Calfee Tandems are the tandems against which all others are measured
The benchmark in comfort, speed, fun, value and beauty.
In summary; a bike frame with carbon fiber tubing can be stronger, lighter, stiffer, more fatigue resistant and more comfortable than a steel, aluminum, magnesium, titanium or hybrid-carbon tubing bicycle. Our tandem frame design leverages the beneficial and intrinsic attributes of the carbon fiber material to manifest the best riding, and looking, tandem bicycles in the world. Very simply, the best tandem bicycles in the world.
Uses a high modulus carbon fiber (66 msi) co-mingled with Boron fiber to build the lightest possible tandem bicycle frame without sacrificing stiffness, durability and ride quality. Our Dragonfly tandem frame, size Large/Medium, weighs only 2900 grams or 6.25 pounds. Sculpted joints, inspired by our Dragonfly and Manta single frame models, are an option on our Dragonfly tandem frames.
Built with an intermediate modulus carbon (42 and 55 msi) at 3160 grams or 6.8 pounds in a Large/Medium. Notably, there is no weight limit on either our Dragonfly or Tetra tandem frames; certain tandem teams might benefit from enhanced frame stiffness, a $300 option. The Dragonfly might be described as livelier owing to the lighter, stiffer tube set. The thicker walls and lower cost of the ($6,195 for the Tetra compare to $8,295 for the Dragonfly) make the Tetra a popular choice for teams who opt for couplers.
Click Here to view examples of our one set of coupler option.
Still considering which tandem to buy, you’ll first need to consider frame material.
Why carbon fiber? Given carbon’s inherent qualities, why not? From our Technical White Paper: Carbon fiber exhibits the most desirable performance characteristics of any of the frame-building materials explored to date. It can be designed to be laterally stiff under heavy pedaling forces and still be light. It can absorb road shocks well, and still handle crisply while efficiently delivering complete power to the drive train. It can be durable and not subject to fatigue failures while remaining strong enough to stand up to unexpected impacts and torsion forces. It can lend itself to attractive finishing and resist corrosion or attack by the elements. And it can be formed in an attractive, functional way allowing it to move through air resistance easily. In summary; a bike frame with carbon fiber tubing can be stronger, lighter, stiffer, more fatigue resistant and more comfortable than a steel, aluminum, magnesium, titanium or hybrid-carbon tubing bicycle. Our tandem frame design leverages the beneficial and intrinsic attributes of the carbon fiber material to manifest the best riding, and looking, tandem bicycles in the world.
Our tandem frames, as light as the very lightest aluminum, titanium and hybrid-carbon frames from our competitors, set a new standard for comfort, durability, beauty, lateral-stiffness and power transmission. We are doing for the tandem world today what we did for the single world in 1987; building a lighter, stronger, stiffer, more absorbent frame that is faster and more fun to ride.
Notably, we offer a double Gates belt drive option; you can pair a Rohloff internally geared hub with a Gates drive and timing belt. Please see photos of this option below.
Tetra Off-Road Tandems
Calfee Design worked diligently to deliver you the most advantageous full suspension & front suspension off-road tandem platform in production. The ideal off-road tandem frame for a given team would fit the rider’s build, is very light and will absorb shock well. The Tetra Tandem handles crisply because of lateral stiffness and would deliver undiminished applied pedal power to the drive train. Off-Road Tandems are durable and not subject to fatigue failures and are strong enough to stand up to unexpected impacts and torsion forces. The Calfee finish is attractive and would resist corrosion or attack by the elements. Our off-road tandem frames leverage the beneficial and intrinsic attributes of the carbon fiber material to realize these qualities.
- Compatible with electronic drivetrains
- Internal wire and cable routing
- Off-Road Front Suspension Tandem (27.5″): $6,495
- Off-Road Full-Suspension Tandem (27.5″)(includes X-Fusion Microlight RL shock):$9,195
- Upgrade to Fox Float DPS for $50:
Calfee Bamboo Tandems
A functional and elegant alternative
There are many good reasons to choose Calfee Bamboo for your next tandem bicycle frame. Calfee Bamboo bicycle frames are very stiff, transferring power efficiently; are durable, resisting damage from stress and impacts; are comfortable, surpassing aluminum, steel, titanium and most carbon frames in smoothness. Our bamboo tubes mitered together and bound by epoxy soaked hemp fiber create a frame whose most notable characteristic, beyond beauty, is this incredible vibration dampening.
Compared to our carbon tandem frames, our bamboo enjoys similar ride characteristics. The subtle weight penalty (a Large/Medium bamboo tandem frame weighs about 8.5 pounds) may be offset by our bamboo’s beauty, uniqueness, comfort and durability. Our bamboo frames are an excellent choice for tandem teams interested in particularly rough roads.
Tetra Fat TIRE Tandem
Ready to roll-anywhere!
This carbon fiber model is right at home on any terrain; sand, dirt, snow, including tens of thousands of miles of shoreline!
Tetra Convertible Tandem
We are excited to introduce a new model in our line of performance tandems, the Tetra Convertible. This adaptable platform is wholly functional as both a tandem and single bicycle.
Precisely located S&S Couplings allow for the easy removal/addition of critical frame sections. As well, component selection is optimized to support the very same. A tandem team would enjoy a pedal as a pair one day, and the very next, one or both riders as solo cyclists.
Convertible Tandem Features
- Tandem easily converts to a single and back again
- Travel with this convertible tandem in regular luggage; fits in (1) 26x26x10 case and (1) 32x20x12 case
- Stock or custom geometry; review stock tandem geometry here
- Tetra Convertible Tandem frame retails for $10,795
- Consider this drawing of the Convertible tandem frame
- 25 year warranty
Couplers, a great option for traveling teams and an option on both Tetra and Dragonfly, add about 2.8 pounds. The Tetra travel tandem weighs only 28 pounds with couplers; contrast to the 21.4 pound Dragonfly shown below. Complete tandems weigh as little as 21 pounds, with most registering between 26 and 33 pounds on the scale.
Calfee Design is proud to offer our tandems with 1 set of couplers ($1250 plus custom case) One complete tandem can now fit inside a TriAll3Sport Velo Safe Case (including both wheels). With minimal disassembly, you and your partner can be out riding your tandem in less than 20 minutes.
Dragonfly Tandem With Custom Paint
Do you have any other interesting tidbits about your tandems? Sure!
Our Dragonfly tandem earned the award for Best Tandem Bike at the 2013 North American Handmade Bicycle Show. Calfee carbon tandem frames are coveted by the world’s best tandem cyclists as this three minute video evidences. Enjoy this build detail about the Tetra 29er tandem with electronic shifting, pictured below. Please consider this photo album to explore some frame finishes and component options.
You don’t have to take our word for it; with over 25 years of advanced composites engineering and manufacturing, we’ve received volumes of feedback. In all of those years, no collection of words comes close to “Our Calfee Journal; documenting the first year of ownership”. This is a must read; an expert and objective accounting of a tandem enthusiast’s experience with our Tetra.
Many of our clients are choosing to enjoy the many advantages of Shimano’s electronic Dura Ace and Ultegra groups, on both singles and tandems. Owing to the absence of a triple ring option, we modify the rear derailleur to create compatibility with large, 36 tooth (or larger!) cogs. The resultant gear ratio will get you up any mountain with only a double crank. Further efficiencies are realized with Gates Belt Drive; all of our tandems are compatible.
Importantly, both our Tetra and Dragonfly are compatible with all frame and fork options.
Calfee Design 1-800-965-2171