Not below 4mm on winter tyres, advises Conti
Manufacturers and tyre safety organisations generally recommend replacing tyres when tread depth reaches 4mm; with winter tyres, the role tread plays is even more pronounced. In an official release, Continental quotes the advice of one Ruprecht Müller, an expert at the technical centre run by the German motoring organisation ADAC: “The tread pattern makes a crucial difference, especially on snow and slush,” stated Müller. “A winter tyre loses much of its traction on snow in particular when the residual tread depth drops below four millimetres or so. It makes good sense to replace the tyres at this tread depth at the very latest.
“Winter tyres are likely to age faster than they wear if they are not used much in winter,” Müller added, advising that “tyres should not be allowed to get any older than six, seven years.”
Continental says its winter tyre production is “going ahead at full steam.” Klaus Engelhart, who is in charge of press and public relations for passenger and light truck tyres at the tyre maker, added that “in the case of winter tyres, we expect this year’s demand to equal last year’s.” In 2010, delivered 27 million winter tyres to dealers in its home market alone.