When you increase the rim size, you get a lower profile tire so that the overall outside diameter doesn't change. (mechanics.stackexchange.com)
The first row of images pictured on the left side of the graphic, shows the 1.662 carat, photographed side - by - side a 1.15 carat, Brian Gavin Signature Round, which has an average outside diameter of 6.72 mm. (briangavindiamonds.com)
Next, he can go to the hardware store and buy 42 washers with a 1 - inch diameter hole and a 2.5 - inch outside diameter (being careful not to select any «oddball» washers that are overly thick or thin). (fitnessblackandwhite.com)