Dunlop SP9000 tread 'tears'.
I was looking at my SP9000's today and they have tearing through the outer tread pattern. These seem to go quite deep into the tread - its almost as if cut by a knife - but is every 5 to 10 mm (or less) right around the whole tyre. This has only happened in the last month. At 9oookm they were fine, now at 9600km they have these lil 'cuts'. Is this common? Recently had a constant high speed run of 150 - 200kmh over 20 minutes, but these tyres are speed rated much higher than this. Tyre pressures always check and adjusted. Dunlop agent in NZ (Beaurepaires) has looked at them and doesn't know why they are doing it. Suggested a tech rep look at them.
Another tyre shop suggested heat fractures. Any suggestions?
AUIII XR8, Manual. Herrod Motorsport bits