Tire size tolorances?

[Tbird232ci]

I've got a set of wagon wheels to put on my T/A, but other than money, the biggest hold up is what size to run. The Vette size is 275/40/18 where as the size to match the outside diameter of the F-body is 275/35/18. The Vette size will look better, but the F-body size will keep me from having issues.

The biggest reason I've been debating this is I've read that that much of difference will cause me to have ABS issues. Is there any truth to this? The speedometer doesn't bother me too much.

Now, I know I can have it tuned to correct the speedometer and whatnot, but I just had a Trifecta tune, and really don't want to shell out the money just yet to have it re-tuned unless there is a cheap alternative.

[tomsws6]

i believe you can just have the speedo calibrated with out doing the whole tune. i think. someone chime in.