The Big Bang C9 MTB tandem is Duratec’s performance handrail 29er. This version is designed for 2x or 3x drivetrains. Each C9 is built with large-diameter 7020 T6 aluminum alloy tubes to ensure the rigidity and torsional stiffness required to produce a world class performance tandem frameset.
Each C9 tandem is built-to-order in the Duratec factory located just outside of Pilzen, Chech Republic. Available in 11 different sizes and 15 standard colors with custom geometry and paint available upon request.
Duratec tandems take 4 weeks to produce and ship via Federal Express or DHL directly from the factory in Czech Republic to authorized dealers and consumers across North America.
Each C9 MTB tandem frame includes: headset, seat clamps, rear thru axle and replaceable rear derailleur hanger
Frame: 7020 T6 aluminum alloy
Optional rigid fork: 7020 T6 aluminum alloy 100x15mm (includes SRAM Masle)
Headset: 1 1/8" - 1 1/2" FSA ORBIT IS
Rear spacing: 142x12mm
Max rotor size: 203mm
Max tire clearance: 29x2.25
Bottom brackets: BSA Standard 68mm
Seatpost size: 27.2
Front derailleur mount: 34.9 clamp diameter, designed for bottom pull
Bottle cage mounts: 1 or 2 sets for the pilot (depending on frame size), 2 for the stoker
Custom geometry + $250 (Call or email for details)
Custom paint + $250 (Call or email for details)
Internal Di2 wiring kit + $250 (wires and junctions installed for internal seatpost battery)
Rear rack mounts + $40