The Triumph Model H is a British motorcycle made by Triumph Engineering Co Ltd in Coventry, England. A total of 57,000 Triumph Model H motorcycles were made from 1915 until production ended in 1923.

The 1921 Triumph H motorbike was a popular model produced by the Triumph company in England. It featured a 550cc single-cylinder side-valve engine with a three-speed transmission and chain drive. The bike had a top speed of around 50 miles per hour and was known for its reliability and durability. It also had a comfortable seat and easy handling, making it a popular choice for everyday use as well as for touring. The Triumph H was highly regarded and remains a sought-after classic motorbike today.