28.6 mm (1.125") Double Butted Seat Tubes


Availability: Out of stock

  • • Designed by Columbus
  • • Alloy: Spirit Niobium Steel
  • • Exceptional mechanical characteristics
  • • High tensile strength, superior resilence and incredible fatigue resistance
  • • Excellent tube-surface finishing and highly controlled alloy-composition for an excellent weld bead
  • • Made in Italy

28.6 mm (1.125") Double Butted Seat Tubes


Columbus Spirit Steel AlloySince 1919, Columbus has been a leader and innovator in producing steel tubing, first for the bicycle industry, later for aviation and Italian racing car and motorcycle chassis. Known for their extensive research in mechanics and metallurgy, frame builders can count on the guaranteed quality and controlled origin of Columbus to build bikes that combine stiffness and strength with increased resistance to deformation and breakage. The selection of tube profiles and alloys allow for customization to meet the needs of any rider, condition, or terrain. Favored by champions and top riders from Gimondi to Merckx, Hinault to Argentin, Lemond and Roche, Columbus is internationally recognized as “The Soul of Cycling.”

Additional Information

Part Number SPTI13620
Diameter 28.6 mm
Wall in mm .7\.4\.6
Center 295
Length 620
Butt 1 175
Taper 1 40
Center 295
Taper 2 40
Butt 2 70