Super Touring Alternate Miata Hubs
#30345 from Club Racing Board · Rule change · TB 21-03 (2021-03 Fastrack)
In ST, GCR section 9.1.4.M, add alternate front wheel hubs as follows:
"18. Allow alternate front wheel front hubs for the 90-05 Mazda Miata:
Mazda Motorsports Development Part #0000-04-5HUB-S1"