Perhaps you have some direct training that supersedes advice given in the owner's manual, but in the tire category of the manual:
I also own a C5 Corvette which has different sized front-rear tires and are directional as well. Those can not be easily rotated (left-right after remounting on rims only). I'm really good with not doing it, but I wonder if there is really any harm?
In my personal experience, by the time you notice any unusual wear there has been a significant tire life reduction.2005 XLR Owner's Manul said:
I also own a C5 Corvette which has different sized front-rear tires and are directional as well. Those can not be easily rotated (left-right after remounting on rims only). I'm really good with not doing it, but I wonder if there is really any harm?