Product review (4 stars): A bit thick, works as front wheel.
The model #'s matched up but the wheel that came in was a bit thicker than the wheels on the rack.  It would not work in the second position, but I moved the front wheel to the second position and put this new wheel on the front.  That works fine since the front wheel does not hit the impressed 'rail' on the side of the tank.  I was surprised how tight the tolerances were on this.

If I needed to replace 3 or more wheels I'd need to take some to the grinder to make them a little bit less thick.  This would work fine as there's plenty of material before the hub.  For all I know there are batch-to-batch variations and/or my dishwasher tub is a bit askew.

Anyway, I'm very happy to have a rack that rolls smoothly again - amazing how much frustration one missing wheel can cause!