WhatClassAmIAutocross Classing Guide

SCCA® Solo classing — unofficial guide

What autocross class is a Mazda Mazdaspeed MX-5 Miata?

ESStreetASTStreet Touring

A stock 2004–2005 Mazda Mazdaspeed MX-5 Miata runs in ES (Street) under the 2026 SCCA Solo Rules. Built to Street Touring allowances (within AST tire and wheel limits), it runs AST.

From the 2026 rulebook (Appendix A)

Street: 'Mazdaspeed Miata (2004-05)' = ES. ST: 'Mazdaspeed Miata (2004-05)' = AST.

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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.