ZONA

An all-purpose, high performance tubeset, manufactured in Cyclex steel, a top quality chrome molybdenum steel which has been cold worked to increase its strength.
These tubes in this set have short butts and are super finished to remove any surface defects. A wide range of tube diameters and shapes allow us to build frames to the customer's exact requirements.
Technical Data: 60 - 70 Tsi

Progetto Zona: custom, competitive road, and MTB frames

The alloy selected by Columbus

• Nivacrom for Zona: Nivacrom is patented by Columbus. This is a steel alloy in which vanadium and niobium - precipitating in the metal matrix - block the grain growth during the elevated overheating of the welding containing the decline in the mechanical characteristics even at temperatures above 1000°C. The material developed for the Zona series, is subjected to a series of operations and treatments that, after drawing, homogenize the mechanical characteristics of the tube, making them uniform along the Iongitudinal axis. As a result, the fatigue behaviour is excellent.
• Mechanical characteristics: Rm = 1000 N/mm2, Rs = 920 N/mm2 Ap5 > 10%.

The characteristics of the Zona tubes

• Asymmetrical tubes with cylindrical reinforcements
• Moderate weight and notable strength thanks to the new shapes, which are introduced for the first time also for the tubes of the rear axis.
• Elevated reliability and fatigue Iife

Reasons to choose Zona

• Athlete: Zona is the design which finally allows for a reasonable compromise between weight, strength and life of the frame. Thanks to the particular operations to which Nivacrom is subjected and to the new sizes that also stiffen the frame Iaterally by means of suitable grooves, it is possible to obtain an finished product with good characteristics of lightness and a high efficiency.
• Framebuilder: Zona alIows for the construction of reliable frames which are easy to realize, both for the working of the tubes, the welding and the squaring operations of the frame. Thanks to Nivacrom, Zona takes fulI advantage of all the characteristics of this steel which has been especially developed for cycling.