SCCA® Solo classing — unofficial guide
What autocross class is a Triumph TR-8?
ESStreet
A stock 1978–1981 Triumph TR-8 runs in ES (Street) under the 2026 SCCA Solo Rules.
Class by preparation level
| Stock (Street) | ES |
| Street Touring | — |
| Street Prepared | — |
| Street Modified | — |
| Prepared | — |
A “—” means the car isn’t listed at that level; a build lands in the least-prepared category its modifications allow.
From the 2026 rulebook (Appendix A)
Street: 'TR-8' = ES; all other Triumphs (except Stag) = HS.
Other ES cars
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. Spot an error? Report it on GitHub.