They sit below the rim so Sheldon says they are for canti as u-brake mounts would sit above.
Question remains that the studs are spaced out from the frame by washers, but nowhere are there the usual 3 holes for the canti tension spring to be slotted. :?
Sound like they're designed for flash cantis with bushings that can be adjusted to set the spring tension. Off the top of my head: Graftons 'spring' to mind, but there'll be a thousand others too.
Sound like they're designed for flash cantis with bushings that can be adjusted to set the spring tension. Off the top of my head: Graftons 'spring' to mind, but there'll be a thousand others too.