The first bicycles in the Swedish military were privately owned or bought for testing purposes. Bicycle infantry were first introduced in 1901, when a Gotlandic infantry regiment, I 27 in Visby, replaced its cavalry complement with bicycle-mounted troops. By 1942, there were six bicycle infantry regiments in the Swedish Army, operating mainly m/30s and m/42s. However, there were also examples of undesignated tandem bicycles for use by field radio operators and specially fitted pairs of bicycles designed for mounting a stretcher between the lead's rack and the rear's steer tube.