Columbus SL niobium is re-edition of the legendary SL tube set. Top tube is standard diameter 25,4 mm, 28,6 mm is the diameter of down tube and seat-tube. Steel is the material that was first used in the construction of top-of-the-range frames because of its superior mechanical characteristics, most notably its superior fatigue resistance and a breaking load second only to that of advanced composite materials. Columbus research has always worked towards the customization and development of materials with characteristics intended for cycling use. The results are of international importance.
Columbus’s history is the creation of steels with patented formulations such as the famous Nivacrom.
TOP TUBE - round 25,4 mm - Thickness 0,8 - 0,5 - 0,8 mm - Length 600mm - Weight 218 g DOWN TUBE - round 28,6 mm - Thickness 0,8 - 0,5 - 0,8 mm - Length 650mm - Weight 268 g SEAT TUBE - round 28,6 mm - it fits a 27,2 mm seat-post - Thickness 0,8 - 0,5 mm - Length 635mm - Weight 230 g CHAIN STAYS - round 22mm/oval 26x17mm/round 12,5mm - Thickness 0,7 mm - Length 410mm - Weight 145 g each SEAT STAYS - round tapered 14 to 10,5 mm - Thickness 0,7 mm - Length 560mm - Weight 90 g each
HEAD TUBE - For 1" steerer, diameter 31,7 mm - Thickness 1mm - Length 300mm
FORK BLADES - oval tapered 28x19 mm to round tip 12,5 mm - Thickness 0,9 mm - Length 390mm - Weight 190 g each
FORK STEERER - not included in the set - available at request - 1" threaded - 1" un-threaded
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