Product review (1 stars): Too Narrow!
I just called GE to be sure I got the right part number for my GE Triton dishwasher, and I did.  However, the rack is about 1/4 inch too narrow, and it keeps sliding into the basin of the dishwasher.

I just measured the wheels, and they are all 1/2 inch wide, while three of the wheels on the old rack are 3/4 inch wide.  Swapping one out kept it on the track.  Sent GE a request for 3 of the 3/4 inch wheels so I don't have to return the item.