Alloy frames do not rust, but they can corrode. Manufacturers combine elements including magnesium, titanium, iron, copper, chromium, zinc, manganese, silicon, and aluminum, but these elements usually include less than 10% of the frame weight. The elements of the alloy can increase the strength, corrosion resistance or addition ability or reduce the production cost.
In its original state, aluminum is like one-third of the weight of steel in the same coil. A well-made bicycle aluminum frame may weigh less than a steel frame structure, but this is not always the case. Mid-term high-end steel frame bicycles may weigh less than 25 pounds, while low-end aluminium alloy frame bicycles may weigh 35 pounds. The potential difference is partly due to the engineering requirements of the alloy frame,
