Quote:
Originally Posted by Dallaz
What's the advantage of 2 piece?
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2-piece rotors allow for expansion and contraction of the iron ring (braking surface) without actually stressing the entire rotor. The hat is separate from the rotor-ring and bolted together with elongated holes to allow for the thermal expansion.
Sorry was already covered earlier... missed that big a$$ post above.
Although that being said, i warped the crap out of my Stoptech 2-piece rotors and had serious pad taper issues. I believe that was me just trying not to replace what amounted to another $500 for front rotors *cough.