Someone created this spreadsheet for the BOSS and I updated it with the two tire sizes for the 350's. The Ford engineer I spent a lot of time talking to told me that the lower ratio of the shorter R tires was part of the performance improvement. No surprise as the shorter and lighter wheel setup I ran on my BOSS was a noticeable improvement over my street tires/wheels. Anyone up for a 280 MPH top speed run? : @cloud9 @Black Boss @Moto @fuhrius Click on the image to enlarge it.