John Kilopascal wrote in USMA 22904:
These new tire sizes don't seem to include the diameter of the wheel on which they are to be mounted. I think that is a rather important dimension.2002-10-23I wonder if this change, is just a change in numbers, or will there actually be a change in size to rational metric? Presently, Tire sizes are 14 in, 15 in, 16 in and 17 in. This corresponds to 355.6 mm, 381 mm, 406.4 mm and 431.8 mm. If they were to go to a rational metric series, what would be the optimum? 360 mm, 380 mm, 400 mm, 420 mm & 440 mm, 5 sizes using 20 mm increments? 355 mm, 380 mm, 405 mm, & 430 mm, 4 sizes, using 25 mm increments. Or would a we expect to find a soft conversion of 356 mm, 381 mm, 406 mm and 432 mm? John
Joseph B. Reid
17 Glebe Road West
Toronto M5P 1C8 Telephone 416-486-6071
