Jerry/MD, I think tire mileage has a lot to do with where you ride. My friend has a 2001 Heritage and regularly gets 15k out of the rear. He rides about 70 miles per day on the freeway to work and back, and sometimes we cruise thru the Santa Monica mountains. My first bike, 1995 Heritage which I now ride locally only, will barely get 10k from the rear, but always 20K from the front. I ride a combo of mountain roads and freeway. This also has an effect on brake pads. I crank it on when I get on the freeway and I don't drop gears when coming to a light on surface streets. Sometimes I ride it easy and sometimes I ride it hard. On my 09SEUC I hate to admit I only have 9k miles on it and both tires still look really good, but If I get 15K out of the rear and 20K out of the front I will be happy. I check the tire pressures at least twice a month on both bikes, and if they are off it is usually by only a pound or two. I have never met anyone who got 20K out of a rear tire on a Big Twin, but of course I believe what the guys on the site have posted. One of the guys on the site who is local to me just switched to Dunlop American Elite (not Elite 3 ) I will be checking in with him after a while to see what kind of tire mileage he is getting. JMHO. CAHDBIKER