O.K. I'm at the point where I will be needing some new tires on my MS3. I've done all the thread searching on sizing that people have tried. I don't want to run a 225-40 on my stock 7" rim. I do autox occasionally and live in sunny California so going with my usual summer high performance tire. I've seen some having issues with minor rubbing in the rear with a 225-45. My choices are pretty limited with the stock 215-45's. I don't want to spend over $200. per tire so I'll go with Dunlop Direzza star spec Z1 or Kumho Ecsta XS. Both are available in the 225-45 and in the $180. range. I can also get the Falken RT-615 ($166.) in that size but it's still a decent tire but a little outdated now with the other choices out there. I've looked at the specs for these tires and there are small differences in diameter/tread width/sect.width but, overall pretty close to each other. Any input from those who are actually running the 225-45 on a stock speed 3 wheel would be appreciated... On a side note I hardly ever have passengers in my car.