C-F means centre to flange. I have only given one measurement because track hubs don't need to be dished to one side. I don't know if the hubs that I had before are the same ones that you are using. Do you already have them? Then you can measure them yourself. More accurate with a vernier caliper, but a decent ruler will do. The ERD makes a bigger difference to the final calculation and the number of holes.
C-F means centre to flange. I have only given one measurement because track hubs don't need to be dished to one side. I don't know if the hubs that I had before are the same ones that you are using. Do you already have them? Then you can measure them yourself. More accurate with a vernier caliper, but a decent ruler will do. The ERD makes a bigger difference to the final calculation and the number of holes.