Both of the Diameter variance according to the Tire size cal if I did it right
. Both are under 3% which is better so as to not to mess with the ride ability. Positive or Negative. If anyone can chime in.
265/35R 19 285/30R 19 shows a -2.17% Diameter Variance.
265/35R 19 285/30R 19 shows a +2.10% Diameter Variance.