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so i'm building a bike using an 18" kula frame....the last 18" caldera frame i owned, had a top swing (clamp on bottom) front derailluer on it....now on this one, i'm wondering can i use a bottom swing (clamp on top) derailleur? not because i WANT to, but it's the only kind i can find for cheap...i'm just wondering if the clamp will clear the bottom water bottle cage mount.....also, any performance differences between TS or BS? thanks again!
 

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No difference in performance. They do the same thing. However, I'd go with the top swing. The bottom swing may not clear the chain stay when gears are changed.
 
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