I'm possibly unique but I had to get rid of my post-mounted rear rack and I replaced it with an Axiom rack that was inexpensive, fit perfectly (I have discs) and appears to be more robust than I need.
My issue with the post-mounted rack: My inner thighs rubbed on the quick-release mounting gear. 35 minute ride home left a good-sized raw spot that unbelieveably I didn't notice until after the ride.
