Quote:
	
	
		
			
				
					Originally Posted by  renny
					 
				 
				Z-rated tyres (mentioned in the article) are not suitable for winter, once temps drop below 5 degrees celsius those tyres turn rock hard and you have no traction at all. It's like a hockey puck on ice. 
			
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Z-rated tires don't exist anymore.
They used to mean the tires were tested over ~240km/h.
Now the rating system goes much higher (300km/h).
You can get V-rated winter tires (tested to 240 km/h).
/tiredorking