Changing tires on wheels vs new set - Page 2 - 6SpeedOnline - Porsche Forum and Luxury Car Resource

#16

07-30-2015, 07:55 PM

mhollack

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Join Date: Jun 2015

Location: Monroe, WA

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Quote:

Originally Posted by akbjr

If I have a GTS with center locks, how do I calculate what size 19 inch wheel and tire will fit without affecting the speedometer? also will any 19 inch center lock fit on this car and where do I find 19 inch center locks?

thanks

Im not sure of the oem offsets for the 20" center lock wheels for your GTS but I believe the rest of the specs are as follows...

Front 9x20 245/35
Rear 11.5x20 305/30

As a general guide you would just add 5 to the middle number (aspect ratio) for every 1 inch of wheel size change. For wheels, you just get the same widths and offsets. So it would look something like this...

Front 9x19 245/40
Rear 11.5x19 305/35

Last edited by mhollack; 07-30-2015 at 08:01 PM.

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