Originally Posted by
cyccommute
The FSA Alpha Drive is a 104/64 BCD which means it can take an inner ring as low as 20 teeth (you can find them on Fleabay and Amazon). Although I'm a proponent of going as low as possible, a 20/28 would be lower than a 26/28 by about 3 gear inchs (19 gi vs 22 gi). I would suggest getting a 9 speed mountain bike rear derailer to make life easier and you can get a 20/34 (16 gi) low unless you wanted to go really silly and get a 36 tooth low but even I think that's absurd
Forgive my ignorance but what is a 20/28? I know 20 is the teeth count correct? What is the 28? You are not talking double rings 20/28? Because 28 for the large ring seems awfully small.
The Aurora comes with a triple 48/36/26T.
Ah or are you matching low gear in front with low gear in rear? 20T front - 28T rear? Just comparing the ratio?