Can anyone say, definitely, categorically, beyond-a-shadow-of-a-doubt that a NU50 Urban Express rear rim is interchangeable with any other Honda Express that featured the 14" rims? Like the NC50 or NC50M Expresses from '80 and '81? Tried asking the local Honda dealer, but that is INVARIABLY a wasted effort; they claim that there is "no way" to differentiate between the various models' parts interchangeability because "all the parts have their own numbers. All we can do is tell you the number for each one's rear rim." Worthless.