The Street Triple S arrived in Triumph’s 2017 Street Triple overhaul, when the company launched an all-new generation of its middleweight naked bike family. That update marked a major step for the nameplate, moving it to a new 765cc triple platform and giving the range a more contemporary chassis, styling, and electronics package while preserving the lightweight, agile character that made the Street Triple a standout. In Triumph’s own history, the Street Triple line traces back to 2007, but the S designation as a distinct model began with the 2017 family refresh. In later years, Triumph continued to use the Street Triple S badge on an A2-compliant 660cc version aimed at accessible performance and European licensing requirements, showing the nameplate’s role as the more approachable entry point in the Street Triple family. Because the exact final model year for the S badge is not confidently verifiable from the available official sources, the end date is left open.
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