Vintage French randonneuer's and porteurs.

non-fixie · Mar 1, 2023

grantoury said:
I guess they fall into the centre pull category. I thought it had another name, but I may have been thinking of the roller cam brake.

And you were thinking along the right lines.

A quote from Jan Heine: "Some brakes are almost forgotten today, but at the time set new standards for performance, like the 1920s Jeay (below), which later saw a re-incarnation as the Roller-Cam for mountain bikes."

The history of bicycle brakes

Woz · Mar 1, 2023

There is also the Bebolux. It is more like a roller cam design in modern bike language.

Unlike a centre pull, you have no chance whatsoever to alter the spring tension per arm so each one hits the rim at the sametime.

These things IMHO require some serious baby sitting and maintenance to work as intended.

Guinessisgoodforyou · Mar 2, 2023

grantoury said:
I was thinking the same, no clue on name either. @Guinessisgoodforyou will know

non-fixie said:
According to most sources they're called "Jeay" brakes, and their design dates from the 1920's, but I've always thought that was a brand name.