Sounds like an 660 AM wheel,it has a larger taper the same as the poly wheel.
An original 066 ally wheel will fit.I have one on an 064 saw.
You need to use an 066 starter as the 066 wheel is wider than an 064.
An original 066 ally wheel will fit.I have one on an 064 saw.
You need to use an 066 starter as the 066 wheel is wider than an 064.