You must be aware that frame is the core component of Mountain bike. Can you imagine a human body without skeleton? No, the same truth holds good for mountain bike. Mountain bike frame is a structure of various metal tubes that supports its other parts. Mountain bike frames consists of front frame and rear frame. Assembly of different tubes like head tube, top tube, down tube and seat tube in triangular and diamond shapes will set up front and rear frames. Geometry of mountain bike frame will be decided by the length of different tubes and the angles at which they are fitted together. Size of the frames, frame geometry and frame material would decide riding suitability of Mountain bikes.

Traditionally steel has been the riding suitability for frame construction however new materials like aluminum alloys, titanium and carbon fibers have also been used successfully.

So when you have made up your mind on how you would like to ride your new mountain bike as cross country or freeride or racing or touring, your main important criteria should be mountain bike frame.