO 7867-1:2018

Overview - ISO 7867-1:2018 (Metric series for agricultural, forestry and construction tyres)

ISO 7867-1:2018 defines the tyre designation, dimensions, marking, and tyre/rim coordination for the metric series of tyres used on agricultural, forestry and construction machines. It applies to diagonal, bias-belted and radial tyres mounted on 5° and 15° tapered rims and establishes the size designation system, dimensional calculation formulae, sidewall marking requirements and approved rim widths/contours. The standard supports safe mounting, interchangeability and clear product identification across the industry.

Key topics and technical requirements

• Tyre size designation: rules for nominal section width (mm), nominal aspect ratio (series, multiples of 5), construction code (D or “-” = diagonal/bias, B = bias-belted, R = radial), tyre-type prefixes (e.g., IF, VF) and suffixes (e.g., FRONT, IMP, LS, IND).
• Load classes: definitions for IF (≈20% higher rated load vs. standard) and VF (≈40% higher rated load vs. standard) tyres at the same inflation pressure.
• Marking and service description: mandatory sidewall information including tyre size designation, service description and additional product data (pictograms, maximum bead seating pressure).
• Dimensional calculation formulae: procedures for calculating design tyre dimensions, minimum/maximum overall dimensions in service, and coefficients used in those calculations.
• Tyre/rim coordination: approved rim widths, rim contours for 5° and 15° tapered rims, and guidance to ensure proper fitment and safety.
• Annexed data: design dimension tables, rim width codes, dimensional guidelines, approved rim contours and rolling circumference/speed indexes.

Practical applications - who uses ISO 7867-1:2018

• Tyre manufacturers: for product design, marking, and verifying dimensional compliance for agricultural, forestry and construction tyre ranges.
• Rim producers and wheel designers: to ensure tyre/rim compatibility and correct rim contouring and width codes.
• OEMs and equipment manufacturers (tractors, loaders, trailers): to select compatible tyres and verify fitment and performance characteristics.
• Regulatory bodies and testing labs: for conformity assessment, labeling verification and safety inspections.
• Fleet managers and procurement teams: to confirm tyre specifications, interchangeability and expected rolling circumference/indices for speed and telematics calibration.

Related standards

• ISO 7867-2 (service description and load ratings)
• ISO 4223-1 (tyre industry terms)
• ISO 4251-1 / ISO 4251-2 (diagonal/ply-rating series)
• ISO 8664 (radial tractor-drive tyres)
• ISO 18807 (logging and forestry tyres)
• ISO 13442 (construction/industrial tyres)

This standard is essential for consistent tyre designation, correct tyre/rim coordination and clear marking across agricultural, forestry and construction tyre products.