I saw a fork that had a single bidon mount on each blade, midway down, and no eyelets on the dropouts. I don't understand the use of this. I was under the impression that any front rack would need an eyelet for mounting the bottom of the rack. Alternatively, a bottle cage needs a pair of mounts. So what's the function of this? Seems that there must be some other kind of mounting hardware. What is it?
Here's my representative sketch:
The mount is for pannier racks that sit low on your fork. In the absence of this mount I have seen a bracket used, but this is more secure. The rack also mounts using the front axle.
Depending on how old your bike is, it may be a front light fitting.
and
So theres a chromed bracket that bolts into the hole, and the old lamp gets slotted on top of it.
Here's a modern take on the same mounting location, letting you use a normal handlebar light but mounted lower down.
