[patssle]

Here was Michelin's response

We're sorry to hear your Pilot Super Sport tire was punctured.



A nail or screw (etc) puncture can damage the inner liner due the tire flexing as it rolls.



Your tire is a prime example as to why a tire that has been punctured should be removed from the rim for an internal inspection. Internal damage is not detectable from the exterior.



Acceptable tread puncture repair limits for passenger and light truck tires are:

- 1/4" diameter or less per RMA (Rubber Manufacturer's Association) procedure
- Maximum 3 repairs to an individual tire, except run flat tires only 1 repair permitted
- Each repair location minimum of 90 degrees apart
- No additional repair can be made if first or second repair is not an approved RMA repair type. If non-RMA type, tire must be scrapped.