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Old 01-16-2008, 05:47 PM   #1
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Join Date: Dec 2005
Location: South Riding, VA
Posts: 322
Hey Randall,
The Porsche Workshop Manual says:
Brake disc diameter-
Front: 298mm
Rear: 292 mm

But then they add...
Effective brake disc diameter:
Front: 250mm
Rear: 240.6mm

Brake drum diameter is 164mm.

Get out your measuring tape.

mike
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Old 01-16-2008, 06:47 PM   #2
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Derb, one set of disks looks like it's a 1/4 inch larger in diameter than the others, so those must be the fronts.

The same slightly larger set are also wider by 1/8 of an inch. The cooling fins or support between the discs (front and back) are also a different design.

Since I haven't taken the old ones off to compare diameters and widths, I'm going to assume they are correct.

I'll get my mm ruler out tomorrow and check them. Thanks for the numbers!
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