Been meaning to write this post but kept forgetting. I forgot to install the hubcentric rings when I put my wheels on and holy crap...talk about massive steering wheel shake once you hit 65-70 mph. I didnt think it would be that bad but it's no fun. The wheels and tires were road force balanced so I know it's not that. It's been cold the last few days so once it warms up again in a couple of days, I plan to rip the wheels off and put the rings in. So yeah...if your wheels need them so they sit properly on the hub...USE THEM! Steering wheel shake is no fun!