Leave it to the Danes to come up with this cool-looking carrierbike. Bicycling stats show 20 percent of the trips in Denmark are made by bicycle.
The trioBike, based in Copenhagen, features a carrier bike that transforms into a bike and stroller.
Two kids can ride in the carrier on the front of this tricycle. The front carrier can be removed and turned into a stroller.
Meanwhile, a spare wheel is attached beneath the carrier. After the stroller section is removed, the wheel is is attached to the bike's fork and you've got a bike.
I'm not sure how this is an advantage over the good ol' Burley trailer, expect you can keep an eye on your passengers more easily. I always was concerned my son would try to climb out of the trailer on our trips, but he was always content to sit back there and yell, “Go faster!”