You are reading a single comment by @JurekB and its replies.
Click here to read the full conversation.
-
The cateye rear one mounts to the saddle itself - I'm not aware of one which mounts to the rails.
https://tinyurl.com/y9q86e4g
But it has to be a 2016 (or later) saddle - with a threaded insert moulded into the underneath of the saddle.
Cateye do a rear one that mounts in the Brompton saddle rails.