Goodyear tire pre-mature blowouts/tread seperation

From the Goodyear http://www.goodyearrvtires.com/pdfs/tire-care-guide.pdf
Goodyear Warranty:
G614 RST®- The new tire coverage of this warranty ends when the treadwear indicators become visible or four (4)
years from the date of purchase, whichever occurs first. Without proof of purchase, date of manufacture will be used
to determine eligibility.

Wrangler® SilentArmor®, Marathon®-The new tire coverage of this warranty ends when the treadwear
indicators become visible or six (6) years from the date of purchase, whichever occurs first. Without proof of purchase,
date of manufacture will be used to determine eligibility.