Isn't one other issue the fact that speedometers are not accurate from the f... enough of that!
What about resale and inaccurate speedometer readings? Is this an issue with a dealer or a private party? Does it need to be disclosed upon selling an altered vehicle?
I don't see a dealer saying "how long have you had your tires... really, well I think your warranty is up due to the 8.8% error factor due to the larger tire diameter.." but I guess it's possible.