From the early 1960s through the mid‑1970s, Triumph’s T90 and T100 unit‑construction twins earned a loyal following for their lively performance, elegant engineering, and unmistakable British character. Triumph T90 and T100 Unit Twins: 1960–1974 is a concise, richly illustrated guide that traces the evolution of these classic machines and the era that shaped them.
Roy H. Bacon — one of the most respected historians of British motorcycles — offers clear, authoritative insight into each model’s development, technical refinements, and place within Triumph’s storied lineup. Period photographs, specifications, and expert commentary bring the bikes to life, highlighting what made them favourites among riders seeking reliability, agility, and style.
Whether you’re a restorer, collector, or simply an admirer of vintage British engineering, this compact volume provides an engaging and informative look at two motorcycles that helped define a generation of motorcycling.