Originally Posted by
ScottRock
Man, i have a hard time believing adding a single link gives you too much slack if you're almost out of the dropout as-is, but hey.
It can be a real problem on frames with unusually short horizontal dropouts. I have a frame now that will work with 42/15 right at the end of the dropout, but I cannot add a 16T freewheel to the other side because I wouldn't be able to secure the wheel. If I added a link the chain would be completely slack in 42/15. I'm still deciding what to do about my gearing for that bike.