I have been running 40 lbs in the rear tire. I changed it to 38 lbs to hopefully force a different wear area on the tire. I used to get 24 to 26,000 miles on the E2. I am still running the original 404 on the front with 19,000 miles, it is starting to cup. It will be gone by the end of summer. Was hoping to put a E3 on the front but maybe not.