WhatClassAmIAutocross Classing Guide

SCCA® Solo classing — unofficial guide

What autocross class is a Fiat 124 Spider (incl. Abarth)?

CSStreetASTStreet Touring

A stock 2017–2020 Fiat 124 Spider (incl. Abarth) runs in CS (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: '124 Spider (incl. Abarth) (2017-20)' = CS. ST: 'Spider (2016-20)' = 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.