I changed my rear last fall......got 12,000+ out of it and just changed my front.....at 13,869......I've consistently ran 41 PSI front and rear.......I could have gotten another 1,000 out of the front, but I'm leaving on a 4000+ mile trip and I didn't want to have tire issues. Others have gotten less and others have gotten more!

Hope that helps
Ride Safe but Often!!