I'm not too sure if this is a cobra forum or contour forum, BUT,
to corroborate the source, I just measured my 13 Track Baer's and they're 1.1inches up front no questions asked.
So are the 13 cobra ones that wide as well, I understand that the 12inchers are .81. . .
I'd stick with the 1.1 just because surface area wise it's more of a heat sink than the .81. . .0.3 inches makes a difference, especially since it's 0.3 wide and 1 inch diameter difference between the two rotors. . .my .02
