Triumphs pre-unit twin-cylinder motorcycles were produced from 1938 to 1962 with engine sizes of 350cc 500cc & 650cc. Ridden both on the road & in competition the bikes formed the basis for Triumphs success through the 1940s to the 1960s. With iconic names such as Speed Twin Tiger 100 Trophy & Bonneville the pre-unit Triumphs came as sports bikes & tourers. With their superb styling & reliable engines there were a favorite both at home & abroad.