Originally Posted by
bjjoondo

I seem to be "uninformed" on WHY, it's a faux pa to have the "so called", Dork Disc on the rear wheel!! I thought it was there to keep the "chain" from over riding the largest cog, so you all are saying, "it's not needed"?? So I take it that you all are saying that the "derailer" never goes so far out of adjustment that the chain can't override the largest cog?? If it's not needed, why does the mfg'er. of every bike made it seems put one on?? I'd like to be "enlightened" so let me know, thanks!

Because with it, you will never experience the required initiation to road cycling manhood - the 8 mile walk home with a broken derailleur, hanger, 6 spokes and a bent chain. The follow up to this rite is the dance to replace all the damaged equipment without your cycling buddies ever hearing of it and your wife never seeing the money leave.
It is a generous understatement to call any "man" cowardly enough to use a pie plate to miss this ritual just a "dork". The offense is far deeper.
Ben