Is the speedometer program from the factory different for each tire size? Or do the 14" cars have a different setting in their ECU compared to 15" compared to 16"? Would a 98.5 SVT have a different setting compared to a 99 SVT? (Yes they're very close, but not exactly the same diameter.)

I'm trying to get a feel for how customized the speedo program is.

Brian Dors
99 SVT