Columbus Zona Road Tube Set

Columbus Zona steel tube set specially selected for our courses.

Type of Bicycle: Road, Gran Fondo and Randonneur.

This set of tubes offers a good balance between quality and ease of work, which is why it is particularly recommended for making your first frames.

The tubes are long enough to cover sizes S, M and L.

All sets are susceptible of some degree of customization depending of the stock we have at the moment!

350.00€

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· Columbus main tubes Oversize Zone 24CrMo4 alloy (UTS=9000MPa YS=800Mpa Ap5=12%)

· Upper tube round section 28.6mm Thickness 0.7-0.5-07mm Length 600mm

· Diagonal tube round section 31.8mm 0.7-0.5-0.7mm Length 600mm

· External tapered seat tube round section 28.6mm 0.8-0.6-1.2mm Length 620mm

· Rear Chainstays O.D. 16x30mm thickness 0.8-0.6mm Length 425mm

· Rear Braces O.D. 16mm thickness 0.7mm Length 560mm

· Cylindrical steering tube O.D. 36mm thickness 1.1mm Length 200mm for external steering and 1 1/8″ fork

· 68mm ISO thread bottom bracket axle.

· Vertical toe caps made of laser cutting with stainless steel reinforcement.

· Rear brake bridge

· Three cable guides, two derailleur sleeve stops with adjustable screw, a derailleur sleeve stop and cable guide for bottom bracket axle.

· Blind supports for 2 x stainless steel bottle holders

. 14 Brass Rods 2mmm UTS 450MPa, Solidus 870 – Liquidus 890 Cº * (Recommended Borax LFB Flux Cycle Design – Red Cap)

· 1 Silver Rod 48% 1mm UTS 550Mpa, Solidus 640º – Liquidus 680ºC for bottle holder supports and toe reinforcements * (Borax recommended Stainless Light Flux Cycle Design – Blue Lid)

· Includes original Columbus Zona sticker.

· Laser cut, machined and brazed ETB ISO tested drop outs (we have different options!).

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