HI,

Thanks for the photo but hard to tell from the pics....

FWIW - Our sprockets have a center hole about 1.5 inches in diameter (my good calipers are in the shop so just using a set of cheap calipers)....This has been found to fit every multispeed freewheel hub so far....Coaster brake people tend to need the center hole to be enlarged to 1.75 inches. We can machine the center to whatever is needed.

Hope this helps you.

Andrew