Two problems related to tire bubble have been reported for the 1997 Ford F-150. The most recently reported issues are listed below.
Subject tire started to show raised portions and uneven wear of tread. Then recently the raised bubbles eroded and now showing steel cord. ( dot number: w208 tire size: p23570r16 ).
There are bubbles in the tires that were sold with vehicle. Owner has replaced the tires. Manufacturer has been notified.