Originally Posted by
madpogue
Option - if you're not interested in preserving it, and especially if it's brittle, you could poke at the dork disc from the other side until it cracks into two or more pieces through the hole, then just yank the pieces off from behind. I've done that with other dork discs when I didn't have the right freewheel tool handy.
will try that! pliers did not work