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914World.com _ 914World Garage _ Minimum Front Rotor Thickness

Posted by: vesnyder Nov 22 2005, 01:55 PM

I want to machine the braking surface on my current rotors and they measure out to 0.375 inches. What is the minimum thickness and can I have these done once more?

Posted by: maf914 Nov 22 2005, 02:32 PM

Are you talking front or rear?

Per the Haynes manual:

Front disks: New 0.433", Minimum 0.394"

Rear disks: New 0.0.374", Minimum 0.35"

Posted by: porsche914blue Nov 22 2005, 03:46 PM

I just replaced both front rotors on my 74 with new Zimmermans.

Old and new rotors were stamped with 8.5mm minimum (= 0.335 inches).

See if your rotors are stamped with a minimum thickness.