The review by RobS is correct. If the spacing between the uprights for the basket is 22" then there is a gap of 1.5 inches...as measured on the box.
The response from Rubbermaid state "...the accessories do not currently reference such information."
Can you at least put the information on the website? By doing so it certainly would let us know that we have to purchase another upright in order to install it at 23.5" since the uprights already installed are 16" apart. Thanks.