Quote:
Originally Posted by Z/28Dan
I'm assuming these are 1LE rotors?
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These are GIRODISC Rotors (hubs were CERAKOTE Satin Black) which are the SAME diameter as the ZL1 1LE OR ZL1 rotor which are 390MM or 15.35 inches in diameter. The SS 1LE rotor is SMALLER in diameter than the ZL1 or ZL1 1LE rotor is.
Part of the WEIGHT Savings on THESE Girodisc Rotors compared to ZL1 Zl1 1LE rotors is the fact that the rotor HUB is BIGGER and made out of lighter material when compared to the stock ZL1 rotors. That's ALSO why you run SS 1LE size brake pads when you use this girodisc rotor because the WIDTH of the rotor pad contact area is narrower to compensate for the fact that the GIRODISC rotor HAT is BIGGER. THAT way they keep the same 15.35 inch overall diameter (390MM) as the stock ZL1 set up.
As I said EACH GIRODISC rotor is 4.8 pounds LIGHTER than a ZL1 rotor. That's almost a 10 pound savings in rotational mass.