Performer Cycle Duet Tandem is a carbon framed tandem available with Shimano Ultegra, 105 or Tiagra component groups. For the few other companies manufacturing a carbon tandem plan on paying three to four times the price of the Duet Tandem. The Performer Cycle Duet Tandem offers a superior quality ride compared to steel or aluminum framed tandems. The carbon fiber frame is everything you would want it to be, lighter than aluminum yet stronger than steel.