Premium 4130 CrMo DJ frame, heat treated after welding for increased strength 898 degrees Celcius is the peak temperature that is used in the hardening process Campy-type 45/45 headtube, mid-BB, 135mm spacing rear Geometry is ideal for DMR Trailblade or short travel MTB fork 51mm International Standard disc mount Designed for microdrive setups, the largest compatible chainring is 25 tooth 5.0lbs (2.28kgs)