All, while at Thunderhill this past weekend, one RR delaminated around the circumference of the tire on the inside edge of the left front tire. The tire was showing steel belts on a good portion of the tire and where there was any rubber left, it was showing a band about 1" or so that was missing most of the tread rubber.

The tires had not been inspected for several sessions prior to the problem appearing while on track so I have no idea when it occurred. The other three tires were all fine and there was no splitting on any of them and no indication of any other delamination issues. The tires were re-examined after several more sessions and just before the Sunday race and all looked great with no issues visible.

Sorry, I do not have the date code on them but believe they are week 32 tires.

Jim