cromor.
Resistance, reliability, duration. Cromor begins as a calibrated tube that has already survived two drawing processes, then takes its butting from shaped mandrels — variable wall thickness, put exactly where the frame asks for it.
the numbers.
Figures from the Columbus 2024 steel catalogue. Test bars, not marketing bars.
| 750MPa | ultimate tensile strength — the honest number that built a century of frames | UTS |
| 700MPa | yield strength — margin for a lifetime of service | YS |
| ≥ 12% | elongation at break, measured on Ap5 | AP5 |
the honest drawing.
“Some tubes are drawn to chase a number. Cromor is drawn to come home.”
Cromor is produced from a calibrated tube that has already received two drawing processes; a third pass over shaped mandrels gives each tube its variable-thickness butting. Material where the stresses live, air where they don’t.
It is the steel we hand to a builder’s first frame and a tourer’s hundred-thousandth kilometre with the same confidence.
- Drawing
- cold · three passes
- Butting
- shaped mandrels
- Walls
- variable thickness
- Character
- dependable
everyone started here.
“Ask a framebuilder about their first Columbus set. The answer is usually Cromor.”
Cromor is the entry to the Columbus catalogue and the alloy that refuses to leave it. Resistance, reliability, duration — three plain words that have outlasted every trend the industry has thrown at them.
- In service
- since the 1980s
- Discipline
- road · track · touring
- Reputation
- the legendary set
SEE THE RANGE — the Columbus tubesets →