From Warhammer 40k - Lexicanum
The Dirtcycle is an Imperial two-wheeled Atalan-class exploratory machine and is often used as an outrider by Genestealer Cults' Atalan Jackals.
Dirtcycles are built by the Departmento Munitorum mining corps to work for decades and even centuries. These rugged machines have a robust frame and shock-absorbing suspension array. Its engine can run on multiple fuel tools and can mount heavy loads. Like the Lasgun these vehicles are cheap and easy to manufacture. In this role they are valued when captured by Genestealer Cults posing as miners or workers.