Thanks CapriRacer.
This vehicle is in United Arab Emirates. Tyre is 2 years/ approx.40000 km old. Already replaced as there was excessive inner shoulder wear and the dealer advised to replace it. Happened to see this mark on the old tyre. Got curious as I never noticed similar marks on tyres...
Please see the picture. Front tyre of an SUV. A little above 40000 km. What could have caused this? Asked some tyre people nearby. Yet to get a clear answer. Thought of posting here. http://files.engineering.com/getfile.aspx?folder=8e4332f1-d6d0-40de-8072-9af294337b7b&file=Tyre.jpg