Chromoly Vs Mild Steel Chassis

With dom 4130 and docol being the most common as many sanctioning bodies do not allow mild steel erw.

Chromoly vs mild steel chassis. One of the never ending topics of conversation is the use of 4130 steel over mild steel in professional drag racing builds. Aluminum is the second most commonly used material for bicycle manufacturing. In this short video tim mcamis explains some of the differences between 4130 chromoly and mild steel tubing for use in drag race chassis construction. It s lighter and stiffer than steel but it s also more brittle and easily damaged.

4130 is better due to the amount of weight savings you can have with it. If anyone has a viable answer please let me know. In today s chassis it is common to find mild steel erw tubes high strength steels hss such as dom and 4130 chrome moly chromoly and advanced high strength steels ahss like docol tube r8. It will still save your life if done right.

In a trail rig like mine i will be using mild steel and a mig. I have a dragster frame and i don t know what it is made of. If it is mild steel then i have to rebuild the whole thing. If it s chromoly then i just have to replace a couple of struts and add more to my roll cage to bring it to specs.

When cost is a factor as for most of us mild steel is a good choice. Chromoly is slightly heavier than aluminum but the frame can be thinner and has reduced stiffness which provides a smoother ride.