RWM wrote: "Thanks. I can easily understand the issue of a mismatched size
within the four rolling tires, though even there, the simple action of
differential wheel speed on inside and outside tires of the same size,
rounding a corner results in a small difference, but a different size all
the way around would not trigger the sort of speed sensor differential that
triggers the ABS or TCS functions.
Especially since, as far as I recall, this platform has been delivered with
a variety of wheels diameters, widths and tire sizes/profiles."
In simple terms, ABS uses the wheel sensors which determine speed to
determine when ABS is needed and when to release it. Number of rotations
will be higher or lower then depending on whether you increase or decrease
OEM tire sizes.