Hi Mike, I had stepped wheels made by ROH Australia, - organized by a Bridgestone outlet. They are a true three piece wheel, with a 14' centre ( fc/hr stud pattern), and a stepped 15' alloy rim. I believe they are a "simmons" copy. They ran a 55 profile tyre, which was also calculated by the tyre dealer, in order to keep the rolling diameter of a 14' tyre, and thus keep the speedo smewhere near accurate! The details of the wheel specs. are available-stamped on the labels on the inner rim. I have photos and details, if you would like to call me on 0416039477 ( Graham ) - ex fe/fc sa club member.