It doesn't. For FRC use most 35 is fine C-C with no tensioning system. As long as your chain runs aren't longer than 17" or so you're set for the season.

Asid, I'd stray away from making assumptions like that that you're not completely sure of. Misleading information like that is dangerous. I believe Anant usually made a point about misleading information to students each year. I remember he told me directly when I spoke to him at your workshops a few years back.