ok firstly that is not a specific downhill mountain bike for heavy duty downhill mountain cycling it dose not have the composition of molitation to equalivate the motov injeveinence that a downhill off road bike will need for riding gnarification track and exclusive jump size for downhill. i am just giving my opional view as i think this concept that u have here could be much better and could be a successful frame for the sport of downhill mountaing biycling if u worked on the angles and tublecles a bit more . yours sinceraly bogey man