I believe most recent purchases have this. I called Delta
and they did not know why.... The larger pulley is also
a different sized arbor than the standard.

Mike wrote:

I am assembling my DJ20, btw very heavy, and there is a pulley mounted on
the motor...the pulley is about 4"3/4 ....
BUT there is another one included...seems to be better quality and is 5"1/4
but does not fit in the motor arbour..?????

anyone got this on theirs?

Which pulley size should it be?

TIA