These CMI brake bars have three flat surfaces. They are not milled from round rods, but rather from a custom extrusion. The resulting bars are not as tall as round bars, but have similar rope contact areas. They are also deeper, providing a stronger notch.
These bars fit the old standard-size aluminum oval and D carabiners as well as 1¾ inch racks.
CMI made many other brake bars to fit their open-frame and closed-frame racks.
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