This is for the new Shimano 12sp that requires a special tooth profile.
Went a little too ambitious here. First big New Mexico climb told me a 32T was out of my league. Perfect for you quadzillas, though.
Has, literally, 4 rides on it.
$45

Click image for larger version. 

Name:	IMG_1364.jpg 
Views:	26 
Size:	959.4 KB 
ID:	333112

Click image for larger version. 

Name:	IMG_1362.jpg 
Views:	25 
Size:	734.9 KB 
ID:	333113