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.
From the 2026 rulebook (Appendix A)
Street: 'TR-8' = ES; all other Triumphs (except Stag) = HS.
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.