Quote:
Originally Posted by DaveDee
The 1% referred to is the max allowed difference between the rear wheel and front wheel rolling diameter.
Agreed OE options are 225/40 front 255/35 rear or optional 245/35/19 wheels front 255/35/19 rear.
I used an online calculator to get the max tyre diameters that could be used with X Drive limitations and had less that a 1% rolling diameter difference between front and rear wheels
Largest usable combination that would fit the car were 285/30/19 rear and 245/35/19 front
Attached is a screenshot of the calculator result showing .4% difference between front wheels and rear wheels, also for reference the same calculator results for the OE 255/35 rear 225/40 front
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Thanks for the clarification.
Looks like the website I was using has a 1mm difference in diameter compared to the website you're using, but should be close enough that the transmission won't know the difference.
According to Tire Rack, and in regards to the ZTK package, an 8.5" wheel can handle a 255, while a 9.5" wheel can handle a 285. This means a 255/40 front and a 285/35 rear will give you a -0.4% difference, which should be a nice meaty look if that's your thing (which it is for me).
*Ignore the wheel width's and offset's in the screen shots below. I was only interested in tire width and diameter.