It has an eccentric BB but I wasn't quite happy with the chain tension, and didn't have a half link handy, so saw it as a good excuse to use a floating chainring. That sync chain has now stretched a tiny bit (<0.5%) so a whole link could be removed and the eccentric BB would suffice alone.
nice bike, altho not our size. out of curiosity, is the tensioning chainring just for style, or does it not have an eccentric bb?