Hubcentric rings question
 

The svx hubs are 56.1mm, my rims have a bore diameter of 66.6mm. What size ring should I use? 56.2mm X 66.5mm? Do they make them in tenth of a mm increments or can I round them out?

I think you can only get them in 72 and 67mm size, so go with the 67.
-Bill