Product review (3 stars): Wheel may not fit, can reuse the old one
This roller has the same part number as the old one.  It's also superficially the same however the roller wheel itself is about 1/4" larger diameter and won't fit in the old rack.  I was able to remove the wheel and reuse the old wheel which was a snap fit on this new part.  So if your old roller is broken this piece might let you fix it but it may require some fiddling around.