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ISO 4209-1:2001
Truck and bus tyres and rims (metric series) - Part 1: Tyres
This part of ISO 4209 specifies the designation, dimensions and load ratings of the metric series of tyres primarily intended for trucks and buses.
It is applicable to bias-belted, diagonal and radial tyres for trucks and buses, mounted on 5° tapered rims and on 15° tapered (drop-centre) rims.
It is also applicable to different concepts and types of tyres and rims; in these cases, however, appropriate rim/section ratios K1, K4, coefficients K2, K3, CR and construction codes have been added to Tables 3, 4 and 5.
ISO 4209-2 deals with requirements for rims.
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International Organization for Standardization [iso]