Don't remember. Like everyone else is saying, doesn't hurt to give them a ring and ask directly.
Sidewalls are usually not covered but this is definitely a time to call and ask.
I agree with Andrew, you should call if you have a warranty & ask them if nails are are covered under that warranty.
I am not sure what is covered under a warranty if there is a warranty on the tires give them a call at the tire center that you went to
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