New Holland T4.75F Operator's Manual page 141

Tire marking
To indicate, dimensions, structure and specifications
of use of a tire, the manufacturers have internationally
adopted standard abbreviations and numbers. The draw-
ing shows an example of the marking on a tire used for
agricultural work. Example of reading the abbreviation
600/65 R 38.
1 157 154 Load capacity index.
2
A8 B Speed code. Maximum speed in relation to load corresponding to load index (IC) see page
3 TUBE- Tubeless tires. Tires with inner tubes are marked TUBE TYPE or left blank.
LESS
4 The arrow shows the direction of tire travel.
5 600 Nominal cross-section width in mm.
6 65 Ratio between height and width of cross-section.
7 R Indicates the radial structure. On a conventional tire, the R is replaced by a hyphen (-).
8 38 Rim keying diameter.
Another example: 7.50-16 8 PR
1 7.50 Nominal width of cross-section in inches.
-
2 Conventional structure.
3 Rim keying diameter.
16
4 Resistance index of tire or number of ply that make up the tire. (This code is normally shown on
8 PR
conventional tires, whereas radial tires show the load capacity index).
6 - WORKING OPERATIONS
6-43
1
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