cafiend has left a new comment on your post "Dork disk":
Pie plates don't work any better than the federally-mandated "safety" devices do. They'll protect from some degree of misalignment, but they can be circumvented by any number of common situations, including simply repeated overshifts of a misadjusted derailleur. The disk may wear through or break loose. Stay? Go? "Amputation not necessary. In two week, it fall off."
Posted by cafiend to Cyclelicious at 10/26/2008 08:37:00 PM