NIOBIUM is a special steel with manganese, chrome, nickel, molybdenum and niobium. Columbus's special chemical composition, the combined effect of strengthening for precipitation and reducing the alloy grain size are incredibly enhanced compared to standard steels. Niobium proves more effective than Vanadium as an alloy-strengthening agent. After specific processes of progressive drawing and forming, NIOBIUM undergoes a special heat treatment that gives the steel its final characteristics. It is a steel designed to provide superior mechanical characteristics and higher resistance to environmental effects than conventional carbon steels. The only serious choice for a competition or top-of-the-line frame, where lightweight and reliability are essential.
The characteristics of the Spirit tubes
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Reduced thickness, up to 0.38 mm
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Exceptional mechanical characteristics: high breaking load, superior tenacity and incredible fatigue endurance
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Special shaping designed to optimise strength and resistance
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Excellent surface finish of tubes (no decarburization or oxidation)
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Individual inspection and marking of the tubes of the main triangle
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Main triangle in NIOBIUM and rear stays in seamless alloyed steel
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Incomparable strength/weight ratio
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Carbon seat tube can be incorperated into the build
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Adaptor for carbon seat tube
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Investment cast BB Shell "MARS" for single plug rear stays.
Reasons to choose Spirit
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Athlete: Spirit makes it possible to build a frame with an excellent resistance/weight ratio with durability beyond compare. The only serious choice for a top-of-the-line frame where lightweight and comfort are indispensable elements.
It's possible to make a frame with complete carbon rear triangle.
Columbus Spirit
