The Mach 1 is now dressed out in what is arguably the most popular Ford rim available: the Magnum 500. These particular Mags are from Specialty Wheels and are mounted with the P235/60R15 tire. This tire is a close replacement for the size that Ford originally used on this rim, the F60-15. Also note, plus-sizing has reduced the tire sidewall but kept the approximate 26-inch diameter. This tire also gives better handling due to its lower sidewall profile. Unfortunately, ridewhen compared to the 70-series tirewill suffer.