I've seen numerous posts and discussions in the past year about the vibration that is common on the DeLorean at around 60-70mph. This is also a problem on other sports cars, and on one of the other lists that I monitor, I saw this web address: http://www.gsp9700.com/ This is a site that Hunter Engineering put up for their high end balancing machine. Not only does it check tire balance, but it can check tire and rim lateral and radial runout, tire uniformity (hard places in the sidewall that don't flex like the rest of the tire), and improper bead seating. In other words, most of the problems that can cause vibrations. The person who posted the link on the other list swore that it solved his vibration problem completely. There is a locator to find a shop near you that has one of these. I'm going to try it in a few weeks when my budget gets better and will post the results. If anyone tries it before that, please post and let us know! Mark N VIN 6820