HT motorcycles were produced from late 1922 to 1924 by Arthur Hagg. The initials originally stood for Hagg Tandem (produced under that name from 1920 to 1922). In late 1922 Arthur Hagg changed the name of his machine from Hagg Tandem to HT. He also added a conventional model that sold as the HT Sports which employed the same engine and gearbox as previous models. The machines did not sell well and production ended in 1924.
The 1922 Olympia Show. H.T. (46.) All-weather Runabout and Sports Solo. 2¾ H.P. Model. 70×90.6 mm. (348 c.c); single cyl. four-stroke; sleeve valve; drip feed lubrication: Cox Atmos carb.; gear-driven mag.; 2-sp. gear; clutch and hand-starter; chain and belt drive; 26×2½,in. tyres. Price £80.
The H.T. Motor Cycle Co., Park Street, near St. Albans, Herts.
The Motor Cycle, November 30th, 1922