A BMX bike is a smaller and lighter version of a regular bike that is designed for doing stunts and tricks. BMX bikes are made out of strong materials like aluminum or chromoly steel that can handle jumps and bumps without breaking.
The tires on a BMX bike are thick and have a lot of tread to provide grip on dirt or concrete surfaces. The handlebars on a BMX bike are also different than regular bikes, as they are usually much shorter and have a larger grip area to allow for better control when doing tricks.
The seat on a BMX is also different, as it is much lower to the ground to allow the rider to move around more freely when doing tricks. This also makes it easier to pedal the bike quickly when needed.
Overall, a BMX bike is designed to be strong and maneuverable so that riders can perform tricks and stunts on various surfaces. It may look different than a regular bike, but it serves a specific purpose for those who love to ride and perform stunts.