Quick Answer: How Do You Identify Columbus Tubing?

What is butted tubing?

A butted tube is one where the outside of the tube is a constant diameter (usually 25.4, 28.6.

31.8, 34.9, 36.4 or 38.1 mm) and the wall thickness varies.

This is used for the top and down tubes.

When a lugged frame is being constructed, the seat tube would be single-butted..

What does double butted tubing mean?

Double butted means both ends of the tube are thicker, single means only one end is thicker than the middle section. There is even triple and quad butted. Triple means each end is a different thickness.

Where is Reynolds steel made?

BirminghamThe name has been synonymous with the British cycling industry since 1898, and it still manufactures tubing in its Birmingham factory today. The Reynolds company name stretches as far back as 1841, but it was the end of the 19th century when it moved into the bicycle trade.

How is butted tubing made?

After heating to over 1000 C, a hole is pierced through the center to form a very thick-walled tube. The wall thickness and diameter of this tube are then progressively reduced by hot rolling and cold drawing until it is sized for the butting process.

What is the best steel bike frame?

Best steel road bikesCondor Super Acciaio Disc. Made in Italy from custom Columbus Spirit HSS tubing, the Super Acciaio has been created by venerable London bike sellers Condor Cycles. … Cinelli Vigorelli Disc. A proper scrappy little fighter of a bike. … Ribble Endurance 725 Disc. … Genesis Equilibrium Disc. … Mason Resolution 2.

What is Reynolds steel?

Reynolds worked closely with Carpenter Speciality Alloys to develop 953. … 953 is based on a specially developed maraging steel stainless steel alloy that can achieve a tensile strength in excess of 2000 MPa (853 is around 1400 MPa), giving a good strength-to-weight ratio.

What are double butted spokes?

Butted spokes have at least two distinct diameters: single-butted (SB) spokes are larger at the elbow and smaller along the rest of their length, while double-butted (DB) spokes are larger at the elbow and the thread and smaller in the middle section.

What is Columbus Cromor?

Columbus Cromor is a 25CrMo4 steel, seamed and cold drawn, butted to variable thicknesses using shaped mandrills. Cromor steel is produced starting from a calibrated tube which has already received two drawing processes, before being reinforced in all the possible variable thickness off ered by the range.

What is Columbus Thron tubing?

Thron is full double butted standard Chromoly (probably just renamed Cromor). 531 is a manganese-molybdenum medium carbon steel. 525 is butted Chromoly (replaced 531). Thron is better than Aelle and Gara because those tube sets were constant thickness.

What is the best Reynolds tubing?

Senior Retro Guru. 853 is brilliant, considered by many to be the pinacle of steel tubing for bicycles. Unline more delicate steels such as 531, 853 actually becomes slghtly stronger when exposed to the heat involved in the welding process.

What is a 531 frame?

Reynolds 531 (pronounced ‘five-three-one’) is a brand name, registered to Reynolds Technology of Birmingham in the United Kingdom, for a manganese–molybdenum, medium-carbon steel tubing that was used in many quality applications, including race car chassis, aircraft components and, most famously, bicycle frame tubing.

What is True Temper steel?

True Temper is one of very few steel manufacturers producing the thin, variable-walled and precision balanced tubing that nice bikes require. … They also show up on world touring rigs, light but tough cyclocross bikes, and heavily abused mountain bikes.

How do you identify Reynolds 531?

On a seat tube, the thicker butted section is only at the bottom, so the post is inserted into the “thin” cross section of the tube. The ends of most Reynolds tubes were stamped: This is usually most evident on the steer tube, but it sometimes can be discerned on other tubes as well.

What is Reynolds 520 chromoly?

520 is the proprietary designation for a range of butted frame tubes made by Reynolds using a chromium molybdenum steel alloy similar to the AISI 4130 standard. Other manufacturers also make butted frame tubes of AISI 4130 chromium molybdenum alloy.