If the wear was on the rhs of the tyre as it sits on the bike it could be the the result of...
Road camber
Round abouts
A day at the track
You favour rh turns/ corners over the other
It's
never camber. There are good articles on the 'net to prove this.
It can't be roundabouts because there aren't enough of them.
Closed circuit tracks usually favour RH turns, but you'd have to do all your riding on them.
Leaning more to the right might contribute.
The real answer is [
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It's the RH side for countries that drive on the left and vice versa because [
another drum roll]
It's a greater distance around RH turns than LH turns, therefore the bike is leaned right longer than left.
Savvy?