Product review (5 stars): Excellent replacement for GE dishwasher roller axles
Our GE dishwasher is now over seven years old, and for the past several months one or more of the wheels (not always the same one) would pop off just about every time the lower rack was rolled out of the dishwasher.  I did a simple search here on Amazon and found these.  I decided to replace all eight axles at once instead of doing it piecemeal over the next few years as each of the originals failed.

The old axles can be popped out by pressing firmly on the hub, and the new ones pop in very easily.  I had all eight installed in less than ten minutes, and the bottom rack now rolls in and out more smoothly than ever.