Tyre identification number Please refer to at the start of the chapter on page 186. Fig. 150 International tyre lettering Information for the end user concerning comparative values for specified basic tyres (standardised test procedure): → page 213 182.5C1.TRO.74 Wheels and tyres 193 → Fig. 150 Tyre lettering (example) Meaning Product name DOT JHCO CHWS 2213 JHCO CHWS 2213 4 TREADWEAR 280 Relative life expectancy for the tyre, with reference to a US- specific standard test. Tyres with the specification280 wear at a rate of 2.8 times more slowly than standard tyres that have a treadwear value of 100.
The performance of tyres is determined by how they are used and can significantly de- viate from standard values due to driving style, mainte- nance, road surface and climatic conditions.