The center hole is for the bridge mount. Most bridges on bikes specifically
designed for fenders will have a threaded boss on the bottom of the bridge,
oriented toward the axle. For bridges with a brake bolt, you can still
mount a fender using a 90 degree bracket bolted to the brake bolt.
Anton
Anton,
What is the purpose of the center hole? The outside holes, I assume, attach
to the fender. Are there attachments beneath brake bridges for fender
mounting? If so, I probably could have saved myself some trouble over the
years.
Follow-up question, do these only work with center-pull/canti
