Bicycle quick release is the part that can fix the wheel on the frame. People used to fix the wheel by two nuts, but nowadays many of them likes to use quick release instead. Because they can take the wheel apart the frame by hands less than one minute. It makes wheel changing and bicycles shiping much easier. If you still use the old way, you need to bring a wrench with all the time. Who?s gonna know when someting will happen? We can also make another quick release used on the seat post clamp, you can adjust your seat height conveniently with this.

professional bicycle parts manufacturer--witsport