These immortal motorcycles, powered by Triumph's magnificent parallel-twin engine, are probably the most popular and sought after classic bikes in the world--so for most owners and potential buyers the question of originality is very important. The problem is, this information can be hard to find, but in this book long-time Triumph expert and author Steve Wilson provides the answers, backed up by detailed colour photography of outstandingly original examples of Speed Twins 1938-58, Tiger T100s 1939-58, Thunderbirds 1950-62, Tiger T110s 1953-61, and T120 Bonnevilles 1959-62. Mechanical components, frame, suspension, brakes, electrics, wheels, metalwork, instruments, badging, trim and colours and finishes are all covered, with some 300 specially commissioned photographs pinpointing correct original equipment and specification.
