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Old 06-25-18, 10:54 PM
  #28  
OneIsAllYouNeed
Long-term wear tester
 
Join Date: Dec 2006
Location: Seacoast, NH
Posts: 618

Bikes: Cycles Chinook travel/gravel/family tandem, KHS CX200 road/gravel, Voodoo Agwe fixie commuter, Gunnar Sport travel/road, Motobecane Boris fatbike

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While itís theoretically possible to build a much lighter tandem frame from carbon fiber, I donít think anyone has really pushed the envelope. Calfeeís site claims 6.25lb and 6.8lb frame weights for the Dragonfly and Tetra respectively. Iíve heard anecdotal evidence of sub-6lb frames from other builders. My Ti frame would be 7.0lb if it didnít have couplers. I wouldnít want my frame any stiffer. It should be possible to build a respectably stiff, sub-5lb frame with carbon, but I donít think itís currently happening. On the practical side, these frame weight differences are measurable, but their impact on on-the-bike speed is almost negligible.
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