I believe the F-35B has been experiencing high wear rates on the tyres/tires. The B has a different tire maker than the A and C models. Perhaps a design or manufacturing issue. I wonder if heat from V/STOL operations and the rough non-skid on deck contributes to the high wear rates.
Good article here:
http://defensetech.org/2013/09/19/5t...eration-tires/