da Vinci Designs Mountain Joint AdVenture Tandem . Built 2/25/02 with lower than 100 miles ridden. Sram 9.0 derailer with Sram Grip Shift, Avid Arch Brakes, White Industries Hubs, DaVinci Cranks, 175 entrance, 170 rear. da Vinci V22 wheels. I purchased the metal frame with the entire very best portions I may placed on it. Dimension is medium mountain.