Designed to mount the Ostrich F-516 bar bag and Rivendell Sackville Bar Sack.
You want this if you don't like your bag moving around when you ride (as possible when you just rely on straps to attach a bag to a bar).
This rack is steady as a rock.
The cast double mounts require a handlebar with a straight section of at 4-1/16" to mount.
Fits the 24.0mm section of a road bar.
Will fit the 22.2mm section of a 25.4mm bar, too, but it will need a little shimming.