What is butted chromoly?
A workhorse of the industry, chromoly is a light, strong steel. When it is butted and shaped to take off excess weight, it can deliver a fairly light frame that will last through years of hard use. Chromoly is responsive and offers good flex while maintaining its form.
What is custom butted?
Custom butted means that the tubeset is specially butted for the manufacturer, or the manufacturer “cherry picks” tubes from different tubing suppliers to arrive at the characteristics that they require. “Every tube used in the construction of a Marin bike begins life as a simple, plain round tube.
Is chromoly stronger than aluminum?
Chromoly is slightly heavier than aluminum, but the frame can be thinner and has reduced stiffness, which provides a smoother ride. Steel is ductile, unlike aluminum, which makes it possible to offer stronger seamless steel tubes.
What is a butted frame?
Among steel frames, using butted tubing reduces weight and increases cost. Butting means that the wall thickness of the tubing changes from thick at the ends (for strength) to thinner in the middle (for lighter weight).
How tubes are butted?
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.
Do chromoly bikes rust?
With its resistance to extreme temperatures, chromoly steel needs a special welding technique when building frames or joints. Chromoly steel is also treated before and after manufacturing to increase the natural resistance to corrosion, dramatically lessening the chance of rust.
Does chromoly rust?
Why is a double butted frame good?
Double butting adds more layers to the joint at the ends making it stronger while keeping the tubes lighter and thinner in the middle to save weight.
What is triple butted MTB?
Triple butted – the tube has three different wall thicknesses; like a double butted tube, the ends of the tube have thicker walls than the center section, but the two ends have two different wall thicknesses.