I now have 2000 miles on my 2nd set of E4's. I had 6800 miles on them when I got a large bolt in my rear one. I replaced them with like kind. I do notice that these tires are very noisy off of center. They also seem to have a vibration whenever I get off center to turn one way or the other. I liked my original Bridgestones and got 13,500 miles out of the original set but was having a problem with the 40mph wobble and accelerated tire wear with the 2nd set of Bridgestones so my dealer said he wanted to replace them with a set of E4's under my tire warranty so I said go for it. I also had the neck bearings changed out for the AllBalz tapered bearings. The 40mph wobble is gone but I am really annoyed by the noise and vibration of the E4's and will probably go back to the stock Bridgestones when I wear through these E4's. BTW, those new tapered bearings completely changed the handling of the F6B. Steering is much tighter and precise.