JimK-NY wrote:
As already mentioned, this sort of abnormal wear indicates an issue with alignment or a similar issue.
Don't feel bad about skipping the tire rotations. Rotations would only disguise the issue. You now know something is wrong and needs to be fixed. I feel this way about tire rotations in general. I have not done tire rotations on my cars in decades. The only issue I have had is tires wearing differently front to back. No problem. I just replace the front or back set as needed. On my truck camper the rear tires wear at twice the rate of the front tires. At about 15-20K miles, I switch out the front and rear tires. After another 15-20K I replace the rear set with new tires. Following this schedule I always have relatively new, minimally worn tires on the rear axle.
That’s great if you’re good with never correcting the tread feathering, although you are rotating them if you go back to front. You’re putting smooth tires up front every 15-20k.