|

| 
Front FMC/MCC rotor & hub ass. | 
| 
|

Rear Transit/MCC rotor & hub ass. | 
| 
I'm guessing on a 6 1/8" bolt circle. | 
This is an image of a ghost that flew past me while I was taking these pics. Otta' get me a new camera as this image does little justice to what I actually saw! |

About dead-on @ 11 1/2" | 
Approx. 7/8" thick | 
My take on this is: FMC 5108601-C (or G?) | 
FMC-TRANSIT (MCC-BARTH) CALIPER MOUNT BRACKET. |
|