Originally Posted by
northernlights
Why would you put such a large derailleur (and chain ring) on a small wheel bike
Derailleurs are not chosen based on the size of the wheel. They are chosen based on (1) the total slack that might occur between the smallest-tooth gear combination and the largest and (2) the size of the largest rear gear.
This bike has a 44T slack and a 32T rear. Might be hard to put a short derailleur on that sucker. Perhaps a better question you might ask is: is such a triple-chainring and rear cassette combination appropriate for the wheel size?
As to chainrings, it's only a 52T. A huge number of folders have a chainring that size. Heck, my Tikit has a 60T.
For me the big item is why you'd need such a low gear on that bike. This bike has a gear range of 18.9 to 95.3 gear inches! Seriously. 18.9. If they just tossed out the small front chainring and added a 60T, they'd have a range of 24.6 to 109.9, which would be awesome.