I am running a Paul High Flange Hub paired with a SRAM Omnium on an IRO Mark V. The chain is rubbing very slightly onto the adjacent spokes when riding on the fixed side. Enough to create a noise. The cog appears to be true. How do I remedy this? Try on a different 1/2x1/4" chain and see if it is slightly thinner? Are there any spacers I can use to edge it out?
Thank you for you help.