28.6 mm (1.125") Double Butted Tubes


Availability: Out of stock

  • • Designed by Columbus
  • • Alloy: Cromor 25CroMo4 with anti-dent treatment
  • • Cold-drawn and stress-relief treated for improved performance
  • • New anti-dent treatment: localized thermal hardening process counters dents caused by an impact or collision, with particular attention paid to the central areas of the tubes which are thinner and lighter
  • • Easy to weld & braze
  • • Reinforced in the welding/junctions areas up to 0.8/0.9/1.2mm
  • • Made in Italy

28.6 mm (1.125") Double Butted Tubes


Columbus Cromor Steel Alloy with anti-dent treatmentSince 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 CRMI12640+
Diameter 28.6 mm
Wall in mm .9\.6\.9
Center 320
Length 640
Butt 1 85
Taper 1 60
Center 320
Taper 2 60
Butt 2 115