Had my new Dunlop E4 front put on today. Checked my records and found that I got exactly 19,775 miles out of the old one. I could have pushed it beyond the 20K mark but why chance it. Rubber is easier than skin to replace. Thx to Dunlop for building a great tire. I did the math three times on my phone calculator to make sure. I was also running Ride On balancer / sealant and it was just like their videos show.