Columbus SL niobium is a re-launch 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.
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 600mm
FORK BLADES - oval tapered 28x19 mm to round tip 12,5 mm - Thickness 0,9 mm - Length 390mm - Weight 190 g each
FORK STEERER - either 1" threaded or 1" un-threaded subject to availabilty.
