Even into the "wear bars" there's plenty of meat (rubber) remaining in the tire center. The OEM Bridgestone is well constructed with approximately 3/4" inch thickness in the tire center when new. You, in all likelihood, had a few more thousand miles of safe riding.
A picture paints a thousand words! That's why I dissected my OEM Stone and documented what remained of the tire after 16.5 K miles of wear. No guessing, just the facts
Here's my original Thread on the topic
http://hondaf6b.com/showthread.php?2...t-Tire-Autopsy