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Old 07-20-2007, 06:07 AM
Wagner's Avatar
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18" wheels to 19" wheels

On my 545 I'm debating changing from the OEM 18" setup to another 19" setup but I want to maintain ride height/wheel gap ect..

Current configuration:

245/40/18 F
275/35/18 R

Now for the 19" wheels what tires would I use? I'm guessing:

245/35/19 F
275/30/19 R
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  #2  
Old 07-20-2007, 07:59 AM
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BigR,
Not the tar xpert, but using the tire size calc., your "front" idea is right on and nearly identical, before and after.
Your rear "after idea" comes up nearly an inch less dia., 1/2 inch less radius and nearly 3" less circum.
You need a bigger tar on the rear.

I realize tire effective "sizes", vary by brand/species etc., but for a quick look, use this handy comparo link:
http://www.powerdog.com/tiresize.cgi
GL,mD
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Old 07-21-2007, 07:35 AM
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I did the math on it too and thought the back looked shy, however, both TireRack and a few other web sellers claim that those are the correct sizes.
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