I can't believe I am asking this...

I bought an '01 530i sport with only 16K. The tires are original, and the rear are worn half as much as the front which look new.

The tires are directional so I have to go front to back/back to front but can't cross sides..

My question is ... typically you put the tires with the best traction on the rear wheels. The dealer didn't rotate them and it was off lease, so I'm sure they weren't rotated before I bought it.

Should the best tires go on the back or on the front? The rear ones sure look like the used to be on the front as the edges are rounded (like from cornering) - just want to be sure with this ...they're expensive tires and I'd like to make them last as long as I can.

Thanks, and pardon my ignorance.