Originally Posted by
cg1985
Ok, this might sound like a basic, and silly question. But since most chain rings are perfectly round, and concentric, are these photo's taken at their tightest, or loosest spot?
I would think the loosest, but I just want to make it clear.
I think that most chainrings are pretty round but concentric is something else.
I can't remember ever working on a single speed bike in which the chain didn't have a tight and a loose spot. I try to adjust the chain tension so that at the tightest spot the crank doesn't have any bind.
Once you get the chain tension pretty close, there's a trick for getting the chainring more nearly concentric. Then you can fuss with the chain tension again.