The 255/30/22 was not made specifically for these cars, they were out long before the 300C was. They are more practical for the newer model Impalas, Crown Vics, Bubble Caprices, Etc. And if you do decide to use this tire, try not to pay more than $335 for it. The 255/30/22 is .6" shorter than the factory tire and I would only recommend it if you planned on bagging the car. The 265/35/22 is almost .7" taller than factory, it still fits just fine and will offer the best ride quality and look the best. TIS wheels do not make a 22" in 5/4.5/114.3 all those who have them had them custom made by TIS (which by the way won't happen unless you are famous or have tons of money, we are a TIS dealer and they would not do them for us) or you must take them and have them drilled yourself, which is what we did. All the DUB magazines show the tire size used to be a 285/35/22 which is a typo, all the Dub cars are using the 265/35/22 with exception to 1 of the 8 cars which is using a 255/30/22.