I wrote a negative review of this product in 08/2011. I will give Wing Stuff credit for reviewing my post and having Centramatic contact me. The Centramatic rep suggested that I may have had a bad tire (1st in 40 years), and that I should put them back on with the new tires. I waited until my next tire change with a completely different brand, I got the same result (moderate to severe vibration at 75 mph and above), but left them on mostly due to laziness. Last month I changed out my steering head bearings and replaced the front springs, still had the same vibration pattern. Decided to take them off after two rides, static balanced both wheels, it's as smooth as glass at over 100 mph (same tires). So Centramatic, if your offer reimburse me is still good, I'd love to send this scarp metal back to you.