I bought a set of lightweight sacchi rims for my dart. After installing them I began to notice vibration when exceeding 75mph. After one of the dealership mechanics asked me why I didn't have these and explained how they help smooth the ride I looked up hub size at dodge website. I then looked up hub bore on my sacchi wheels from when I ordered them. I ordered these and installed them myself. If you can change a tire you can install these. As for performance end, I not exceeded 100mph yet but the vibration is gone. Installation is as simple as, remove tire, slide ring on so tapered (thinner side) is towards you, install tire. Complete on all four tires. I won't drive a vehicle with after market rims that doesn't have some form of these. My only concern is how long will they last with phoenix weather prior to needing replacement. If I update this post that means they are being replaced or I no longer have car.