SCCA® Solo classing — unofficial guide
What autocross class is a Mazda MX-5 Miata (NA/NB)?
ESStreetCSTStreet Touring
A stock 1990–2005 Mazda MX-5 Miata (NA/NB) runs in ES (Street) under the 2026 SCCA Solo Rules. Built to Street Touring allowances (within CST tire and wheel limits), it runs CST.
From the 2026 rulebook (Appendix A)
Street: 'Miata (non-Club Sport 2003) (1990-2005)' = ES; Mazdaspeed Miata (2004-05) also ES. ST: non-turbo '94-'05 = CST; '90-'97 non-Torsen cars listed in EST (no aftermarket LSD in EST per §14.10.K); Mazdaspeed = AST.
Unofficial guidance verified against the 2026 SCCA® Solo® Rules — always confirm against the current rulebook before competing. Classing data cites the exact Appendix A wording it relies on.