ISO/TC 31/SC 5 - Agricultural tyres and rims

This document specifies rim dimensions for rims for agricultural, forestry, and construction machines.

This document specifies the designation, dimensions, approved rim contours, load ratings and reference speeds for agricultural tyres fitted to construction machines (e.g. backhoe loaders, small dumpers, loaders, excavators) operating on building sites under loading and transport conditions. Tyres conforming to this document are identified by the suffix IND in the tyre size designation; code designated tyres can alternatively, in place of the suffix IND, be identified by the classification code R-4. NOTE Agricultural tyres without the suffix IND in the tyre size designation or with a classification code differing from "R-4" are not part of this document. Code designated diagonal tyres (ply rating marked series) for agricultural tractors, trailers and machines are part of ISO 4251-1 and ISO 4251-2. Code designated radial tyres for agricultural tractors, trailers and machines are part of ISO 8664. Metric designated tyres for agricultural tractors, trailers and machines are part of ISO 7867-2. Tyres for forestry machines, identified by suffix LS, or classification code LS-x are part of ISO 18807.

This document sets out the marking, the tyre size designation, the dimensions, the load ratings and the rim coordination for logging and forestry service tyres in diagonal and radial construction. Rim dimensions are given in ISO 18804.

This document establishes the load ratings of the diagonal code designated (ply rating marked series) tyres for agricultural tractors, trailers and machines. Tyre designation and dimensions, and approved rim contours are given in ISO 4251‑1. NOTE Code designated diagonal tyres (ply rating marked series) for construction applications (industrial tractors), identified by the classification code R-4, as specified in ISO 18805, or by suffix "IND" are part of ISO 13442. Code designated diagonal tyres (ply rating marked series) for forestry machines, identified by the classification code LS, as specified in ISO 18805, are covered by ISO 18807.

This document establishes the designation in use and the dimensions of code designated tyres in diagonal construction (ply rating marked series) for agricultural tractors, trailers and machines. Tyre load ratings are given in ISO 4251‑2. NOTE Code designated diagonal tyres (ply rating marked series) for construction applications (industrial tractors), identified by the classification code R-4, as specified in ISO 18805, or by suffix "IND" are covered by ISO 13442. Code designated tyres in radial construction for drive wheels of agricultural tractors are covered by ISO 8664. Code designated diagonal tyres (ply rating marked series) for forestry machines, identified by the classification code LS, as specified in ISO 18805, are covered by ISO 18807.

This document establishes the tyre size designation, the dimensional calculation formulae, the markings and the tyre and rim coordination for the metric series of tyres primarily intended for use on agricultural and forestry tractors, machines, equipment and trailers and for construction machines. It applies to diagonal, bias-belted and radial tyres mounted on 5° and 15° tapered rims. NOTE Code designated series of: — diagonal (ply rating marked) tyres for agricultural tractors and machines are specified in ISO 4251-1 and ISO 4251-2; — radial (service description marked) tyres for agricultural tractor-drive-wheel tyres are specified in ISO 8664; — tyres for logging and forestry machines are specified in ISO 18807[1]; — tyres for construction/industrial tractors are specified in ISO 13442. [1] Under preparation. Stage at the moment of publication ISO/DIS 18807:2018.

This document establishes the service description, the tyre load ratings for basic and special applications and reference inflation pressure for the metric series of tyres primarily intended for agricultural tractors, machines, equipment and their trailers. It applies to diagonal, bias belted and radial tyres mounted on 5° and 15° tapered rims. NOTE The service description, the tyre load ratings for basic and special applications and reference inflation pressure for the metric series of: — tyres for logging and forestry machines are specified in ISO 18807; — tyres for construction/industrial tractors are specified in ISO 13442.

This document specifies the marking, dimensions, load ratings and reference speeds for code-designated agricultural tractor drive-wheel tyres with service description (load index and speed symbol). It applies to tyres of radial construction in the speed categories 40 km/h (speed symbol A8), and 50 km/h (speed symbol B). NOTE Code designated series of: — diagonal (ply rating marked) tyres for agricultural tractors and machines are specified in ISO 4251‑1 and ISO 4251‑2; — tyres for logging and forestry machines are specified in ISO 18807[1]; — tyres for construction/industrial tractors are specified in ISO 13442. [1] To be published.

This document specifies the method for measuring rolling circumference for new tyres, under loaded conditions, made for use on agricultural tractors and machines, and applies to agricultural tractor drive wheel tyres in diagonal and radial construction. It also includes an explanation of the rolling circumference index (RCI) and speed radius index (SRI).

ISO 18805:2017 specifies the classification codes for agricultural and forestry tractors and machines.

ISO 18804 specifies rim dimensions for rims for agricultural, forestry, and construction machines. All dimensions in ISO 18804 are given in millimetres and are applicable to the side of rim which is in contact with the tyre during the mounting and in service. NOTE Terms used are in accordance with ISO 3911.

ISO 4251-2:2017 establishes the load ratings of the ply rating marked series of tyres for agricultural tractors and machines. Tyre designation and dimensions, and approved rim contours are given in ISO 4251‑1.

ISO 4251-1:2017 establishes the designation in use and the dimensions of the ply rating marked series of tyres for agricultural tractors and machines. Tyre load ratings are given in ISO 4251‑2.

ISO 4251‑4:2010 specifies the classification codes and nomenclature of the ply rating marked series of tyres for agricultural tractors and machines.

ISO 4251-3:2006 specifies rim dimensions for the ply rating marked series of tyres for agricultural tractors and machines.

ISO 4251-2:2005 specifies load ratings for the ply rating marked series of tyres for agricultural tractors and machines. Tyre designation and dimensions, and approved rim contours, rim dimensions, and tyre classification and nomenclature are given in ISO 4251-1, ISO 4251-3 and ISO 4251-4 respectively.

ISO 4251-1:2005 establishes the designation in use and the dimensions of the ply rating marked series of tyres for agricultural tractors and machines. Tyre load ratings, rim dimensions, and tyre classification and nomenclature are given in ISO 4251-2, ISO 4251-3 and ISO 4251-4 respectively.

ISO 7867-2:2005 establishes the service description, the tyre load ratings in basic and special applications, and reference inflation pressure increments for the metric series of tyres primarily intended for agricultural tractors and machines. It applies to bias-belted, diagonal and radial tyres mounted on 5° tapered rims, as specified in ISO 4251-3. It also applies to different concepts and types of tyres and rims; in these cases, however, appropriate load/speed curves and reference inflation pressure increments will be established and added. Basic tyre load-carrying capacities for ranges of existing tyres are also given.

ISO 7867-1:2005 establishes the size designation, the dimensional calculation and the markings of the metric series of tyres primarily intended for use on agricultural tractors and machines. Tyre and rim coordination is also given. ISO 7867-1:2005 applies to bias-belted, diagonal and radial tyres mounted an 5° tapered rims, as specified in ISO 4251-3. Only established rim diameters and widths within the ranges in Tables 1 and 2 are recommended. ISO 7867-1:2005 also applies to different concepts and types of tyres and rims; in this case, however, appropriate rim/section ratios K1 and coefficients K2, a and b will be established and added. Dimensions of existing rims are specified in ISO 4251-3.

ISO 8664:2005 specifies the marking, dimensions, load ratings and reference speeds for existing series of agricultural tractor drive-wheel tyres with service description (load index and speed symbol). It applies to tyres of radial construction in the speed categories 30 km/h (speed symbol A6), 40 km/h (speed symbol A8), and 50 km/h (speed symbol B)

Contains additions for table 2, corrects table A.4 and replaces the existing table A.5.

Establishes the service description and the tyre load ratings in basic and special applications for the metric series of tyres for agricultural tractors and machines.

Establishes the size designation, the dimensional calculation and the markings of the metric series of tyres for use on agricultural tractors and machines. Replaces the second edition.

Cancels and replaces the second edition (1985). Sets out rim dimensions for tyres of the ply rating marked series for agricultural tractors and machines.

Specifies the marking, dimensions, load ratings and reference speeds for existing series of tyres. Applies to tyres of radial construction in the speed categories 30 km/h and 40 km/h.

Tabulates the classification codes R (R-1 to R-4), F (F-1 to F-3), I (I-1 to I-6), G (G-1 to G-3) and LS (LS-2 and LS-3).

Describes the designation, dimensions, load ratings and rim coordination for tyres of diagonal construction. Gives terms and definitions.