Well after much thought and research thanks to many of you, I've decided to go with the Contis in 255/40/19s front and 295/35/19s rear. I have the stock 2013 sport rims still, so these sizes are better suited for my rim width of 19x9 f and 19x10 r. This setup will stay well within 3% of each other at +0.4% also.
According to this site
www.tiresize.com/calculator my speedo would be pretty accurate in these specs.
RESULTS:
Speedo Reading / Actual Speed
20mph / Actual Speed 20.1
30mph / Actual Speed 30.1
40mph / Actual Speed 40.1
50mph / Actual Speed 50.2
60mph / Actual Speed 60.2
70mph / Actual Speed 70.3
80mph / Actual Speed 80.3
90mph / Actual Speed 90.3
Thoughts? Does everything look right?
Your feedback has been invaluable gents.
