I just replaced the OEM’s with another set. I like them, but this set is giving me the slightest squishy feeling in the handle bars on certain roads. I can’t pin it down. Not a balance thing, that’s smooth and always has been. They’ve been on about 1,500 miles. I had to add three pounds to each tire once. I carry 40/40. I don’t check them each ride, but I will in the next couple days before my 3,000 mile trip. It could be air, and if they’re down a tad, I’ll have to check more often and see if that’s it. I didn’t like E4’s when they were on my last bike. That got totaled before they were fully tested anyway.