Quote:
Originally Posted by 55Designs
What really blows is the rear rotors are larger than the fronts, why the hell is that?
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Fronts: 355.4mm OD, 31.9mm thick (30.0mm min. thickness)
Rears: 365.0mm OD, 28.0mm thick (26.0mm min. thickness)
The rears are larger in OD due to the larger than normal parking brake drum (and the fact the CTS-V rotors were used as is!). It is definitely heavier than it needs to be. The fronts are a bit thicker as they run hotter.
Of course, the rear caliper piston area is a lot less to balance the larger effective radius. There are many vehicles using this sort of setup, but most are trucks and SUV's.
Chris