Stack Exchange network consists of 177 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
Bicycles Stack Exchange is a question and answer site for people who build and repair bicycles, people who train cycling, or commute on bicycles. It only takes a minute to sign up.
I’ve been given this bike since it wasn’t used. It has this thing attached to the frame on the rear wheel. Does anyone know what it is for?
It's a bracket for holding an old style light like these
Photo from Amazon
Required, but never shown