In Reply to: 9N wheels compatible with TO-20 centers posted by Tom (WI) on October 24, 2020 at 19:01:40:
NO. The 9N/2N center disc is different -it's a 6 -bolt hole pattern with a larger center. The 8N centers are an 8-Bolt Hole Pattern, smaller diameter center hole, and also fit the Ferguson. (Hat) Rims, 28" on the 9N, 2N, & 8N will interchange center discs, but the 9N/2N center will not fit on the 8N wheel hub. Ditto for the Ferguson. The Ferguson 28" center discs are identical to the 8N except they have a scalloped outside perimeter. It had to do with the lawsuit.