Bicycles:Onderwater Tandem

Powder coated, massive steel box-beam frame
Shimano Nexus eight-speed, sealed, internally geared hub
Shimano Nexus hub mounted dynamo powering headlamp and tail lamp
(no batteries needed - ever)
Front and rear roller brakes
Center stand, cargo rack and stainless steel fenders
Bolted and braced non-drive-side dropout allows for tire service without removing chaincase
Integrated rear wheel locking system

Steers from the rear seat. Similar in geometry and handling to a cargo bike.

One adult and one, two or three kids. One child gets to pedal (up front - the "stoker"), another can sit on an optional seat in front of the driver ( the "captain") and another can sit on a rear rack-mounted seat. Amazing.

Steers from the rear seat. Similar in geometry and handling to a cargo bike.