Chater-Lea was a British bicycle, car and motorcycle maker with a purpose-built five-storey factory in Banner Street, EC1, in the City of London (now converted into flats) and, from 1928, premises at Letchworth, Hertfordshire. It was founded by William Chater-Lea in 1890 to make bicycle frames and components. It made cars between 1907 and 1922 and motorcycles from 1903 to 1935. William died in 1927 and the business was taken over by his sons John and Bernard. After vehicle production finished, the company remained trading as a bicycle component maker and contract manufacturer until 1987. The company relaunched in 2017 as a maker of high-end British manufactured bicycle components and launched its first new products in the summer of 2019.