The cost of a mountain bike frame is proportionate to its material, as well as the treatment that material has received. Currently, there are five types of material used in mountain bikes – high tensile steel, chromoly steel, aluminum, titanium, and carbon fiber. Oversized diameters, heat treating, and butting are tubing material treatments that will increase the cost of a frame as well.
High tensile steel This is a very durable alloy that’s found in lower priced mountain bikes. It offers a high carbon content which makes it less stiff than chromoly steel, so more materials are needed to make it stiff enough for bicycle frames, which will in turn make it that much heavier.
Relatively inexpensive to produce, you’ll find this material in trail bikes, city bikes, and even entry level mountain bikes. There are some bikes that come with a chromoly seat tube, while the rest is high tensile steel.
Chromoly steel Short for steel alloy, chromoly is best described by its major additives – chromium and molybdenum. This is probably the most refined framing material, giving over 100 years of dependable service.
Depending on the type of...