Mate I'm out in the city, I replied to your SMS I still have them, they are almost brand new. They are a different tread pattern, they look low on tread but they are fashioned mire like slicks, the centre of the tyres don't have tread. You can tell by the outer tread, both sides aren't even worn.
I'm on my iPhone ATM and I can't attach pics but if you go to The Nitto website you can check out the centre tread markers.