BMX Bike Frames
BMX frames are made of various types of steel and aluminum. Cheaper, low end bikes are usually made of steel. Mid range bikes are mostly chromoly or hi tensile steel, which are about the same in weight and strength. High-performance BMX bikes use 4130 chromoly, or generation 3 chromoly which is a lighter material while also being very strong. The style of frame is the main variance in the BMX frame area. There are 3 main types of frame; Race, Dirt Jumping and freestyle (park, street, vertical ramp).