Heider Manufacturing built a line of tractors in Carroll, Iowa using their friction-drive system which was a mechanical continuously variable transmission. Heider first began production in 1911 and, by 1912, their tractors were being sold through the Rock Island Plow Company. Rock Island bought out Heider in 1914, although tractors carried the Heider - Rock Island name for several more years.
Model Power Years
No photo available Heider 6-10 11hp 1920 - 1926
No photo available Heider B 22hp 1911 - 1914
Heider C 12-20 tractor photo Heider C 12-20 17hp 1916 - 1924
No photo available Heider C 15-27 30hp 1924 - 1927
No photo available Heider D 9-16 17hp 1916 - 1929