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  • Admin

i need help......i am ordering brake pads for my 2005 cayenne s and i'm not sure of the rotor size. i have 19"wheels. does that mean i have 380mm or 350mm?

thanks anyone!

PM me your VIN and I'll check - please also specify front or rear -- or both.

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  • 7 months later...
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Sorry, I just can't take it anymore...I keep reading about 17" brake rotors on Cayenne forums, and feel the need to point out that there are in fact 25.4 mm in every 1.0 inch. Therefore:

380mm = 14.960"

350mm = 13.780"

300mm = 11.811"

As much as I'd love to have 17" brake rotors on my Cayenne, it just ain't so...

BTW, I believe the silver and red calipers between the S and Turbo are the same, just different paint color. Black calipers on the Cayenne V6 are smaller.

I also believe the 380mm brakes are only found on the Turbo S models, and on Turbos with the (very expensive) Powerkit option, which basically turn a regular Turbo into a Turbo S by changing intake mainfold, ECU, brakes, and etc.

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  • Admin

In Porsche's parts list they refer to 17", 18", and 19" front rotors and 17" and 18" rear rotors.

I think they are including the caliper in their measurement as this is important when fitting wheels of differing sizes.

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Loren, I bet you're correct on that reasoning. Wheel fitment over big brakes it critical, and those numbers indicating minimum wheel size would make it easier to discern.

And still, 380mm is a huge brake rotor...the same diameter of the wheels on my VW Eurovan!

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