Originally Posted by
fietsbob
"Corn cob" clusters, increases by just 1 tooth at a time..
race bike stuff .. 11 to 23?
11-23t = (11,12,13,14,15,16,17,19,21,23) ICS670010123.
Yeah, but if you work out the actual gear inches for each ratio you'll find that the jump when you shift from the 11 to the 12 is still pretty big.
Actually, it's possible to make an 11 1/2 tooth cog. It's an 11 tooth cog that has been machined so that the chain doesn't fall all the way down to the cog's root.