ISO 4251-1:2005 pdf download.Tyres (ply rating marked series) and rims for agricultural tractors and machines —Part 1: Tyre designation and dimensions,and approved rim contours.
a) Table 1 for tyres of diagonal construction with normal section height;
b) Table 2 for tyres of diagonal oonstwction with low section height;
C) Table 3 for tyres of diagonal construction for special cultivation work;
d) Table 4 for tyres of radial construction for special cultivation work.
5.2 Agricultural steenng wheels — Tractor tyres
Tyre size designations. measurement rims, design dimensions of new tyres, and maximum tyre dimensions in service are given in
a) Table 5 for tyres of diagonal construction with normal section height;
b) Table 6 for tyres of diagonal construction with low section height.
5.3 Agricultural implement tyres
Tyre size designations. measurement rims, design dimensions of new tyres, ana maximum tyre aimensions in service are given In
a) Table 8 for tyres of diagonal construction with normal section height;
b) Table 9 for tyres of thagonal construction with low section height.
6 Radius index
Radius indices are parameters which are used exclusively for the calculation of forward ground speed during homologahon procedures (see for further Information ISO 3965).
Values are given in Table 7 for tyres of diagonal and radial constructions with normal section height and for agricultural tractor drive wheel tyres of diagonal construction with low section height.
They apply to tyres inflated to the recommended inflation pressures given In ISO 4251-2 and having a load per tyre corresponding to 50 % of the maximiri values at 30 kmlh
7 Tyre and rim coordination
Approved rim contours are given in
a) Table 10 for agricultural drive wheel tractor tyres;
b) Table 11 for agricultural steering wheel tractor tyres;
c) Table 12 for agricultural implement tyres with normal section height;
d) Table 13 for agricultural implement tyres with low section height.
8 Tubes
Whenever a tube is required, it should be identified by the same designation as the lyre size in which it is to be mounted.
b) Table 2 for tyres of diagonal oonstwction with low section height;
C) Table 3 for tyres of diagonal construction for special cultivation work;
d) Table 4 for tyres of radial construction for special cultivation work.
5.2 Agricultural steenng wheels — Tractor tyres
Tyre size designations. measurement rims, design dimensions of new tyres, and maximum tyre dimensions in service are given in
a) Table 5 for tyres of diagonal construction with normal section height;
b) Table 6 for tyres of diagonal construction with low section height.
5.3 Agricultural implement tyres
Tyre size designations. measurement rims, design dimensions of new tyres, ana maximum tyre aimensions in service are given In
a) Table 8 for tyres of diagonal construction with normal section height;
b) Table 9 for tyres of thagonal construction with low section height.
6 Radius index
Radius indices are parameters which are used exclusively for the calculation of forward ground speed during homologahon procedures (see for further Information ISO 3965).
Values are given in Table 7 for tyres of diagonal and radial constructions with normal section height and for agricultural tractor drive wheel tyres of diagonal construction with low section height.
They apply to tyres inflated to the recommended inflation pressures given In ISO 4251-2 and having a load per tyre corresponding to 50 % of the maximiri values at 30 kmlh
7 Tyre and rim coordination
Approved rim contours are given in
a) Table 10 for agricultural drive wheel tractor tyres;
b) Table 11 for agricultural steering wheel tractor tyres;
c) Table 12 for agricultural implement tyres with normal section height;
d) Table 13 for agricultural implement tyres with low section height.
8 Tubes
Whenever a tube is required, it should be identified by the same designation as the lyre size in which it is to be mounted.
