| 1. | Bilenky Tandems | | | Builders of performance and custom tandems. Product range, standard geometries, and color choices. www.bilenky.com |
| 2. | Da Vinci Designs | | | Handbuilt tandem bicycles with independent coasting drivetrain, from Colorado, USA. List of features and contact information. davincitandems.com |
| 3. | Tandem Bar - Make a tandem with two bikes | | | Use the Tandem-Bar to join two adult's bicycles or a child's bike and an adult's bike. The Tandem-Bar enables pushing or hauling another cyclist. www.tandembar.com |
| 4. | 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. www.santanainc.com |
| 5. | Co-Motion Cycles | | | Makers of tandem bicycles, touring bikes, travel bikes, road bikes and custom bicycles. www.co-motion.com |
| 6. | 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. www.thegrannybike.com |
| 7. | Bohemian Bicycles | | | Traditional custom, hand-crafted tandems and bicycles with specialized lugs and filigree. Detailed photographs are featured. www.bohemianbicycles.com |
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