Originally Posted by Duke7777

iab - Looking at your Cinelli, I see how you are able to get your GS to work on a 28. The small difference between chainring sizes allows you to have the jockey cage fairly wound up even when on the small ring. I would assume the OP is planning to use chainrings with a wider spacing than on your Cinelli, as it sounds like he is seeking fairly low gearing. Also, I suspect you would twist your hanger and/or derailleur if you inadvertently shifted onto the big cog while on the big ring. To avoid this grief, most folks prefer to make the chain long enough to permit the large-large combination, even if they never intend to use it. So yes, you can make a GS work on a 28, but there are necessary compromises that may defeat the purpose in wanting to use the 28 in the first place.