Hase Spezialräder, also known as Hase Bikes, is a German tricycle, tandem and recumbent factory founded in 1994[1] in Bochum by Marec Hase.

[2][3][4] Extraschicht, a yearly cultural event of the Ruhr region takes places, simultaneously with other locations, in the old Waltrop's mine building, now head office of the company.

[5] Hase Bikes holds the Guinness Book of Records record for the longest tandem in the world, with 93 riders and more than 150m long.

[6][7]