For those that have Katzkins did you install them yourselves? When i go to their site there is no option to just buy them as they only appear to deliver them to a registered fitter
How about the rolling diameter as it is 4.2% different from stock and the recommendation is less than 3% change. Dose it effect your speedo calibration?
Isn’t the challenge the change in rolling diameter?
The stock size (295/40R19) = 28.3”
305/35R35 = 27.4” (-3.2%)
325/30R19 = 26.7” (-5.7%)
The recommendation is to stay within 3% change. More than Paul may be able to chime in