Unusual tire wear is always an indication of one of two or three things (one is obvious)
1 If the wires are wearing either only in the center or everywhere but the center of hte tread... Like the upper and lower cases in the word trEad or tREAd
The problem is inflation under inflation wears the T and D over the E if
If it's one side or the other.. (Inner or outer edge) Alignment..
There are some other alignment wear patterns as well.
Sidewall wear.. Brushing up against the curb.
EXCEPTION oversize tires can rub on body parts.