Originally Posted by
wilfried
I've heard it called a "skirt guard," meant to prevent loose clothing from getting caught in the wheel. And, as it happens, there's a Wikipedia article on skirt guards, which pictures a Citi Bike:
https://en.wikipedia.org/wiki/Skirt_guard
You may be right. But I was using the "automotive terminology".
Meanwhile, I've ben using THIS Thing, which I call a Chain Guard , or a Derailleur Guard, though it's sort of a combination of both, and sometimes I call it a Daggerboard , which is a term used by Surfers:
IMG_4059 by
AviationMetalSmith, on Flickr
It's intended to slice through weeds so they don't get tangled in my Derailleur Pulleys...
And then , I need to mention that I often call Derailleur Pulleys "Idler Gears" ...
I need to publish my own Glossary ...