Hollywood Bike
- Manufacturer of a variety of single and twin tandem bikes. Thailand.
- http://www.hollywoodbike.com

Santana Tandems
- Makes premium, value, exotic, family, and custom tandems. Includes advice on traveling with a tandem, and a test to see if tandeming is for you.
- http://www.santanatandem.com/

Love Bike
- Makes tandem bicycles and tandem bike child parent, and tandem mountain bikes. USA.
- http://www.lovebike.com

The Granny Bike, quadcycle-PPV
- The Granny Bike is a kit that converts two standard bicycles into a quadcycle. It can be used for, exercise, the physical challanged, recreational cycling, rental, and retirement communities.
- http://www.thegrannybike.com/

Da Vinci Designs
- Handbuilt tandem bicycles with independent coasting drivetrain, from Colorado, USA. List of features and contact information.
- http://davincitandems.com/

Bilenky Tandems
- Builders of performance and custom tandems. Product range, standard geometries, and color choices.
- http://www.bilenky.com/tandems.html