2011 Accord - running OEM Yokohamas E70D's (Decibel). Just picked up that both rear tyres have intertread cracking. (Fine cracks running around tyre circumferance, located at base of tread pattern). Date stamp suggests they were manufactured in 2010 and have covered about 30K with about 4mm of tread left. Not readily apparent unless you jack the car up and carefully inspect the tyre tread in good light. In for new tyres pronto ! I have never experienced intertread cracking on my car tyres before. If you are running Yokos - perhaps worthy of a close inspection, just in case.