225/50/15 means that the tire is 225 millimeters wide and the side wall height is 50% of the width. Of course the 15 means a 15" wheel. The stock size was 235/60/15 so the 225/50 is 10 millimeters narrower ( a little less than 1/2" )and the side wall is a little lower, 50% of 225 millimeters vs. 60% of 235 millimeters. That would result in a slightly smaller diameter tire which would lower the final drive ratio a bit; not a bad thing as the DeLorean is geared pretty high and the lower final drive will make the car feel a slight bit quicker. Since you're going from a 255 tire the difference would be even more noticable. Fuel mileage will suffer slightly but not enough to be a problem. I don't think handling would be affected dramaticaly either. I've thought about the AVS ES100's too and I can't imagine 10 millimeters narrower will be a problem. That only interperets to about 1/4" narrower on the each side of the wheel. Bruce Benson >I would like to get something with a wild tread pattern like the > Yokohama AVS ES100. They make the front tire in this size >but the rear > choices are 215/60/R15 or 225/50/R15 Are these sizes to far >off of the > > stock 235/60/R15 ?? The old tires I took off where >255/60/R15 and > they > looked great on the back.....