I had to change my tyres due to inside edge wear like yours, long before the top bearing failure. This was a tracking problem possibly caused by the many speed bumps which I have to negotiate (slowly ) on a daily basis. Since tracking was adjusted, new tyres have worn evenly on the front.
You'll know when top bearings go by the "clunking" sound, but see above posts for more detail.
You'll know when top bearings go by the "clunking" sound, but see above posts for more detail.