Originally Posted by
fietsbob
All the adjustable mounting brackets flex, a bit.
but to make it fit as many bikes as possible they chose to do that.
Consider getting a extra bracket or 2. previous posts have shown the flexing metal fatigue cracks the brackets, but having spares are the field repair.
+1
Surly brackets do occasionally break. Surly's Nice Rack with universal mounts that fit most any bike but none of them really good. One of the heaviest front racks too.