Originally Posted by colindate
Just an update: I installed a set of the 19" Foundry Wheels shod with 255/40 Eagles on my 2013 V6 Convertible last week. The car rides great! Handles like it's glued to the road, and looks awesome. No cowl shake whatsoever.
post some pics
the speedo doesn't need to be re-calibrated when changing tires. even big differences should not change the diameter size by more than one inch.
which means a speedo error of 1/27 = 3.7%. and that's with a big change.