My Schwalbe Marathons lasted about 6500 miles on the rear, the front is still going at 7000 miles and look to have significantly more miles yet in them.

My Bontrager Racelite Hardcase looks like it MIGHT have lasted for an extremely long time, but the center ridge of cemented-on rubber came off. This may have been a manufacturing defect, the 2nd tire is still rolling, I've used it as a backup tire for years and I don't even know how many miles are on it.