The Cannondale RZ One40 Carbon 2 2010 Mountain Bike. Being the carbon version, Cannondale use proprietary layup techniques and SystemSix technology to deliver the best performance possible from the combination of Aluminium and Carbon fibre. Also designed with a 3D-forged "BackBone" which combines the BB30 bottom bracket, lower pivot, and double-butted seat tube into a three dimensionally forged part.